水土保持学报2017，Vol.31Issue(4)：172-177,6.DOI:10.13870/j.cnki.stbcxb.2017.04.028
不同放牧强度下土壤侵蚀对典型草原土壤有机碳的影响
Effects of Soil Erosion on the Soil Organic Carbon of Typical Steep Under Different Grazing Intensities
摘要
Abstract
Carbon storage and carbon loss were the serious issues in the soil erosion region of typical steppe.By field investigation and simulated rainfall,effects of grazing intensities on the soil erosion,soil organic carbon storage and carbon loss of typical steppe in Inner Mongolia were studied.The results showed that:(1) The grazing intensity had a great effect on the surface soil organic carbon,and the organic carbon storage increased firstly and then decreased,the ranking was the light grazing＞the no grazing＞the moderate grazing＞ the heavy grazing;the soil organic carbon storage in 0-40 cm soil layer under different grazing intensity changed significantly and showed a vertical decreasing trend.(2) PFTs were most important,followed by N soil,and finally climate the soil erosion was mainly affected by rainfall intensity,followed by slope,and finally grazing intensity.(3) As for the same slope,the rainfall intensity had a greater influence on soil organic carbon loss than the grazing intensity;the soil erosion and soil organic carbon loss increased with the increasing rainfall intensity and grazing intensity.The findings indicate that it is necessary to control grazing intensity for soil erosion for soil erosion in typical steep.关键词
典型草原/降雨模拟/土壤有机碳/土壤侵蚀Key words
typical steppe/simulated rainfall/soil organic carbon/soil erosion分类
农业科技引用本文复制引用
兰瑞君,郭建英,尹忠东,李锦荣,张铁钢..不同放牧强度下土壤侵蚀对典型草原土壤有机碳的影响[J].水土保持学报,2017,31(4):172-177,6.基金项目
国家自然科学基金项目(41301302) （41301302）
