The Effects of Land Uses on Purplish Soil Erosion in Hilly Area of Sichuan Province, China

In order to evaluate the soil erosion rate for different land uses and make recommendations on land-use alternatives for erosion control in hilly and mountain areas on a Purplish soil (Regosols in FAO taxonomy), experimental data were obtained from three continuously monitored sites located at Yanting,Nanbu and Pengxi of Sichuan province. The data showed that the rank of erosion rate is farmland ＞unfenced grassland ＞ fenced grassland ＞ forestland.The erosion rate of farmland was more than 3 times higher than that of forestland and fenced grassland,indicating that restricting human activity is crucial for over-erosion. The erodibility was higher at the initial period of rainy season for all the three types of land use. The erosion rates of fenced grassland and mature afforestation land were not proportional to rainfall intensity because these land uses changed impact energy of the rainfall. This research showed that restricting human activity, intensifying the management of initial period of rainy season, and increasing the cover rate of land surface are the three major measures for soil erosion prevention. It is recommended that farmers should cease cultivation on farmland at the top of hills and steep slope land return those lands back to grassland or forestland.

作 者： LIU Gangcai ZHANG Jianhui TIAN Guanglong Wei Chaofu   作者單位： LIU Gangcai(College of Resources and Environment,Southwest Agriculture University,Chongqing 400716,China;Institute of Mountain Hazard and Environment,ChineseAcademy of Science & Water Resources Ministry,P. O. Box 417,Chengdu,Sichuan 610041,China)

ZHANG Jianhui(Institute of Mountain Hazard and Environment,ChineseAcademy of Science & Water Resources Ministry,P. O. Box 417,Chengdu,Sichuan 610041,China)

TIAN Guanglong(Research and Development Department,Metropolitan Water Reclamation District of Greater Chicago,6001 W.Pershing Road,Cicero,IL 60804-4112,USA)

Wei Chaofu(College of Resources and Environment,Southwest Agriculture University,Chongqing 400716,China) 

刊 名： 山地科學學報（英文版）  SCI 英文刊名： JOURNAL OF MOUNTAIN SCIENCE  年，卷(期)： 2005 2(1)  分類號：   關鍵詞： Soil erosion   land use   hilly area   purplish soil  

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