Analysis Threshold Value of Ecological Water Requirement For Vegetation Restoration On Northern Grassland

摘要

Starting from strengthening ecological construction and management of pastoral areas of grassland, aiming at current ecological water demand of natural grassland under the condition of lacking irrigation and agriculture and forestry measures, this paper has studied the quantitative relation between natural grassland's water demand and rainfall, soil water, grassland vegetation coverage and biomass with various types of grassland in Inner Mongolia as targets and through surveys, experiments and other scientific approaches. Then, it has established calculation methods of natural grassland with utilizable amounts of soil water and average ecological water consumption of grassland as basic parameters to determine to reach a certain level of ecology, water demand threshold range of natural grassland for maintaining ecological balance and achieving expectant function and provide technological support for strengthening water and soil conservation of pastoral areas of grassland and recovering and improving ecological environment of grassland.