Analyze On Spacial Variability Character Of Soil Organic Carbon Of Urumqi Up River Based On DEM

Based on Geostatistical methods and Soil types methods, we researches three-dimensional distribution of soil organic carbon in Urumqi Up River and the total reserves of soil organic carbon..In the calculation of reserves, the application of three-dimensional analysis capabilities Arcgis, will be based on the data surface area, reducing the terrain as the area generated by the error. DEM obtained by the Urumqi River upstream of soil organic carbon in three-dimensional distribution of visual accuracy than previous studies. Main conclusions are as follows:1. Through calculation of the soil organic carbon total 74,529,800 tons. Subalpine meadow soil organic carbon storage in the soil the most, 26,602,200 tons. Followed by gray-brown forest soil, was 19,746,500 tons. Again for the alpine meadow soil, mountain chernozem and chestnut soil, the soil organic carbon content are very similar, were 6.995 million tons, 8.7898 million tons, 7.7837 million tons. The lowest content of calcium for the mountain brown soil, as 4,612,600 tons.2. Vertical distribution of soil organic carbon: soil surface directly receive from plants roots, stems, leaves and fruit and other organic debris in the supply of humus, which is why the content of soil organic carbon more. The leaching layer deposition layer and the whole ecosystem relatively close, relatively high soil organic carbon content. Because the soil parent material is relatively stable, parent material farther away from the terrestrial ecosystems, so the lowest soil organic carbon content. Therefore, the distribution of soil organic carbon by surface leaching layer, layer deposition, parent material, layer by layer reduction.3. Distribution of soil organic carbon levels: along the Urumqi River, altitude decreased, the overall vegetation coverage was progressively decreased, this macro determines the distribution of soil organic carbon has a similar trend. View from the weather conditions, mountainous areas than in low-lying, humid climate, short dry season, and the average low temperature is more conducive to the accumulation of soil organic carbon, soil organic carbon levels so the whole mountain is higher than the lower elevation areas. In the mountains, fine soil texture, and more partial sticky or sticky soil is conducive to the accumulation of organic carbon, and into organic carbon density is higher. In contrast, lower elevation areas, sandy or sandy loam texture quality bias is not conducive to the accumulation of soil organic carbon, making the area a study area, low in organic carbon content.