不同生物治理模式下红壤抗蚀性变化特征及其影响因素  

Changes and Influences of Red-soil Anti-erodibility under Different Biological Measures

作　　者：陈建威[1] 张展羽[1] 杨洁 陈晓安 唐丹[1] 

机构地区：[1]河海大学水利水电学院,南京210098 [2]江西省水土保持科学研究院,南昌330045

出　　处：《中国农村水利水电》2017年第5期129-132,138,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金(41401312)

摘　　要：生物治理措施是土壤侵蚀防治3大措施之一,而土壤抗蚀性是评定土壤抵抗侵蚀能力的重要参数,以第四纪红壤为对象,对水保林、林草结合、果林清耕、撂荒裸地4种治理模式下土壤抗蚀性进行了研究,结果表明:(1)不同生物治理模式下土壤抗蚀性差异明显,土壤抗蚀指数表现为水保林>林草结合>果林清耕>撂荒裸地,且同一治理措施上层土壤抗蚀性优于下层土壤。(2)土壤抗蚀指数随浸水时间的增加而减小,两者呈三次函数关系。(3)运用主成分分析方法,从13个土壤抗蚀性影响因子中提取出3个主成分,建立土壤抗蚀性综合评价模型,在不同生物治理措施下适用良好。Biological measure is one of the three major ones for the soil and water conservation and soil anti-erodibility is one of the important parameters for evaluating the ability of soil resistance to soil erosion. This paper studies the anti-erodibility of four different biological measures of red soil including soil and water conservation, combing forests with grass, pure fruit forest and bare abandoned land. The results show that ： （1） There is significant difference in anti-erodibility of different biological measures. The order of soil anti-erodibility index followed that soil and water conservation〉 combing forest with grass〉 pure fruit forest 〉 bare abandoned land, and the anti-erodibility of upper layer was better than lower layer for the same measure. （2） The soil anti-erodibility index decreases with the increase in the immersion time going. It had cubic polynomial function relation with immersion time. （3） Three principal component of soil anti-erodibility can be determined from thirteen anti-erodibility indices by the method of principal component analysis. Then the comprehensive evaluation model of anti-erodibility was found, which was applied well under different biological measures.

关 键 词：抗蚀性 生物治理 红壤 主成分分析 

分 类 号：TV93[水利工程—水利水电工程] S157.1[农业科学—土壤学]