水土保持学报2013，Vol.27Issue(4)：67-72,77,7.
贵州省石漠化综合治理人工种草对土壤侵蚀的影响
Effect of Planting Grass on Soil Erosion in Karst Demonstration Areas of Rocky Desertification Integrated Rehabilitation in Guizhou Province
摘要
Abstract
By means of fields investigation and lab experiments,soil physical and chemical characteristics,shear strength and soil scouring modulus with different soil depth under planting grassland,nature grassland and slope farmland in Xiaotianlong and Mengzhai small watersheds were studied.The result showed that:(1) After planting grass,it was effective to reduce soil bulk density,improve soil porosity and SWC in slope farmland.Soil bulk density reduced by 0.07％ in 0-10 cm soil layer,17.83％ in 10-20 cm soil layer and 15.08％ in 20-30 cm soil layer.Soil porosity improved by 0.01％ in 0-10 cm soil layer,16.06％ in 10-20 cm soil layer and 13.26％ in 20-30 cm soil layer.SWC improved by 43.45％ in 0-10 cm soil layer,43.61％ in 10-20 cm soil layer and 30.46％ in 20-30 cm soil layer.(2)After planting grass,it was effective to improve soil organic matter content in slope farmland and soil organic matter content increased by 77.27％.Soil organic matter contents increased by 48.06％,85.58％,107.78％ in 0-10 cm,10-20 cm and 20-30 cm soil layer,respectively.The soil total N content and soil total P content increased by 42.64％ and 45.24 ％,the soil total K content decreased by 43.28％.(3)The shear strength of planting and nature grassland were 2.08,2.06 times than that of slope farmland,so planting and nature grassland showed a good soil anti-erosion ability than slope farmland.Slope farmland soil in 0-10 cm layer showed higher soil scouring modulus,which decreased with increasing soil depth.In contrast,planting and nature grassland soil in 0-10 cm layer showed lower soil scouring modulus,which increased with increasing soil depth.(4)Compared with slope farmland soil,planting grassland had lower soil bulk density,higher soil porosity and shear strength.Therefore,it had an obvious benefit for getting water and soil conservation after planting grass in slope farmland.关键词
贵州省/石漠化综合治理/土壤理化性质/抗剪强度/崩解速率/土壤侵蚀Key words
Guizhou province/ Karst demonstration areas of rocky desertification integrated rehabilitation/soil physical and chemical characteristics/ shear strength/ soil scouring modulus/ soil erosion分类
农业科技引用本文复制引用
孙泉忠,刘瑞禄,陈菊艳,张云平..贵州省石漠化综合治理人工种草对土壤侵蚀的影响[J].水土保持学报,2013,27(4):67-72,77,7.基金项目
贵州省水利厅科技项目"石漠化治理小流域种草养畜水土保持效益研究"(KT201104) （KT201104）
贵州省水利厅科技项目"贵州省石漠化治理工程农林复合经营模式研究"(KT201201) （KT201201）
贵州省石漠化综合治理工程监测项目 （）
