水田自然免耕土壤结构状况研究

本文研究了自然免耕土壤的水稳性团聚体、微团聚体和土壤结构的稳定性及其与水分的关系。结果表明:自然免耕促进了>25mm的水稳性团聚体形成,团聚水平、团聚度和结构系数增加,结构稳定性提高,土壤容重稳定。因此,浸润水分有利于土壤结构的形成和稳定。

STUDY ON SOIL STRUCTURE STATES IN PADDY FIELD UNDER SOIL VIRGINIZATION

Waterstable aggregates, microaggregates and structure stability in relationships with water were researched. As compared with the traditional tillage methods, the result shows that the soil virginization method promot es the formation of waterstable aggregate of>0.25mm,iucreases the aggregation level, degree of aggregation and structural coefficient,and the stability of soil structure and bluk density.Consequently, infiltration water is favorable to the soil structure genesis and stability.