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To study the impact of organic manure and the type of soil nitrogen components and the loss of farmland nitrogen in 2008 2 009 years in the experimental base of the Chinese Academy of Agricultural Sciences, Langfang, Hebei farmland plot trial, two years planting crops for the spring corn - winter wheat - summer corn, corn quarter based organic fertilizer nitrogen 3 of total nitrogen dosage level that no fertilizer (N0), low nitrogen 72 1 55kg N 195 / ha (N1), high nitrogen 63kg N / ha (N2) (chicken manure, pig manure treatment N0, N1, N2, and three nitrogen levels, cow dung, duck manure processing N0, N2, 2 nitrogen levels), and the runoff, seepage two wastage in the field of in-situ simulated rainfall experiment, organic manure into farmland soil nitrogen component change Farmland nitrogen loss a whole process of research. The main conclusions are as follows: 1 as the unit area applied into the field of organic fertilizer can increase in the amount of mineralized nitrogen (amino acid nitrogen, acid hydrolysis and acid hydrolysis of ammonium nitrogen), 0 5 cm 2 0cm soil layer of mineralized nitrogen (acidolysis amino acid nitrogen, acid solution of ammonium nitrogen) content also increased, both were highly significant positive correlation (p lt; 0.01). N2 level, the amount of organic fertilizer nitrogen 195 4 the the 63kg N / ha, 0 cm, 5 2 0cm soil total soil nitrogen , acid solution of nitrogen, amino acid nitrogen acid hydrolysis, acid solution of ammonium nitrogen content than the no fertilizer treatment significantly increased 0 5 cm soil layer increased amplitude of 92.22%, 93.81%, 108.37%, 76.01% 48.48%, 44.47%, 60.04%, and 39.00%, respectively; 5 2 0cm soil increase. With 0 5 cm, and 5 2 0cm soil layer (acid solution of amino acid nitrogen, acid solution of ammonium nitrogen) content of mineralized nitrogen increase farmland leakage liquid, total nitrogen, water-soluble total nitrogen, NO 3 - -N concentration increased, both showed a significant (p lt; 0.05) or very significant positive correlation (p lt ; 0.01); With the application of organic manure mineralized nitrogen (amino acid nitrogen acid hydrolysis, acid solution of ammonium nitrogen) increased runoff, total nitrogen, total nitrogen increased loss of the water-soluble, leachate total nitrogen water-soluble total nitrogen, nitrate nitrogen increased loss of concentration and loss of two was significant (p lt; 0.05) or very significant positive correlation (p lt; 0.01). Application of four organic fertilizer farmland leachate nitrate are mainly the loss of form of runoff in major loss of slightly different form, in which the application of chicken processing agricultural runoff liquid nitrate-based, while the application of duck manure, pig manure, cow dung processing agricultural runoff liquid ammonium nitrogen-based; same nitrogen level, the types of organic fertilizer solution concentration of nitrogen form and amount of the loss has little effect on farmland loss. These results indicate that the application of organic manure in acid solution to the higher amount of ammonium nitrogen, soil mineralization nitrogen content is higher, the greater the risk of causing the loss of farmland nitrogen.
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