Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： To explore the evolution characteristics of erosion and deposition in the main stream of the Tarim River from Kelelik to Yingbazha, this study analyzes typical river channel parameters, including section width, thalweg length, curvature index, and shoreline length, based on Landsat satellite imagery and hydrological station water and sediment data during the flood periods from 1993 to 2024. In the past 32 years, the bending coefficient of the river channel has increased from 2.20 to 2.56, the average annual growth of the thalweg length is 0.27 km, and the meandering trend of the river channel has intensified. The maximum widening range of the upstream section of the river section exceeds 585%, whereas the middle and lower reaches are relatively stable. The thalweg shifts northward, with an average annual migration rate of 0.1 km·a-1, and the local bending causes the maximum swing amplitude of the main trough to exceed 3 km. Over the 32 years, the main stream of the Tarim River experienced five cycles of bending and straightening, which led to the adjustment of the main channel and the deviation of the flow direction, resulting in the abandonment of the five water inlets. The average annual growth rate of the left bank shoreline length is 0.149 km·a-1, which is three times that of the right bank, and the main channel continues to shift to the left bank. River meandering and erosion may threaten the irrigation guarantee rate and flood control safety of coastal farmland and ecological forests. The results of this study can serve as a basis for the planning and design of river flood control and regulation projects from Kelelik to Yingbazha
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： Soil salinization is a critical barrier to ecological restoration and sustainable development in the arid regions of Northwest China. To screen for plant resources suitable for greening saline-alkali lands in this area and then evaluate their efficacy, this study focused on 18 halophyte species from the Karamay Halophyte Botanic Garden, and considered Xanthoceras sorbifolium as a control. Twenty physiological and biochemical indicators were systematically measured under salt stress, including leaf water content, leaf thickness, chlorophyll content, antioxidant enzyme activities, and chlorophyll fluorescence parameters. A comprehensive salt tolerance evaluation system based on leaf traits was constructed using principal component analysis (PCA) and the membership function method. The results showed significant differences in salt tolerance among the 19 species, with comprehensive evaluation values (D- values) ranging from 0.20 to 0.67. Among the plants tested, Caragana sinica and Suaeda salsa demonstrated the strongest salt tolerance (D=0.67), whereas Xanthoceras sorbifolium was the most sensitive (D=0.20). PCA revealed that photosynthetic fluorescence parameters and the antioxidant enzyme system are core indicators that reflect plant salt tolerance. This evaluation system is objective and accurate; the identified superior halophytes provide important germplasm resources and have a scientific basis for vegetation restoration, ecological rehabilitation, and landscaping in saline-alkali land of the arid regions of northwest China.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： Winter wheat is a major cereal crop in northwestern China. However, increases in its productivity are still constrained by water scarcity and inappropriate irrigation practices. A two-year field experiment was conducted from 2022 to 2024 using three soil moisture lower limits, namely 50%, 65%, and 80% of field capacity (FC), at different growth stages of winter wheat. Six treatments (W1-W6) were designed to investigate the regulatory effects of soil moisture lower limits on water consumption, plant growth, grain enzyme activity, sugar accumulation, yield, and water use efficiency (WUE), followed by a comprehensive benefit evaluation. The results showed that, at maturity, the W3 treatment was conducive to wheat growth and yield formation in both experimental years. Compared with the W6 treatment, W3 increased growth parameters by 14.05%-17.42%, accelerated the grain filling rate by 1.22-1.35 times, increased yield by 20.22%, and improved WUE by 19.15%. Under the W3 treatment, the activities of three key enzymes involved in grain sugar synthesis were less impaired, and grains retained a certain carbon assimilation capacity during the middle and late grain-filling stages. Sugar accumulation under W3 increased by 13.38%-19.86% compared with W6, indicating that W3 was favorable for sucrose and starch synthesis in grains. Correlation analysis and partial least squares path modeling (PLS-PM) further demonstrated that appropriate regulation of soil moisture could improve plant growth, enhance grain enzyme activity, and promote sucrose metabolism and starch accumulation, thereby increasing yield and WUE. In the comprehensive benefit evaluation, W3 ranked first in both years, with yields of 10625.54 and 10344.43 kg·hm-2, respectively. In conclusion, using 80% FC as the soil moisture lower limit from heading to grain filling, and 65% FC during the other growth stages, with FC as the upper irrigation limit, represents an optimal irrigation strategy for winter wheat cultivation in arid regions. This study clarifies a relatively irrigation regime and provides a basis for evaluating and selecting improved management practices for winter wheat production.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： Near-surface atmospheric water (NSAW) serves as an important hidden water source in arid-zone ecosystems, where its role in mediating water compensation is key to alleviating vegetation water stress amid the increasing frequency of extreme droughts driven by climate change. However, the compensation process, underlying mechanisms, weighting schemes, and quantification methods associated with NSAW and vegetation water remain to be further clarified. Therefore, this paper reviews the research progress on the hydrological processes and functional mechanisms of NSAW, the compensation mechanisms of NSAW for vegetation and soil moisture, and the quantification methods for phase transformation of NSAW. Existing research findings indicate that vegetation can absorb and utilize NSAW water through stomata, cuticles, or specialized structures, and this pathway predominantly governs the process by which vegetation acquires NSAW water. NSAW water is absorbed or liquefied by the soil, indirectly regulating vegetation water content through the hydraulic redistribution (HR) process of the root system and thereby establishing a new moisture balance. Dynamic observations of NSAW, along with high-precision analysis of water sources, have been achieved through the integration of micrometeorological monitoring and stable isotope technology. This approach contributes significantly to the quantification and simulation of phase transformations in the field of NSAW. Nevertheless, reaching a consensus on the quantification of NSAW phase transformation remains challenging owing to the lack of parameters related to the physical properties of materials, particularly thermodynamic parameters. This deficiency results in an absence of data on the efficiency of leaf absorption of gaseous water, as well as a shortage of multiscale coupling models. In conclusion, this review posits that future investigations should focus on achieving breakthroughs in the coupling effects of NSAW and carbon assimilation, the development of collaborative monitoring technologies utilizing multisource data, and the construction of multiscale dynamic models. These advancements are expected to provide a theoretical foundation for the efficient utilization of water resources under arid conditions.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： Abstract: Studying the effects of future land-use change scenarios and different precipitation frequencies on re-gional water yield can provide decision support for water resources planning and adaptive management. Taking the Nanchuan River Basin in Xining as a case study, we coupled the PLUS and InVEST models to simulate land use/land cover (LULC) patterns and water yield dynamics under four future scenarios: natural development (ND),ecological protection (EP), city expansion (CE), and cropland protection (CP). We further analyzed the spatiotemporal evolution and driving factors of water yield from 1986 to 2020. Results showed that the mean annual water yield was 126.93 mm during 1986-2020, exhibiting a non- significant declining trend with a detected mutation point in 1995. Compared with the baseline period (1986-1994), the water yield in the variation period (1995-2020) decreased by 30.93 mm, with climate change and human activities contributing 65.5% and 34.5% of this change, respectively. By 2050, projected water yields under the ND, EP, CE, and CP scenarios will be 189.95 mm, 185.22 mm, 189.96 mm, and 186.99 mm, respectively. In wet (P=10% ), normal (P=50% ), and dry (P=90% ) years, water yield is projected to reach 223.34 mm, 116.50 mm, and 50.43 mm, respectively. LULC, the normalized difference vegetation index, and precipitation were identified as the primary drivers of spatial heterogeneity in water yield, with“LULC ∩ elevation”and“LULC ∩ precipitation”showing nonlinear enhancement effects.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
CHEN Yuefang
LI Yule
LI Zhengsheng
NIU Kechang
ZHOU Huicheng
TILIHAWULI Dahambai
Bayaerta
TONG Yongshang
Abstract： To investigate the response patterns of plant communities in the semiarid mountain grasslands of Yili, Xinjiang, to short-term nitrogen application, this study examined the Tohulasu Grassland in the Yili River Valley. Four nitrogen application rates (N1: 50 kg·hm⁻²·a⁻¹, N2: 100 kg·hm⁻²·a⁻¹, N3: 150 kg·hm⁻²·a⁻¹, and N4: 200 kg·hm⁻²·a⁻¹) were compared with a control group. Over one growing season, the effects of different nitrogen inputs on community aboveground biomass, community composition, and species diversity were analyzed to elucidate the key pathways through which short-term nitrogen application enhances aboveground biomass. Nitrogen application exerted a unimodal effect on aboveground biomass, with N3 treatment yielding the optimal result, a 52.08% increase relative to the control. The biomass of the dominant species, Dactylis glomerata, increased by 132.12% relative to the control. There were significant increases in community height and cover, but not in community density. Nitrogen application caused significant alteration in species diversity patterns: the importance value of D. glomerata increased by 65.01% under the N3 treatment relative to the control, whereas the importance value of the primary associate species, Trifolium repens, decreased by 65.54% under the N4 treatment relative to the control. Overall, community diversity first decreased and then increased as the nitrogen application rate increased, with the lowest diversity observed under the N3 treatment. Mantel tests revealed that species diversity was regulated primarily by the biomass of subdominant species and the density of dominant companion species. Structural equation modeling indicated that nitrogen application exerted significant, positive, and direct effects only on dominant and subdominant species. Overall, a nitrogen rate of 150 kg·hm⁻²·a⁻¹ was most effective for vegetation restoration in the semiarid mountain grasslands of Yili, Xinjiang.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： To gain an in-depth understanding of precipitation processes in the Yinshan Mountains region of Inner Mongolia, this paper presents a systematic investigation of the microphysical characteristics of a stratiform precipitating cloud system based on aircraft observation data collected on April 19, 2024. The results show that: (1) Due to mountain blocking, moisture accumulation, and orographic forced lifting, significant differences in cloud microphysical characteristics were observed between the northern and southern sides of the mountains at the same flight altitude. On the northern side, the cloud system was characterized by lower liquid water content, with cloud particles predominantly consisting of small droplets with diameters less than 15 μm, exhibiting high total number concentrations and a relatively narrow spectral width. In contrast, on the southern side, higher liquid water content, fewer particles, and a significantly broader spectral width were observed. (2) The spatial distribution of liquid water content at the edges of the cloud area was uneven. Particle sizes in this region were significantly smaller than those in the interior of the cloud body due to the effects of turbulence and evaporation. The concentration of small cloud droplets decreased due to the coalescence process of melting ice crystals near the 0 °C level, while the concentration of large cloud droplets increased significantly, accompanied by a broadening of the particle spectral width measured by both instruments. (3) Vertical observations indicate that large precipitation particles at higher altitudes undergo melting during descent, resulting in the presence of a substantial number of partially melted cloud particles at lower levels. Meanwhile, the breakup of precipitation particles during their fall leads to a narrowing of the precipitation particle spectrum at lower levels and an increase in the number concentration of cloud particles. This study systematically elucidates the refined effects of factors such as topography and turbulence on cloud microphysical structure. The findings can be directly applied to improve numerical weather prediction models and cloud seeding operation strategies for this region.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： Using conventional meteorological observation data,hail observation data,and the European Centre for Medium-Range Weather Forecasts ERA5 reanalysis dataset,the K-means clustering method was applied to classify the synoptic patterns of 53 hail events in the Longdong Loess Plateau from 2012 to 2023.Meanwhile,the characteristic features and threshold values of key physical parameters for different hail types were summarized. The results show that:(1)The large-scale circulation associated with hail events in Longdong can be categorized into three types:low-trough type (20 .8%),low-vortex type (22 .6%),and northwest airflow type (56 .6%).The 700 hPa shear line and surface convergence line correspond well with the hail occurrence areas for all types.(2)The low-trough type mainly occurs in late spring and early summer (May-June);the low-vortex type mainly occurs in summer (June-August);and the northwest airflow type occurs from April to October,with the highest frequency in June (37%).(3)Diagnostic analysis of physical parameters indicates significant differences in environmental field characteristics among the three hail types.The low-trough type is characterized by strong stratifi cation instability and weak shear,with a large K-index and a low special-layer height.The low-vortex type is characterized by high energy and moderate shear,with large Convective Available Potential Energy,abundant low-level moisture,and a high special-layer height.The northwest airflow type is characterized by low energy and strong shear,with dry stratification in the middle and lower levels,an average 0-6 km vertical wind shear>12 m ·s-1,and thin thickness of the 0 ℃ and −20 ℃ layers.(4)Nine parameters were selected to establish forecast thresholds for hail in Longdong.Validation results indicate that these thresholds have practical reference value and can provide quantitative reference indicators for hail potential forecasting in the region.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： Accurate monitoring of soil salt content is critical for optimizing land management and maintaining ecological balance. In this study, the Pingluo County of Ningxia was used as the research area, and 16 spectral indices were extracted based on Sentinel-2 remote sensing imagery and ground-measured soil sampling data. Three feature selection methods were integrated to identify key variables, and Bayesian optimization was employed to tune the hyperparameters of four machine learning algorithms, thereby developing a high-accuracy soil salinity prediction model. The inverse distance weighting method was used to compare the spatial distributions of the measured and predicted points. The results indicate that the sequential forward selection with cross- validation(SFSCV) method enhances the reliability of feature selection via a stable cross-validation mechanism, effectively identifies the spectral indices most sensitive to soil salinity, and enables the construction of superior prediction models. The XGBoost model based on features selected by SFSCV and optimized with Bayesian optimization achieved high prediction accuracy. The validation set yielded a coefficient of determination of 0.625 and a root mean square error of 1.120. The developed model was applied to predict the soil salt content in Pingluo County, and the validation results showed high consistency. The residual values between the actual and predicted soil salinity values were primarily distributed within the range of −0.98~0.82 g·kg-1. This study shows that feature selection combined with Bayesian optimization significantly enhances the generalizability and prediction accuracy of the model in complex environments, making it suitable for soil salinization monitoring.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： An understanding of soil aggregate composition and stability under different land-use types in the Hexi Corridor can reveal how soil structure responds to anthropogenic disturbances in arid regions and provides a scientific basis for soil quality assessment and sustainable land management.Four representative land-use types in the Hexi Corridor were selected:cropland,orchard,forestland,and grassland.Soil samples were collected from the 0-20 and 20-40 cm depth intervals.Wet sieving was employed to separate soil aggregates into the following four size fractions:>2,0.25-2,0.053-0.25,and mined,and aggregate stability indices were calculated,including mean weight diameter,geometric mean diameter,proportion of macroaggregates (R0.25),and the ratio of macroaggregates to microaggregates.Soil aggregate composition,stability,and their driving factors under different land-use types were analyzed.Across all land-use types in the study area,soil aggregates were dominated by the 0.25 mm fraction;the >2 mm and 0.25-2 mm fractions constituted relatively lower proportions.The mass proportions of the >2 mm and 0.25-2 mm aggregates were significantly higher at both soil depths in forestland compared with cropland and grassland,whereas no significant differences were observed among cropland,orchard, and grassland.Generally,aggregate stability followed the pattern of forestland >orchard >cropland >grassland. In the 0-20 cm layer,forestland exhibited significantly greater stability than all other land-use types.In the 20-40 cm layer,forestland was significantly more stable than cropland and grassland but did not differ significantly from orchard.However,within each land-use type,aggregate stability did not vary significantly between the two depth intervals.Correlation analysis indicated that aggregate stability was unrelated to soil pH but was positively correlated with soil organic matter and total nitrogen content.Overall,forestland in the Hexi Corridor exhibits significantly higher soil aggregate stability than cropland,orchard,and grassland;this is primarily due to the accumulation of soil organic matter and total nitrogen,which are key determinants of aggregate formation and stability in this region.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： This study aimed to elucidate the growth-promoting effects and underlying mechanisms of exogenous inoculation with arbuscular mycorrhizal (AM) fungi on Lycium barbarum under natural field conditions, with the goal of advancing mycorrhizal technology in the L. barbarum industry. Lycium barbarum 'Ningqi No. 9' was used as the plant material, and Rhizophagus intraradices and Funneliformis mosseae served as the test inoculants. A field plot experiment was conducted at the Huinong L. barbarum Planting Base in Ningxia, comprising two treatments: inoculation with AM fungi (AM) and a non-inoculated control (NM). Parameters assessed included plant growth, root mycorrhizal colonization rate, rhizosphere soil physicochemical properties, and fungal community structure. The results demonstrated that, relative to the NM treatment, the AM treatment significantly enhanced plant height (P < 0.001) and stem diameter (P = 0.032) of L. barbarum, and increased the concentrations of total phosphorus, total potassium, and available potassium in the rhizosphere soil. Furthermore, AM inoculation altered the beta-diversity of the rhizosphere fungal community and fostered a more complex, densely connected, and efficient fungal co-occurrence network, as evidenced by higher node counts and connectivity, along with reduced average path length and betweenness centrality. The AM treatment also decreased the relative abundance of indigenous AM fungi while increasing both the relative abundance and diversity of plant pathogenic fungi. Notably, root mycorrhizal colonization rate was not significantly affected. Hierarchical partitioning analysis revealed that attributes of the fungal co-occurrence network accounted for the largest proportion of the variance in L. barbarum growth (33.86%), followed by soil phosphorus and potassium nutrient status (30.78%), plant pathogenic fungi (19.40%), and saprophytic fungi (9.82%). In conclusion, the growth-promoting effect of AM fungi on L. barbarum is primarily achieved through the restructuring of the rhizosphere fungal interaction network, the enhancement of soil phosphorus and potassium availability, and the modulation of the balance between pathogenic and saprophytic fungi, rather than through the conventional mechanism of high mycorrhizal colonization. These findings offer a novel perspective for microbial management strategies in L. barbarum cultivation within arid regions.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： Against the backdrop of rapid urbanization, ecological and environmental pressures are intensifying, making the coordination between economic development and ecological conservation a critical issue for regional sustainability. As a key ecological security barrier and economic growth corridor in Northwest China, the ecological condition of the urban agglomeration in the northern slope of the Tianshan Mountains is of great significance for regional sustainable development. Existing studies have primarily focused on ecological value accounting in agro-pastoral transition zones, while research at the scale of oasis-based urban agglomerations in arid regions remains limited, particularly in capturing the spatial heterogeneity of vegetation. To address this gap, this study integrates agricultural production statistics with actual regional vegetation characteristics to revise ecosystem service value (ESV) equivalent factors. net primary productivity (NPP) and the normalized difference vegetation index (NDVI) are further incorporated for secondary refinement. Based on these improvements, priority areas for ecological compensation are identified. The results show that: (1) the comprehensive land-use dynamics in the study area exhibited an overall declining trend from 2000 to 2020, characterized by reductions in bare land and grassland, alongside increases in other land-use types. (2) the ecosystem service value of the urban agglomeration in the northern slope of the Tianshan Mountains demonstrated a general upward trend over the past 20 years, with an average value of 1176×108 yuan, and high-value areas mainly concentrated in high-altitude forest regions. (3) areas with higher priority for ecological compensation are primarily located in Dabancheng District, Mulei Kazakh Autonomous County, and Urumqi County. These findings provide a scientific basis for delineating priority ecological compensation zones and promoting the coordinated advancement of ecological conservation and highquality development in the urban agglomeration in the northern slope of the Tianshan Mountains.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： To address the accuracy limitations of conventional remote sensing approaches for water body extraction in desert environments,which are commonly affected by mixed pixels and boundary blurring,this study proposes a desert water extraction model that integrates the normalized suspended material index (NSMI)with the multi-index collaborative water extraction method (MICWE),termed MICWE-NSMI.The Ulan Buh Desert was selected as the study area,and Landsat 8 OLI surface reflectance imagery from 2020 was used.Image preprocessing,including cloud removal,radiometric calibration,atmospheric correction,maximum value compositing,and index calculation,was performed on the Google Earth Engine platform.A 30 m buffer zone was constructed along the preliminary water boundaries extracted by MICWE,within which turbid water bodies were further refined by combining inverted NSMI with Otsu adaptive threshold segmentation.A comparison with Sentinel 2 imagery validation results indicates that the proposed MICWE-NSMI model significantly improved the boundary integrity and connectivity of highly turbid waters,narrow tributaries,and flowing water bodies,with an overall accuracy of 93.7%and a Kappa coefficient of 0.82.Compared with conventional index-based methods,the deep learning-based ResUNet model,and the Joint Research Centre global surface water dataset,the proposed model effectively reduces water body fragmentation and misclassification in complex scenarios,including lakes in desert hinterlands,irrigation tributaries,and the Yellow River channel.By integrating conventional water body indices with the spatial heterogeneity of suspended sediment,this study expands the methodological framework for remote sensing identification of highly turbid,fragmented,narrow,and dynamic water bodies,providing a new technical pathway for desert and arid-region water resource monitoring.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： This study investigated whether different measurement methods for soil total carbon (STC), soil organic carbon (SOC), and soil inorganic carbon (SIC) yield varying results, which is essential for accurately assessing soil carbon pools in calcareous soils. A total of 793 soil samples from depths of 0–100 cm were collected in June 2019, June 2023, and September 2023 across grasslands, deserts, and farmlands in Xinjiang. This study compared four analytical methods for soil carbon research: dry combustion, wet oxidation, gas volumetric, and indirect methods. The compa rison focused on bulk soil and soil fractions with particle sizes below 53 μm. The study also established reliable conversion equations for correcting the results between these methods. According to the results, for STC determination, the dry combustion me thod was significantly superior to the indirect method in terms of accuracy and stability; the latter systematically underestimated STC by a range of 3%~11% in soils with high pH values and obvious salinization properties, which can be attributed to insufficient reaction time between high-carbonate soils and hydrochloric acid. For SOC determination, the tested methods exhibited good consistency in most practical measurement scenarios; however, the indirect method was significantly affected by the degree of soil salinization: it underestimated the SOC content in non-saline soils while overestimating it in slightly to moderately saline soils, a phenomenon closely related to salt ions inhibiting carbonate dissolution during the entire determination procedure. For SIC determination, the gas volumetric method was verified to be the most optimal and reliable approach, whereas the indirect method generally underestimated SIC by 20%~42%, and the extent of such estimation errors exhibited a clear and gradual increasing trend with increasing soil pH. In conclusion, it is strongly recommended to prioritize the dry combustion method for STC determination and the gas volumetric method for SIC determination in calcareous soil carbon assessments. In addition, adequate calibration of the results obtained using the indirect method based on specific soil pH values and salinization levels is essential to effectively improve the overall accuracy and interstudy comparability of carbon assessmen toutcomes. This study provides a solid and valuable scientific basis for the rational selection of analytical determination methods and the reliable calibration of test results in calcareous soil carbon storage evaluation, thereby supporting more consistent, accurate, and comparable soil carbon research globally.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： Accurately identifying potential land-use conflicts and clarifying their multiscale spatiotemporal evolution characteristics and influencing factors hold significant practical implications for optimizing territorial spatial patterns and achieving sustainable regional development.Using the Xinjiang as a case study,this study adopts a land-use competitiveness perspective and uses a multicriteria evaluation method to develop models for the competitiveness of ecological,agricultural,and construction land.This approach optimizes the method for identifying potential land-use conflicts,yielding 4 conflict-intensity levels and 12 conflict types.The spatiotemporal evolution characteristics and scale effects of potential land-use conflicts in Xinjiang from 2000 to 2023 were compre hensively and systematically examined across three scales—grid (micro),county (local),and municipal (macro)— and the aggregation characteristics and influencing factors of potential conflicts were investigated.The results re veal that (1)from 2000 to 2023,the overall competitiveness of construction land in Xinjiang increased significantly,agricultural land competitiveness strengthened,and ecological land competitiveness improved slightly.(2)The patterns of potential land-use conflicts exhibited certain similarities and differences across the grid,county,and municipal scales.(3)Overall,potential land-use conflicts in Xinjiang intensified.Conflicts between agricultural and ecological uses have been alleviated to some extent.In contrast,conflicts between construction and agricul tural uses have intensified,and conflicts involving construction,agriculture,and ecology simultaneously have worsened.(4)Potential land-use conflicts in Xinjiang exhibited significant spatial aggregation effects,demonstrating a pattern of“high in oases,low in deserts,and nonsignificant in mountains.”Hotspot areas of conflict showed a trend shifting from“high-density concentration”to“dispersed diffusion.”(5)Potential land-use conflicts in Xinjiang resulted from the combined effects of the natural environment and socioeconomic factors, among which land-use intensity and distance to roads significantly influenced potential conflicts.Synergistic in teractions among the influencing factors were observed,and the combination of natural and socioeconomic factors enhanced the explanatory power regarding potential conflicts.The findings provide a scientific basis for differentiated spatial governance in Xinjiang,ranging from municipal-level strategic coordination and county-level policy adaptation to grid-based,precise remediation to optimize the territorial spatial pattern in arid regions.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： Global climate change has increased the frequency and intensity of extreme climate events, severely threatening ecosystems in arid and semiarid regions. As an ecologically vulnerable zone in Northwest China, the Hexi Corridor presents an obvious warming and drying trend. Clarifying vegetation responses to extreme climates is therefore essential. Based on meteorological data (1961–2020) and MODIS NDVI datasets (2000–2020), we calculated 27 extreme climate indices using the RClimDex tool. Combined with inverse distance weighting interpolation and correlation analysis, this study explored the spatiotemporal variations of extreme climates and their vegetation responses. The results indicated that: (1) Extreme temperature exhibited an increasing trend. TX90p and TN90p increased by 2.1 d·(10 a)-1 and 3.0 d·(10 a)-1, showing an obvious asymmetric diurnal warming. TXx and TNx rose by 2.8 °C and 2.1 °C, with Jiuquan in the northwest as the high-temperature center. (2) Extreme precipitation displayed increasing amount and intensity. PRCPTOT, RX1day, and RX5day increased by 60.5 mm·(10 a)-1, 0.38 mm·(10 a)-1, and 0.65 mm·(10 a)-1, respectively. Precipitation was concentrated in the southeast due to orographic uplift. (3) Vegetation sensitivity exhibited distinct spatial heterogeneity. Northwestern vegetation was more sensitive to extreme temperature, while central and southwestern vegetation responded strongly to extreme precipitation. NDVI was significantly positively correlated with R95p (r_xy = 0.61), with positive correlation areas exceeding 50%; TXx was negatively correlated with NDVI across the entire study area. This study clarified the spatiotemporal variations of extreme climates and their influencing mechanisms on vegetation in the Hexi Corridor. These findings provide scientific references for ecological vulnerability assessment and climate-vegetation feedback understanding in arid inland basins, supporting ecological conservation and sustainable development in arid Northwestern China.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： In this study, the effects of magnetized saline water irrigation on soil aggregate stability,nutrient distribution, and enrichment were investigated, and the optimal magnetization parameters were clarified. Methods: A field microplot experiment was conducted with four magnetic field intensities (0 T, 0.2 T, 0.4 T, and 0.6 T) and two salinity levels (3 g·L-1, brackish water; 6 g·L-1 , saline water). The characteristics and regulatory effects of different magnetized saline water treatments on soil aggregate size distribution, stability (MWD, GMD), and aggregate available nutrient (N, P, K) contents were examined. Principal component analysis was used to comprehensively evaluate the experimental results and determine the optimal magnetization level. Results: The results demonstrated that (1) magnetic treatment promoted soil aggregation and alleviated salt stress-induced aggregate structure degradation. Compared with nonmagnetized treatments, the proportion of water-stable aggregates >0.25 mm, MWD, and GMD increased significantly under magnetic treatment (P<0.05). (2) Magnetization significantly enhanced the ammonium nitrogen, available phosphorus, and available potassium contents in all aggregate sizes. Furthermore, nutrients were primarily enriched in >0.25 mm macroaggregates (approximately 68% by mass). (3) As the magnetic field intensity increased, the aggregate stability and nutrient content first increased and then decreased, with the peak value appearing at the 0.4 T treatment. Conclusion: Comprehensive analysis indicates that under the present experimental conditions, 0.4 T magnetic treatment yields the best overall improvement in aggregate stability and nutrient enrichment. Therefore, it is recommended as the optimal parameter for improving soil structure and maintaining nutrients under brackish or saline water irrigation.
Subjects: Geosciences >> Geography submitted time 2026-06-02 Cooperative journals: 《干旱区研究》
Abstract： Clarifying the structure of precipitation types and their variation characteristics in southern Xinjiang, a typical arid region, is critical for understanding the evolution of the regional water cycle. Based on the China’s First Generation Global Atmospheric Reanalysis from May to September (warm seasons) during 1981-2024, this study used various methods, including trend analysis, wavelet analysis, and Mann-Kendall test, to analyze the characteristics and variation trends of large-scale precipitation (LSP) and convective precipitation (CP) in southern.Xinjiang during warm seasons and their contributions to total precipitation (TP). The results demonstrate that (1) the TP in the mountainous areas of southern Xinjiang is significantly higher than that in the plain areas. TP in mountainous areas of southern Xinjiang is significantly higher than that in plains. LSP is the main source of TP in mountainous areas, where high LSP proportion regions are distributed. CP is the dominant source of TP in plains,which are also high-value areas of CP proportion. Over the past 44 years, TP in southern Xinjiang has shown an overall increasing trend, with a more significant growth trend in mountainous areas than in plains. The growth rate of LSP is obviously higher than that of CP in mountainous areas, while the opposite was true in plains. All three types of precipitation in the mountainous and plain areas changed abruptly around 2000. After 2005, they exhibited a shift from below-normal to above-normal. (2) During each warm season month, the maximum values of mean TP, coefficient of variation, and increasing trend in mountainous and plain areas appear in August and June, respectively. The monthly variation trends of TP are consistent with those of LSP in mountainous areas and with CP in plains, respectively.The mean values and growth trends of TP and LSP are significantly higher in the mountainous areas than in the plain areas. The diurnal variation characteristics of TP in the mountainous areas are dominated by LSP, with distinct differences in the peak periods of the three precipitation types. The TP peak occurs from 14:00 to 23:00 during May-July and delays to 17:00 to 02:00 in August-September; the peak periods of LSP and CP occur around 20:00 and 14:00, respectively. In the plain areas, the peak times of the diurnal variations of the three precipitation types are comparable, all occurring from 20:00 to 02:00, and the diurnal variation of TP is jointly influenced by LSP and CP. (3) Over the past 44 years, the TP in southern Xinjiang during warm seasons has exhibited multiscale fluctuations. The periodic variation in TP in the mountainous and plain areas is consistent with their respective LSP. The most significant 2-3 year variation period occurred from 2005 to 2013.The main variation periods of CP in the mountainous and plain areas occurred after 2000. The results of this study provide a scientific basis for research on precipitation mechanisms, artificial precipitation enhancement operations,and water resource management in southern Xinjiang.
Subjects: Geosciences >> Geography submitted time 2026-05-25 Cooperative journals: 《干旱区地理》
Abstract：随着旅游业的发展和生态环境的日益脆弱，旅游生态安全问题备受关注。以全球引文数据库（WOS）、中国知网数据库（CNKI）筛选获取的277篇国内外旅游生态安全研究文献为对象，采用CiteSpace可视化分析软件绘制了相应的知识图谱。结果显示：（1）2000—2024年国内外旅游生态安全研究的发文量整体呈上升趋势。（2）国外研究机构中澳大利亚和美国的研究机构发文量较多；国内研究机构中湖南师范大学旅游学院发文量最多。（3）国外研究倾向于运用深度学习、物联网技术等跨学科方法，探讨气候变化、可持续性、生态完整性等全球性议题，研究尺度较为宽泛；国内研究则注重运用地理探测器、驱动因素-压力-状态-影响-响应模型等方法，关注旅游地评价、时空演变、可持续发展等多维度议题，研究尺度具有更细化的区域划分特点。（4）关键词突现分析显示，国外将更加注重旅游活动与生态环境的相互作用和影响机制以及对可持续发展的深入探讨；国内则关注对整个旅游城市生态安全的评估，且注重旅游生态安全的障碍因子、可持续发展以及时空格局等方面。未来国内旅游生态安全研究应从拓宽研究视野、创新研究指标与方法及加强国际合作交流等方面加以推动，以实现旅游业与生态环境的和谐共生。
Subjects: Geosciences >> Geography submitted time 2026-05-25 Cooperative journals: 《干旱区地理》
Abstract：搜集2024年新疆地质遗迹、A级景区与基础设施POI等县域数据，运用空间分析技术和数理统计模型，基于共生理论分析要素协同发展的空间分布特征与共生协调等级，以“地质+旅游”共生发展为主导、基础设施配套服务为支撑，进行空间协同区划。结果表明：（1）各要素均为显著空间集聚分布，空间集聚程度排序为整体基础设施>A级景区>地质遗迹。（2）地质遗迹、A级景区和整体基础设施空间密度分别呈现“一带单核单极”“双极三核”和“单极单核”的分布特征，标准差椭圆反映各要素空间分布方向大体一致，重心均在和静县境内。（3）地质遗迹对A级景区、整体基础设施存在吸引倾向，全局空间协同水平较低。地质遗迹与A级景区、基础设施局部空间协同水平分别呈现“西高东低、南强北弱”的分布态势。（4）全疆共生协调等级呈现“橄榄球型”等级结构，中高级共生协调占据主导，北疆以中高级共生协调为主，南疆以中级共生协调为主。（5）基于分析结果，提炼出5种新疆地质旅游空间协同区划,并提出相应开发模式与优化路径。
Date
Hits
Downloads
Comment