Analysis On Grey Correlation Between Soil PH Value And Soil Nutrients Of Datong District,Daqing

Datong District is one of the most important food production base, the cultivated land area is 693.5km2, takes up 33.4% of the total area of the city. Corn is the important crop driving the local economy development. In recent years, due to the farmers unreasonable apply fertilizer, lead to Datong District soil pH reaching higher,and the soil pH has a great influence on nutrient availability, so the soil fertility declining, there have been a series of questions that crops grow slow, food quality decline, food crops production reduce and so on. The article according to the status of Datong District soil pH, through descriptive analysis the soil pH, and study the abundant deficiency condition of the soil nutrient, and analyze the correlation and grey correlation between them, to provide some scientific basis for reasonable fertilization.The study takes the four village farmland soil of the Datong District, Daqing as the research object, through combine with the field investigation, take sample and the lab analysis, and describe analysis the soil pH and the soil nutrient condition. And with reference to the research results of the scholars inland and abroad, select multiple comparison analysis and grey correlation, to study the relationship between soil pH and organic, available N, total N, available P, total P, available K, available Cu, available Zn,available Fe and available Mn. Researches show that the soil pH has strong alkalinity of Datong District four village, the soil nutrient content is imbalance. Organic, available phosphorus and available kalium is in the most appropriate level, available nitrogen total nitrogen is too much, but total phosphorus is lack, microelement are medium. Grey correlation analysis shows that the correlation sort with the soil pH is available N>total N>available K>organic>available Fe>available Cu>available Mn>available P>total P>available Zn. It should take measures to improve soil pH in production, apply nitrogenous fertilizer reasonably, In order to promote crops grow better.