Kerulen Downstream Regions Of Different Pasture Utilization Ways Of Physical Properties Of Soil And Vegetation Characteristics Comparative Study

Kerulen River basin grassland in the eastern Mongolia plateau, is an important ecological barrier in north temperate grassland. In the climate change and human activities under the dual impact of the area grassland ecological system different degree of degradation. In this paper, typical steppe kerulen downstream area as the research object, in the traditional nomadic as control, In this paper, Kerulen typical steppe downstream area as the research object, in the traditional nomadic as control, research explores the soil physical properties and vegetation characteristics in the fenced grassland utilization ways. The results showed that:1. In the different grassland utilization ways, Soil bulk density, density, hardness, sand content is:Nomadic<Rotational grazing<Mowing. The nomadic areas (0～10cm) of soil moisture content, porosity, clay content were significantly higher than that of rotational grazing and pasture area, the result for, Rotational Grazing<Mowing<Nomadic.2. The nomadic areas, grazing, mowing vegetation height had significant difference, size is Rotational Grazing<Mowing<Nomadic. Mowing coverage and nomadic areas, grazing had significant difference, size is Rotational Grazing<Nomadic<Mowing. Rotation grazing plant importance value and nomadic pastoral, wheel there is a significant difference, size is Rotational Grazing<Mowing<Nomadic.3. In the grassland under different utilization modes, photosynthetic pigment content is Mowing<Rotational Grazing<Nomadic.4.The plant nutrient content analysis results, The nomadic area,rotational grazing area and mowing is Plant nitrogen content that there were significant differences among, Plant nitrogen content is Mowing<Rotational Grazing<Nomadic. In the summer camp and winter camp, the nomadic area, rotational grazing area and mowing is Plant Phosphorus content that there were significant differences among, Plant phosphorus content is Mowing<Rotational Grazing<Nomadic. In the every camp, the nomadic area, rotational grazing area and mowing is plant potassium content that there were significant differences among, Plant phosphorus content is Mowing<Rotational Grazing <Nomadic.5. The soil physics characters and vegetation characteristics were the result of correlation analysis for:Soil moisture content、porosity、silt、fine silt、soil clay have positive correlation with plant community characteristics. Soil bulk density, density, hardness, sand have negative correlation with plant community characteristics.