The Study On The Speciality Of Grassland Resources In Keshiketeng

This paper takes remote sensing technology in combination of surface-truth field trip data to analyze the speciality and the nutritive value of grassland resources in Keshiketeng in 2008. Classification system of Keshiketeng grassland type is established and the informations of grassland speciality are taked from TM and MODIS satellite data to study the zonal distribution of grassland resources; The biomass models of grassland is established; The monitoring of grassland degradation is done based on the NDVI data; The paper has also done analysis of the nutritive speciality in Keshiketeng grassland and the main type of the nutrient in Keshiketeng grassland is classified. The data can be used as basic data for later dynamic detection. It can also provide theoretical basis for the sustainable use, protection and management of grassland resources in Keshiketeng.The main results showed as follows:1.The total grassland area of Keshiketeng Banner is 2063.60 ten thousand mu, the temperate steppe type is the most widely distributed in Keshiketeng. Compared to the date in 1988, there are two new sub-type which are the sandy temperate meadow-steppe sub-type and the wet lowland meadow sub-type.2.The biomass models of Keshiketeng grassland is established basd on MODIS -NDVI: y = 2493.46x - 1098.91(R2 = 0.68, p<0.001).3. The monitoring of grassland degradation was done which is based on the NDVI and surface-truth field trip data after the regression models of Keshiketeng grassland established which is based on the NDVI and surface-truth field trip data: y=187.94x-50.43(R2=0.72, p<0.001). The results of degradation analysis meet the requirements of the precition. Compared to the date in 1988, It is shown that Keshiketeng grassland has quite regional difference and has a representative degeneration trend from the eastern part to the western part.4. The crude protein supply of Sanguisorba officinalis,Carex pediformis,Stipa grandis type is the highest. The main type of the nutrient is CN type.