Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2022-09-26 Cooperative journals: 《干旱区研究》
Abstract： This article takes the farmland soils in the Syr Darya River Basin of Kazakhstan as the research object, combining classical statistics and geostatistics methods, and investigates the characteristics of soil grain size and spatial heterogeneity in the 0-20 cm soil layer. Results showed that the distribution characteristics of soil particles with different particle sizes in each study area were similar, and the average content of particles with particle sizes of 0.25-0.05 mm and 0.05-0.01 mm is the highest. Except for subzone 3, the content of soil particles with a particle size of 1.0-0.25 mm has strong variability, while that of other sizes has a moderate degree of variability; Except for soil particles with a particle size of 1.0-0.05 mm in subzone 1, the nugget coefficient of soil particle content of other particle sizes is all < 40%, and that of each particle size in subzone 2 is all < 50%, in subzone 3, except for soil particles with a particle size of < 0.001 mm, the nugget coefficient of soil particle content of other particle sizes is < 40%. These findings revealed that the composition of soil particles in each study area has been affected by varying degrees of random factors; The Kriging interpolation method was used to interpolate the content of soil particles of different sizes in the study area. The interpolation results showed that the content of soil particles of different sizes in the study area demonstrated different distribution characteristics in the spatial distribution. The research results can provide a scientific basis for the rational use of farmland soil and the improvement of degraded soil.
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