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土体有机重构是土地工程的核心。本文从颗粒需求、剖面层级重构、土体化学特性和营养保障四个关键要素着手,并以韩城下峪口土地整治项目为例,阐述了其在土体有机重构中的具体应用。结果表明:(1)在选择重构材料时,要优先考虑土体的颗粒需求;(2)在土体剖面层级重构中,要充分考虑当地土体、水文条件,同时以目标作物为导向,设计合理的剖面结构;(3)重构过程中,需考虑重构材料的安全性;(4)土体有机重构后,需要根据目标作物需求,调节土体成分,为生物提供营养保障。
Soil organic reconstruction is the core of land engineering. In this paper, four key elements of particle demand, profile level reconstruction, soil chemical properties and nutrition security are discussed. Taking Hancheng Xiayukou land remediation project as an example, the paper expounds its concrete application in soil organic reconstruction. The results show that: (1) In the selection of reconstructed materials, priority should be given to the grain requirements of the soil; (2) In the hierarchical reconstruction of the soil profile, the local soil and hydrological conditions should be fully taken into consideration while the target crops should be the guide (3) In the process of reconstruction, the safety of reconstituted materials should be considered; (4) After soil organic reconstruction, the soil components need to be adjusted according to the requirements of the target crops to provide nutrition support for the organisms .