Studies On Applying Fertilizers Model To Meadow Paddy Soil For Growing Green Rice In The Middle Zone Of Jilin Province

The purpose of this paper is to explore combination of organic manure, inorganic fertilizer and biological manure under the condition of satisfying green manure rice's growing environment and its quality. In order to found fertilizers model of green manure rice, the meadow paddy soil was tested. The field experiment was divided into three parts: the first is experiment of the best nitrogenous fertilizer form and the limit of its use. The second is experiment of N, PaOs and K^O fertilizers rates. The third is experiment of applying fertilizers model of Grade A and AA green manure rice.The results showed that: in the first experiment, under the circumstance of spreading 60kgP2C>5/ha, 60kgK2O/ha and organic manure 30m3/ha. If spreading urea and other strains of nitrogenous fertilizers at any equal level, all quotas of applied urea is better than other treatments by means of analyzing yield and quality .The difference of them is reach notable, and exceeding notable level. So the best strain of nitrogenous fertilizer is urea.In the experiment of the limit amount of nitrogenous fertilizer, under the circumstance of spreading 60kgP2O5/ha, 60kgK2O/ha and Orgnic manure 30m3/ha. Through variety analysis, the differences of effective tillering in all treatments attain notable level. (LSD0.05=6.8302,LSD0.01=9.6381). If nitrogenous fertilizer is over, in effective tillering increase, effective tillering decreases. Amount of nitrogen applied is excessively (150kgN/ha), display obvious lodging symptom. With urea dosage increase, yield increase, but when urea applied reach 120kgN/ha, yield reach maximum. Then with urea increase, yield start decrease.By quadratic saturation D optima design, set up math model of N, P, K fertilizers applied and yield, by test, the model is reliable. By frequency analysis, may learn fertilizers applied combination of yield ^ 7442.79kg/ha: 177.10 ~ 127.90kgN/ha, 57.0 ~ 68.27kgP2O5/ha, 56.87 ~ 68.03kgK2O/ha. In this level, yield is 7736.04 ~ 7864.59kg/ha.N:P2Os:K20=l:0.54:0.52.Confer national standard of green manure rice, and according to the result of theexperiment of the best nitrogenous fertilizer strain and the limit of its use and result of the experiment of N, P2Os and K^O fertilizers rates, produce grade A rice should spread organic manure 30m3/ha, 117.10 ?127.90kgN/ha, 57.0 ~ 68.27kgP2O5/ha, 56.87 ?68.03kgk2O/ha, apply adequate micro quantity element fertilizer. Domestic have not standard of producing grade AA rice. The experiment show: synthesize thinking about yield and quality; producing grade AA rice should put together organic manure and biological manure. The effect is better.