农田土壤压实过程及模型研究进展

农田土壤受到农业机械田间作业的影响发生压实板结,造成土壤孔隙率降低,容重和紧实度增大,限制水分入渗和根系生长,影响作物产量。随着我国农业机械化水平不断提高,土壤压实对农业可持续发展的影响引起了广泛的关注。本文通过文献调研,总结了土壤压实过程的国内外研究进展,对土壤压缩行为、压缩曲线与预固结压力的计算方法进行了梳理,综述了土壤压实机理和压实模型的发展历程和未来动向,可为推进农田土壤压实研究提供参考。

Processes and Modelling of Soil Compaction in Farmland: A Review

Soil compaction due to agricultural field traffic is a global problem, causing reduction in soil porosity with the limitation of water infiltration and root growth, affecting crop yields eventually. With the rapid development of cropland mechanization in China, soil compaction effect on sustainable development of agriculture has attracted great concerns. In order to provide a reference for further research, this paper reviewed the advances in understanding soil compaction process, introduced the methods of analyzing compression behavior, calculating pre-compression stress, the assumptions of mechanism, and discussed the functions of different modeling.