摘要
从水稳性、力稳性和化学稳定性3方面研究了紫色土团聚体稳定性和抗蚀性特征及内在机理,结果表明:不同利用方式土壤>3mm,>1mm,>0.25mm水稳性团聚体的含量均表现为荒草地>林地>园地>耕地,结构破坏率表现为耕地>园地>林地>荒草地;力稳性参数"原始稳定性"表现出荒草地>林地>园地>耕地,"崩解速率"表现为耕地>园地>林地>荒草地,不同利用方式土壤团聚体力稳性表现为荒草地>林地>园地>耕地;蓬莱镇组、遂宁组和沙溪庙组3种母质发育的土壤,遂宁组母质发育土壤抗蚀性最强,不同利用方式抗蚀强弱表现为荒草地>林地>园地>耕地;土壤有机质和粘粒含量显著地影响土壤团聚体的"原始稳定性"和"崩解速率",是影响土壤团聚体抗蚀性的主要内在因素。
Aggregates stability,erosionresistant character and inherence mechanism of purple soil were studied through three aspect which are water stability, mechanics stability and chemical stability. Results showed that the contents of >3mm, >1mm, >0.25mm waterstable aggregates all changed in the following order:wildgrassland>woodland>garden plot>farmland, the ratio of structure damage in the following order: farmland>garden plot>woodland>wildgrassland. Mechanics stability parameter 'original stability' in the following order: wildgrassland>woodland>garden plot>farmland, 'collapse velocity' in the following order: farmland>garden plot>woodland>wildgrassland, aggregates mechanics stability under different land use in the following order: wildgrassland>woodland>garden plot>farmland. Erosionresistant of soil aggregate develop from Suining group is the best among Penglai stratum, Suining and Shaxi temple. Soil aggregate erosion under different utilization pattern changed in the following order: wildgrassland>woodland>garden plot>farmland.The soil organic and clay influence remarkably the soil aggregate 'original stability' and 'collapse velocity', they are the mostly intrinsic factor to soil aggregate erosion.
出处
《水土保持学报》
CSCD
北大核心
2003年第2期20-23,27,共5页
Journal of Soil and Water Conservation
基金
教育部博士点基金(2000062505)资助
中国科学院知识创新工程(KZCX-2-SW-319-3)项目
