North Canal Downstream Wuqing Spatial Variability Of Soil Nutrients

In this study, extensive collection of Wuqing District land use soil type and the basic data on the basis of the six land use types and four soil sampling and field investigations, laboratory analysis and experiments,through land use on the statistical distribution of soil nutrients and soil properties on the sample analysis and descriptive statistics to statistical analysis, there are changes in the distribution of nutrients in the soil profile,Of different land use patterns in spatial variability of soil characteristics and the reasons for these variations produced, then the downstream response to the North Canal, under different land use laws of spatial variability of soil properties, land for the North Canal downstream allocation, rational use and development of science Provide the basis for agricultural policy.(1) Under different land use distribution of soil nutrients that Wuqing different land use on soil pH value of the surface and intensive manner illustrate the soil surface pH value is high, reflecting their greater impact on human activities; Illustrates the impact of organic farming and fertilization factors such obvious effect on the land and soil, and climate factors that have some impact on its. Wuqing under different land use patterns in a specific performance of each nutrient:organic matter content in com> fallow land> orchard> wheat> woodland> vegetable; changes in alkali dispelled nitrogen content of the performance of the wheat> orchard> corn Land>fallow land> forestland> vegetable; available potassium performance for the wheat> corn> orchard>woodland> fallow land> vegetable; available phosphorus content is specifically expressed in maize> wheat> vegetable> orchard> Fallow> woodland.(2) Distribution of soil nutrients from the point of view, different land use patterns of vertical distribution of soil nutrients in strong agreement. North Canal downstream Wuqing land use patterns in different soil nutrient trends were:organic matter, alkali dispelled nitrogen content was basically the "S"-shaped distribution of available potassium was "U"-shaped distribution, while the available phosphorus content was Linear downward trend. Under different land use on soil nutrients and a variety of factors, some of the nutrient content of different grain size and content of the relationship between soil particles needs further research.(3) To statistical analysis further revealed the spatial variability of soil nutrients in the case, the main tool is the semi-variance function, using a combination of geostatistics and GIS method, the content of these elements of the spatial variability, and the Kriging Interpolation to obtain the spatial distribution of content, obtained for the weak variation of pH, and organic matter, alkali dispelled nitrogen, available phosphorus, available potassium variability were moderate intensity. Soil type on soil pH, available phosphorus affecting the distribution, especially effects on soil pH;North Canal basin water of nitrogen, spatial distribution of organic matter in large river systems developed regions was significantly higher than the regional water systemdeveloped; available potassium are mostly caused by other factors.Therefore, in order Wuqing reasonable land use and the rational distribution off arming, should consider various aspects of biology and ecology of different crops, according to the different areas of land use, soil types and water conditions, adjusting planting structure, reasonable Farming, so as to Wuqing better value for money.