论文部分内容阅读
本文应用顺序脱胶法,对砖红壤、赤红壤和红壤在不同利用方式下的水稳性团聚体的有机和无机胶结物组成进行了分析研究。水稳性团聚体共分>5,3—1,1—0.5和<0.25毫米四级。结果表明,红壤开垦后随着粘粒活度的增加和无机胶结物含量的降低,土壤团聚体的水稳性和土壤结构系数逐渐降低。但是,一旦采用合理的施肥和管理方法,这些物理参数又会逐步恢复和增加。此外,还研究了土壤结构稳定性与土壤地带性的关系。作者认为在中亚热带的红壤上施用有机物料以增强它的结构稳定性比热带砖红壤上施用更为重要。
In this paper, sequential degumming was used to study the composition of organic and inorganic cements in water-stable aggregates of brick red soil, latosolic red soil and red soil under different utilization modes. Water-stable aggregates are divided into four classes:> 5,3-1,1-0.5 and <0.25mm. The results showed that with the increase of clay activity and the decrease of inorganic cement content after the reclamation of red soil, the water stability and soil structure coefficient of soil aggregates gradually decreased. However, these physical parameters are gradually restored and increased once rational fertilization and management practices are in place. In addition, the relationship between soil structure stability and soil zonality was also studied. The authors believe that the application of organic materials to the red soils of the subtropics to enhance their structural stability is more important than the application of tropical brick red soils.