Grain size characteristics and spatial heterogeneity of farmland soils in the Syr Darya River Basin of Kazakhstan
锡尔河流域哈萨克斯坦境内农田土壤粒度特征及空间异质性
He J. Abuduwaili J. Ma L. Saparov G. Issanova G.
15 July 2022Editorial office of Arid Zone Research
Arid Zone Research
2022#39Issue 41282 - 1292 pp.
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.
semi-variogram , soil grain size , spatial heterogeneity , Syr Darya River Basin
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College of Resource and Environment Sciences, Xinjiang University, Xinjiang, Urumqi, 830046, China
State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Xinjiang, Urumqi, 830011, China
Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Xinjiang, Urumqi, 830011, China
University of Chinese Academy of Sciences, Beijing, 100049, China
Kazakh Research Institute of Soil Science and Agrochemistry Named after U. U. Uspanov, Almaty, 050060, Kazakhstan
Faculty of Geography and Environmental Sciences, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
College of Resource and Environment Sciences
State Key Laboratory of Desert and Oasis Ecology
Research Center for Ecology and Environment of Central Asia
University of Chinese Academy of Sciences
Kazakh Research Institute of Soil Science and Agrochemistry Named after U. U. Uspanov
Faculty of Geography and Environmental Sciences
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