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Analysis of the Characteristics and Influencing Factors of Soil Particle Composition in Ningxia

ZHOU Lei1, QUI XiaoLi2, ZHOU Tao3, MA ChangBao4, LI JianBin1, LONG HuaiYu1, XU AiGuo1, ZHANG RenLiang1 #br#   

  1. 1Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081; 2Cultivated Land Quality Monitoring and Protection, Ministry of Agriculture and Rural Affairs, Beijing 100125; 3Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry Sciences，Yinchuan 750002；4National Agro-Tech Extension and Service Center, Beijing 100125
  • Published:2023-03-16

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Abstract: 【Objective】To clarify the characteristics and influencing factors of soil particle composition in Ningxia, and provide scientific reference for local land use and agricultural production planning.【Method】Based on the soil particle composition test data at 114 sites, the effects of environmental factors on soil particle composition, the statistical characteristics of soil particle composition, soil texture type, particle size of soil control layer, and the spatial distribution characteristics of soil particle composition in Ningxia were studied.【Result】(1) The contents of sand, silt and clay in Ningxia soil are 2.4%-97.2%, 0.8%-86.0% and 0.7%-43.3% respectively, and the average contents are 34.9%, 49.6% and 15.5% respectively; Soil texture is mainly composed of silty loam (46.51%), sandy loam (17.61%) and loam (13.29%), and the variation of soil texture types is mainly attributed to the change of sand and silt content. (2) A number of environmental factors jointly affect the soil particle composition in Ningxia, and the influential factors are geomorphic factors, parent material type factors, small topographic factors, thermal factors, soil type factors, land use type factors and wind speed factors in turn from large to small. (3) There are 11 types of particle sizes in the control interval, among which loamy (46.5%), clay (19.3%) and sandy (16.7%) are the main ones. (4) It is difficult to develop argic horizon in Ningxia. Among 114 sections, 26 clay particles are consistent with cohesive layer, but only 2 are exact argic horizon. (5) Siltigic epipedon of Ningxia produced obvious texture differentation.【Conclusion】The soil particle composition in Ningxia is mainly sand and silt, landform and parent material are the most important factors affecting the particle composition.


Key words: soil particle composition, factor analysis, soil texture, diagnosis of argic horizon, siltigic epipedon, Ningxia

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