A Report on the Comprehensive Management on the Experiment Site of Huangjiaercha Watershedin Ningxia Hui Autonomous Region

摘要

On the base of the analysis of research status and development trend of small watershed management at home and abroad, this subject applied the ecology principle, the theory and method of economy and systematic engineering. Its purpose is the improvement of ecological environment, control of soil and water loss, the improvement of land productive capacity, realization of good benefit. Through the five-years' untiring efforts, the technique system of small watershed comprehensive management and artificial eco-economic system was established, and the experimental demonstration region of Huangjiaercha small watershed comprehensive management in Xiji county of Ningxia Hui Autonomous Region was built. According to the quantitative analysis of populationconsumption, resources and environment, we firstly put forward the method of the environmental human carrying capacity in the watershed. The amount of environmental human carrying capacity of the watershed is 128 per square kilometers under the simply having enough food and clothing level. The results indicated that watershed treatment effect was notable; grain yield per unit area was increased by 4. 2 times; the income per capita was increased by 2. 5 times; wood and grass cover area was raised from 1.7% to 61%; the soil loss is reduced by 95%.