农业现代化研究2011，Vol.32Issue(2)：226-229,4.
生态措施对亚热带丘陵区紫色土水土保持效应及机理
Effects and Mechanism of Ecological Practices on Soil and Water Conservation for Purple Soils in Subtropical Hilly Region, China
摘要
Abstract
Purple soils developed from sandstone were selected to study effects and mechanism of various ecological practices on runoffcoefficient and soil erosive modulus over different slope in subtropical hilly region, China. The results indicated that, compared to the corresponding bare fallow land, the soil erosion modulus for the lands of terrace cultivation, contour-cultivation, bayberry and grass recovery with a 5° slope decreased by 10％, 18％, 37％ and 94％; the nmoff coefficient and soil erosive modulus for lands of terrace cultivation, locust, maple and jujube wood with a 10°slope decreased by 7％-60％ and 15％-86％, whilst increased by 30％ and 77％ for vine tea land with removal vegetation below; the corresponding values for grass restoration land combining with check dam decreased by 30％ and 40％,respectively. The conversion from slope cultivation to terrace, contour-cultivation, developments of economic or soil and water conservation forest could reduce soil and water erosion below 10° slope, but measures to reduce disturbances on the soil and increase the immediate soil coverage should be practiced; while growing grass or vegetation restoration plus check dam, could prevent soil and water erosion in a high slope (15° ). Erosive modulus of the purple soils was exponentially correlative to the runoff coefficient (R2=0.73-0.98, P＜0.01), implying that runoffcoefficient can be used to indicate and evaluate the soil erosion for such soil.关键词
紫色土/径流系数/土壤侵蚀模数/生态措施/亚热带丘陵区Key words
purple soils/ runoff coefficient/ soil erosive modulus/ ecological practices/ subtropical hilly region分类
农业科技引用本文复制引用
王志伟,朱捍华..生态措施对亚热带丘陵区紫色土水土保持效应及机理[J].农业现代化研究,2011,32(2):226-229,4.基金项目
近尾洲水电厂坝下护坡修复工程(编号:TJ201005006). （编号:TJ201005006）
