草甸草原植被利用强度对水土流失影响的研究  

INFLUENCE OF UTILIZATION INTENSITY OF VEGETATION ON WATER EROSION IN MEADOW STEPPE

作　　者：许志信[1] 张晓明[1] 白飞[1] 昭和斯图[1] 

机构地区：[1]内蒙古农业大学生态环境学院,呼和浩特010018

出　　处：《内蒙古农业大学学报（自然科学版）》2001年第1期68-73,共6页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：国家自然科学基金资助项目!(39860 0 62 )

摘　　要：1999年和 2 0 0 0年 5月～ 9月在锡林郭勒盟东乌旗贺斯格乌拉牧场进行了草原植被不同利用强度对水土流失影响的研究。试验表明 ,草原植被的利用强度与水土流失密切相关。例如 2 0 0 0年 9月 12日的降雨量为17.5 m m,对照区的清水径流量为 842 7.70 m3/ km2 ,土壤侵蚀量为 8.0 3t/ km2 ;轻度利用区分别为 942 6 .41m3/ km2和 2 4.42 t/ km2 ;中度利用区分别为 12 16 2 .5 9m3/ km2和 6 3.88t/ km2 ;重度利用区分别为 136 49.2 2 m3/ km2和16 0 .0 4t/ km2。除植被因素外 ,降雨量、降雨强度以及地形都影响水土流失的多少。The influence of utilization of grassland vegetation on water and soil losses was studied in the Hesigewula Ranch,Dongwu Banner,Xilinguole League,Inner Mongolia from May to September 1999 and 2000.The results showed that the utilization of grassland vegetation was related with water erosoin.Precipitation was 17.5mm on 12 September,2000,and runoff averaged 8 427.70m 3/km 2,soil loss was 8.03 t/km 2 in control plot,runoff and soil loss were 9 426.41 m 3/km 2 and 24.42t/km 2 in light utilization plot, 12 162.59 m 3/km 2 and 63.88t/km 2 in moderate utilization plot,13 649.22 m 3/km 2 and 160.04t/km 2 in heavy utilization plot,respectively.In addition to vegetation condition,water erosion was also affected by precipitation,rainfall intensity and slope.

关 键 词：草甸草原 植物利用强度 水土流失 

分 类 号：S812[农业科学—草业科学] S157.1[农业科学—畜牧学]