Subjects: Geosciences >> Geography submitted time 2023-06-28 Cooperative journals: 《干旱区地理》
Abstract：从中国北方农牧交错带粮食安全和粮食单产的重要性出发，利用空间自相关分析揭示带内粮食单产的空间分异及演化特征，作为划分农牧业发展地域的依据，进而利用地理探测器模型揭示控制单产分异的主导因子及其交互作用，藉此探讨提高带内粮食单产、保障粮食安全的对策。结果表明：（1）20002020年带内粮食单产呈现相对稳定的集聚分布态势，自然环境分异大势是其基础性控制因素，社会生产条件及其耦合水平则强化了粮食单产的空间分异特征。（2）单产热点区主要集中在带内东北部平原地区和西南部河湟谷地，冷点区分布在中部水土流失区和丘陵地区，次热和次冷点区则围绕热、冷点形成圈层结构；依据该格局可将热点区划分为宜农区，将次热和次冷区划分为农牧耦合区，将冷点区划分为生态修复区，以因地制宜地促进带内农牧业协调发展。（3）20002020年带内粮食单产的增长模式从以劳动力为主导转变为以现代农业技术为主导，但出现了劳动力与耕地、现代农业技术之间过度解耦，以及各种现代农业技术之间的耦合性不足等问题，因而提出了以人-地-技耦合发展促进粮食单产健康增长、提高粮食安全保障能力的建议。
Subjects: Geosciences >> Geography submitted time 2023-05-17 Cooperative journals: 《干旱区地理》
Abstract： New urbanization includes the basic characteristics of urban- rural coordination, urban- rural integration, industrial interaction, conservation and intensiveness, ecological livability, and harmonious development. It is mainly manifested in terms of population, economy, land, society, and ecology. This study constructed a comprehensive evaluation index system from five factors, i.e., population urbanization, economic urbanization, land urbanization, social urbanization, and ecological civilization, to reveal the quality of new urbanization in provincial capitals of western China and determine its development trend. For this, the comprehensive scores of new urbanization of provincial capitals in western China and the scores of each factor layer in each city from 2005 to 2019 were calculated by means of entropy and weighted summation method. The Q-type cluster analysis method and partial correlation analysis method were used to calculate the comprehensive level, single item level, and single item level correlation of new urbanization in provincial capitals of western China. The analyses revealed the following results: (1) New urbanization in different cities has different and unstable development levels, and the construction of new urbanization is still in the exploratory stage. The development imbalance within and among the three regions is prominent; the cities’comprehensive scores of new urbanization in the northwest region are far behind the southwest region and the middle reaches of the Yellow River. (2) Provincial capitals of western China have a weak attraction for talents. The economic level and social development show great differences, indicating that the quality of life of the residents needs to be improved. (3) Economy and ecology have achieved coordinated development; however, other single urbanization factors exhibit imbalances. Cities should use land more economically and intensively since land urbanization is faster than population urbanization. Based on the above conclusions, related recommendations are also presented. The findings of this study can contribute to the development of new urbanization in western China.
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