Study On The Three Nitrogen Transport And Transformation In Typical Soils Of Guanzhong Basin

The groundwater pollution of the nitrogen is popular all over the world. NH₄⁺, NO₂^- , NO₃^-was called three nitrogen pollution becomes the hot topic on which the domestic and foreign experts studied. But nitrogen leaching in the farmland soil was considered the main reason to deduce the groundwater pollution. Guanzhong basin is the national development and construction area, it also is Shann'xi province important industrial base and the food, cotton and oil production area. It belongs to the arid and half arid area, The shortage of groundwater resource and the pollution of groundwater have become the serious problems in this area. In recent years, the local peasants irrationaly applied the farmland manure and the chemical fertilizer, specially the nitrogen fertilizer, lead to the higher nitrate residue in the soil, causes the ground-water to encounter the more and more serious pollution.This paper aimed at the special geographical position and the economic status of Guanzhong basin. Select the three kind of typical soils: loess plateau-loess, second bottom-silty clay, flood plain-silty soil, Make plan which includes the investigation and the simulation planting experiment.Analysis the Guanzhong basin nitrogen pollution in farmland soil at present situation through investigation, Study three nitrogen transport and transformation rule in the different type soil through the crops planter studies. Discuss the relation between growing of the crops and transport and transformation of nitrogen in soils. Research the influence of environmental factor on three nitrogen changing, Provide the science significance for local agricultural production. It is very important to protect the local groundwater resources and maintain the sustainable development.The field investigation results indicated that, in recent years, groundwater and the farmland soil nitrogen pollution condition of Guanzhong basin was quite serious, the nitrogen pollution was the result of the abusive use of fertilizer and incorrect ways of agricultural. Three kind of farmland soils of Guanzhong basin are weak alkaline and their vadose charator which lead to be liable to nitrification, therefore the nitrate...