黄土丘陵区牧草篱对坡耕地土壤抗侵蚀性的影响  

Effects of Forage Hedgerows on Soil Erosion Resistance of Sloping Land in Loess Hilly Areas

作　　者：李聪会[1] 朱首军[1] 陈云明[2] 于萌 马笑[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨陵712100 [2]西北农林科技大学水土保持研究所,陕西杨陵712100 [3]新疆绿疆源生态工程有限责任公司,新疆乌鲁木齐830000

出　　处：《西北林学院学报》2013年第5期41-46,共6页Journal of Northwest Forestry University

基　　金："十二五"国家科技支撑计划(2011BAD31B05-02)

摘　　要：以苜蓿、红豆草2种牧草篱为研究对象,对黄土丘陵区坡耕地布设牧草篱前后及牧草篱形成初期草带内、带间坡耕地土壤物理性质、抗蚀性、抗冲性、抗剪性的差异及各相关性进行了研究。结果表明:1)牧草篱可以明显改善土壤容重、总孔隙度、饱和含水量、水稳性团聚体含量等物理性质;2)牧草篱影响下土壤抗蚀性、抗冲性提高,牧草篱带内土壤抗剪强度小于带间坡耕地;3)牧草篱系统内土壤抗冲系数与土壤容重呈负相关关系,与总孔隙度、饱和含水量、水稳性团聚体含量呈正相关;崩解速率与土壤容重成正相关,与总孔隙度、饱和含水量、水稳性团聚体含量呈负相关;土壤抗剪强度与土壤容重呈正相关(p<0.05),与总孔隙度、饱和含水量、水稳性团聚体呈负相关。Taking alfalfa and sainfoin as the main research objects, the soil physical properties, anti-erod ibility, anti-scourability and anti-shear strength in and between the forage hedgerows were tested before and after planting hedgerows. The correlations among these factors were also analyzed. The results were as follows. I） Forage hedgerows could significantly improve soil physical properties, including soil bulk, porosity, moisture content and the content of the water-stable aggregates. 2） Forage hedgerows could im prove the soil anti-erodibility, anti-scourability in sloping land, and anti-shear strength in forage hedger ows was smaller than that between them. 3） In forage hedgerow systems, soil anti-scourability was negatively correlated with soil bulk, and positively correlated with soil porosity, moisture content and the con-ent of the water-stable aggregates. Soil disintegration rate was positively correlated with soil bulk, and negatively correlated with soil porosity, moisture content and the content of the water-stable aggregates.

关 键 词：黄土丘陵区 坡耕地 牧草篱 土壤抗侵蚀性 

分 类 号：S714[农业科学—林学]