紫色土区坡耕地不同种植模式对土壤渗透性的影响  

Effects of different planting modes on the soil permeability of sloping farmlands in purple soil area

作　　者：李建兴[1] 何丙辉[1] 梅雪梅[1] 梁艳玲[1] 熊建[1] 

机构地区：[1]西南大学资源环境学院三峡库区生态环境教育部重点实验室,重庆400715

出　　处：《应用生态学报》2013年第3期725-731,共7页Chinese Journal of Applied Ecology

基　　金：国家科技支撑计划项目(2011BAD31B03);国家自然科学基金项目(40971166;41271291);西南大学资源环境学院大学生科技创新"光炯"培育项目(20120105)资助

摘　　要：以裸地为对照,研究紫色土区坡耕地不同种植模式对土壤渗透性的影响.结果表明:6种种植模式土壤渗透性表现为枇杷>柠檬>香根草植物篱+玉米>新银合欢植物篱+玉米>黄花>玉米>裸地;各种植模式土壤渗透性均随土壤深度的增加而降低,土壤入渗特征值均表现为初始入渗率>平均渗透率>稳定入渗率;土壤渗透性与土壤非毛管孔隙、总孔隙度、初始含水率、有机质含量和土壤持水量呈显著正相关,与土壤容重呈显著负相关;通用经验模型对各种植模式土壤入渗过程的拟合效果最好,而Kostiakov方程不适于描述该流域土壤水分的入渗过程.Taking bare land as the control, this paper studied the effects of different planting modes on the soil permeability of sloping farmlands in purple soil area. For the test six planting modes, the soil permeability was in the order of Eriobotrya japonica 〉 Citrus limon 〉 Vetiveria zizanioides hedgerows ＋corn〉Leucaena leucocephala hedgerows ＋ corn 〉HemerocaUis fulva 〉 corn 〉 bare land, and decreased with increasing depth. The eigenvalues of soil infiltration were in the order of initial infil- tration rate〉average infiltration rate 〉 stable infiltration r^ite. The soil permeability had significant positive linear correlations with soil total porosity, non-capillary porosity, initial moisture content, water holding capacity, and organic matter content, and significant negative linear correlation with soil bulk density. The common empirical infiltration model could well fit the soil moisture infiltration processes under the six planting modes, while the Kostiakov equation could not.

关 键 词：坡耕地 植物篱 土壤入渗 通用经验模型 紫色土区 

分 类 号：S157.1[农业科学—土壤学]