Research Of Temporal And Spatial Variability Of Soil Nutrient In Yulin

Soil nutrient has spatial heterogeneity,master temporal and spatial variability of soil characteristics of cultivated land protection in China, the rational management of land, scientific farming has important significance. Yulin city is the most important resource type cityin Shaanxi Province and even the whole country,with the exploitation of resources in recent years.TheYulin area of spatio temporal variability of Soil Nutrients Based on research, to explore the distribution characteristics and change tendency of Yulin area of soil nutrient, provide the basis for the Yulin agricultural production and soil conservation.This paper combined IDRISI17.0 with arcgis10.0, in the grasp of Yulin region in the 1980 s soil nutrient level map and 2010 Shaanxi Provincial Department of agriculture land measuring fertilizer station provides the soil nutrient sample data based on, focuses on analysis of the spatial and temporal variability of soil total nitrogen, available phosphorus. Spatial and temporal variability of Yulin area of soil nitrogen and available phosphorus were similar, in time variability exhibited improved soil nutrient level, improve soil quality, various grades of area distribution are changed. On the spatial variability of performance was higher than that of the six counties of South and North County, six soil nutrient level, good soil quality characteristics and two regional soil quality have variable trend. Yulin area soil nutrients showed a soil nutrient spatial variability was mainly due to the effect of surface composition variations and human activities.