Study Of Ecological Balanced Fertilization Of Parameters In Albic Soil

Ecological balanced fertilization is new fertilization system , which is considered from soil-environment-human .based on the theory of its model and carried by ecological fertilizer. Nevertheless, the application and enforcement ecological balanced fertilization model is based on the research of its parameters.Four parameters of ecological balanced fertilization model are systemically studied in this experiment, namely, P(kg/hm2)-the amount of nitrogen fertilizer that crop absorbs from fertilizer; Lfsp(kg/hm2)-the summation of the loss amount of fertilizer and soil nitrogen and the amount of nitrogen that crop absorbs active nitrogen in the cultivation layer; Tn+1(kg/hm2)-the summation of the residual nitrogen in fertilizer and the residual amount of soil active nitrogen in the cultivation layer behind season; Tn(kg/hm2)-the total amount of active nitrogen in the cultivation layer before seeding And we apply this four parameters to calculate the amount of ecological balanced fertilization in ablic soilThe results in the experiments show: when corn yield is 100 kilograms in albic soil in HuaNan County, the amount of nitrogen that corn needs is 2.85 kilograms, soybean's is 7.14 kilograms; the amount of phosphorus that corn needs is 0.82 kilograms, soybean's is 1.78 kilograms ; the amount of kalium that corn needs is 2.16 kilograms, soybean's is 4.14 kilograms.The ratio of corn fertilizer nutrients is 20.50%, soybean's is 19.82%; the value of phosphorus of corn is 34.35 kg/hm2, the value of phosphorus of soybean is 27.75kg/hm2. Through 15N plot experiments, we measure that the nitrogen loss of fertilizer in field in the ablic soil is that soybean's soil residual amount is 0.895g/m2, gaseous loss is 0.76lg/m2; corn's soil residual amount is 0.90g/m2, gaseous loss is 1.423g/m2.Moreover, we can figure out the loss amount of nitrogen fertilizer: the value of corn's lf is 23.23kg/hm2;the value of soybean's 1f is 16.65kg/hm2. According to blank field experiments, we calculate that corn's Lfsp is 39.88kg/hm2, soybean's Lfsp is 25.56kg/hm2.According to the soil analysis, we can get the value of Tn+1 and Tn; corn's Tn+1 is 286.65kg/hm2,corn's Tn is 270.15kg/hm2 ; soybean's Tn+1 is 269.25,soybean's Tn is 258.68kg/hm2,and we can calculate the W's value of the plan yield, corn's is 99.73kg/hm2, soybean's is 63.885kg/hm2,According to the climate character in HeiLongJiang Province, we scientifically rectify ecological balanced fertilization model's parameters; when we figure out Lsp that we make use of the results of soil measurement in the blank field; we initially make use of soil measurement results' difference after crop is reaped and before crop is seeded in the same year, but in the experiment we apply soil measurement results' difference before crop is seed in the year and in the last year, the value of rectified 1fsp of corn is 11.19kg/hm2, the value of rectified lfsp of soybean is 4.11 kg/hm2. We firstly apply the rectified ecological balanced fertilization parameters to calculate ecological balanced fertilization amount in ablic soil in HeiLongJiang Province, when corn yield is up to 7500kg/hm2, it needs 71.04kg pure nitrogen; when soybean yield is up to 2250kg/hm2, it needs 42.435kg pure nitrogen.This experiment show: Because ecological balanced fertilization decreases the amount of fertilizer, so it decreases the pollution of environment and groundwater, and it is propitious to the productivity of green food and the protection of environment, and it has extensive application perspective.