摘要
通过野外人工模拟降雨试验,研究了第四纪红粘土、泥质页岩和花岗岩三种母质发育的红壤团聚体稳定性对土壤坡面侵蚀和侵蚀泥沙特性的影响.结果表明：坡面土壤侵蚀量和径流强度与土壤团聚体稳定性存在显著负相关关系,且不同团聚体稳定性指标与二者相关程度存在差异,其中湿筛团聚体平均重量直径（MWD）和》0.25 mm水稳性团聚体含量（WSA0.25）与侵蚀量和径流强度相关程度最高,快速湿润中1～0.5 mm团聚体和湿润振荡中2～1 mm团聚体标准化平均重量直径（NMWD）与二者的相关性也达到了显著;泥沙粒径与湿筛MWD和WSA0.25之间相关关系（偏相关分析）呈显著正相关（r=0.8283^＊,r=0.8209^＊）;快速湿润中1～0.5 mm团聚体和湿润振荡中2～1 mm团聚体的NMWD与泥沙粒径也存在较好正相关关系（r=0.7458,r=0.6859）.泥沙粒径和水流功率在本研究中未表现出较好相关性（r=-0.1852）.
Relationships of soil aggregates stability with soil loss, runoff and sediment characteristics were studied under simulated rainfall in red soils derived from Quaternaryclay, Shale and Granite. Results show that soil loss and runoff rate were significantly related to aggregate stability, but the relationship varied with the aggregate stability indices. Among them, mean weight diameter with wet-sieving method and content of water stable aggregates lager than 0.25 mm were the highest in relativity. As for I_e Bissonnais＇ method, soil loss and mean runoff rate were also significantly correlated with the normalized mean weight di- ameter of aggregates （1 - 0.5 mm in size） in the fast wetting treatment and aggregates （2 - 1 mm in size） in the wet stirring treatment. A significant relationship （ partial correlation analysis） was found between particle size of sediment and mean weight diameter（ r = 0.8 283 ^＊ ） ,water stable aggregates 〉 0.25 mm（ r = 0.8 209^＊ ）. In Le Bissonnais＇ method,the NMWD of aggregates （1 - 0.5 mm） in the fast wetting treatment and aggregates （2 - 1 mm） in the wet stirring treatment showed close but not significant relationship with particle size of sediments （ r = 0.7 458, r = 0.6 859）. However, the stream power and particle size of sediments did not show much （ r = - 0.1 852） in this study.
出处
《土壤学报》
CAS
CSCD
北大核心
2007年第4期577-583,共7页
Acta Pedologica Sinica
基金
国家自然科学基金项目(40401034和40501040)资助
关键词
红壤
团聚体
坡面侵蚀
泥沙粒径
Red soils
Aggregate
Hillslope erosion
Sediment characteristics
作者简介
闫峰陵（1980～）,男,博士研究生,研究方向为土壤侵蚀机理
史志华 通讯作者,E-mail：pengshi@mail.hzau.edu.cn
