Arid Zone Research ›› 2022, Vol. 39 ›› Issue (4): 1282-1292.doi: 10.13866/j.azr.2022.04.28

• Agricultural Ecology • Previous Articles     Next Articles

Grain size characteristics and spatial heterogeneity of farmland soils in the Syr Darya River Basin of Kazakhstan

HE Jing1,2(),Jilili ABUDUWAILI2,3,4(),MA Long2,3,4,Galymzhan SAPAROV3,5,Gulnura ISSANOVA3,6   

  1. 1. College of Resource and Environment Sciences, Xinjiang University, Urumqi 830046, Xinjiang, China
    2. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
    3. Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
    4. University of Chinese Academy of Sciences, Beijing 100049, China
    5. Kazakh Research Institute of Soil Science and Agrochemistry Named after U. U. Uspanov, Almaty 050060, Kazakhstan
    6. Faculty of Geography and Environmental Sciences, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
  • Received:2021-10-18 Revised:2021-12-06 Online:2022-07-15 Published:2022-09-26
  • Contact: ABUDUWAILI Jilili E-mail:1130062311@qq.com;jilil@ms.xjb.ac.cn

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.

Key words: Syr Darya River Basin, soil grain size, spatial heterogeneity, semi-variogram