植物篱对紫色土区坡地土壤可蚀性变化影响  

Effects of Hedgerow to the Soil Erodibility Changes on Sloping Farmland in Purple Soil Area

作　　者：黄巍[1] 何丙辉[1] 马云[1] 何建林[1] 谌芸[1] 吴咏 向明辉 

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 [2]遂宁市安居区水土保持办公室,四川遂宁629006 [3]遂宁水土保持试验站,四川遂宁629006

出　　处：《亚热带水土保持》2012年第1期7-12,25,共7页Subtropical Soil and Water Conservation

基　　金：国家自然科学基金(40971166);国家科技支撑计划重点项目(2008BAD98B01)资助;西南大学生态学重点学科"211工程"建设项目

摘　　要：基于土壤分形维数及EPIC模型,研究紫色土区坡耕地不同土地利用方式下定植新银合欢植物篱对坡面土壤分形特征及可蚀性的影响作用。结果表明:定植植物篱能提高坡面土壤粘粒含量,对坡面小区土壤整体的可蚀性没有明显影响。土壤分形维数与砂粒、粉粒含量呈负相关,与粘粒含量呈正相关;土壤可蚀性K值与粉粒含量呈极显著的正相关,相关系数为0.957;与分形维数、砂粒含量、粘粒含量及有机碳含量呈负相关,相关系数分别为:-0.589,-0.668,-0.603,-0.286。On the bases of the fractal dimension and EPIC model, it is studied the effect of planting L. leucocephala hedgerows on soil fraetal feature and soil erodibility on sloping cropland of Purple Soil Area. The results show that, the plantation of hedgerows may increase the content of soil clay on the slope while has no significant impact on the erodibility of the whole soil on the slope plots. There was a positive influence on soil organic matter accumulation on slope farmland plots by planting the hedgerows. Soil fractal dimension was correlated negatively with sand and silt particles, and positively with clay particles. There was a significant positive correlation between soil erodibility K and soil silt particles content, with the correlation coefficient of 0.957. There was a negative correlation between soil erodibility K and fraetal dimension of soil particles, soil sand particles content, soil clay particles content and OC content, with the correlation coefficient of - 0. 589, - 0. 668, - 0. 603, and - 0.286 respectively.

关 键 词：植物篱 分形维数 土壤可蚀性 机械组成 

分 类 号：S158.5[农业科学—土壤学] S152.3[农业科学—农业基础科学]