鄂尔多斯高原砒砂岩区林草植被承载潜力研究

The Erdos Plateau is a typical distribution area of the soft rock area,with serious soil and water loss.Land degradation continues to threaten the ecological environment security of the Yellow River basin,which must be discussed and solved in watershed management.In this study,the soft rock area of Erdos Plateau was taken as the research area,and the MODIS13Q1 vegetation index and digital elevation data were used as the data source.The measured aboveground biomass sample points and vegetation coverage were linearly simulated to obtain the spatial distribution of aboveground biomass,and then it was divided into three types of soil-covered sandstone area,sand-covered sandstone area and bare sandston e area.Topographic effect analysis is carried out with elevation,slope and slope direction as indicators.Combined with vegetation coverage and aboveground biomass analysis,the ecological carrying capacity thresholds of different units were obtained,and then the ecological carrying potential was explored.The results showed that the above-ground biomass of sore-covered soft rock area,sand-covered soft rock area and bare soft rock area in the study area was 1099.67 million tons,465.62 million tons,and 484.47 million tons,respectively.Compared with the actual above-ground biomass it was found that the developed amount of each type accounted for 77.71%,74.34%,and 66.26%of its development potential,which still had great potential.