应用生态学报2013，Vol.24Issue(1)：122-128,7.
植物篱-农作坡地土壤团聚体组成和稳定性特征
Composition and stability of soil aggregates in hedgerow-crop slope land
摘要
Abstract
Based on a long-term experiment of using hedgerow to control soil and water loss, this paper studied the composition and stability of soil aggregates in a hedgerow-crop slope land. Com-pared with those under routine contour cropping, the contents of >0. 25 mm soil mechanical-stable and water-stable aggregates under the complex mode hedgerow-crop increased significantly by 13. 3%-16. 1% and 37. 8% -55. 6% , respectively. Under the complex mode, the contents of >0.25 mm soil water-stable aggregates on each slope position increased obviously, and the status of >0. 25 mm soil water-stable aggregates being relatively rich at low slope and poor at top slope was improved. Planting hedgerow could significantly increase the mean mass diameter and geometric mean diameter of soil aggregates, decrease the fractal dimension of soil aggregates and the destruc-tion rate of >0. 25 mm soil aggregates, and thus, increase the stability and erosion-resistance of soil aggregates in slope cropland. No significant effects of slope and hedgerow types were observed on the composition, stability and distribution of soil aggregates.关键词
植物篱/土壤团聚体/土壤结构破坏率/坡度/水土流失Key words
hedgerow/soil aggregates/destruction rate of soil structure/slope/soil and water loss分类
农业科技引用本文复制引用
蒲玉琳,林超文,谢德体,魏朝富,倪九派..植物篱-农作坡地土壤团聚体组成和稳定性特征[J].应用生态学报,2013,24(1):122-128,7.基金项目
"十二五"国家水专项(2012ZX07104-003)、重庆市工程技术研究中心建设项目(CSTC,2010CB7008)、国家自然科学基金项目(41101298)和西南大学生态学重点学科"211工程"经费资助. （2012ZX07104-003）
