Effect Of Optimized Application Of Nitrogen Fertilizer In High Yield Commissariat Farmlands

It is one of the hot issues for agricultural production to fertilize Nitrogen reasonably. This article choose Intercropping wheat and maize to be the researching object in the rich nutrient soil in the north, At the same time P and K was monitored, with nitrate residues in soil, The important research is the law of the absorption,transfer of soil nitrogen. with the determination of crop yield on the balance of nitrate and efficiency, especially the nitrate remains and changing character of the soil, to format technology system of application optimization and soil construction to nitrogen pollution control and efficient use as the center. mining nutrition potential, improving the efficiency of resource use, increasing crop production and ensure food security and improving the quality of agricultural products, Environment pollution was controlled Effectively because of fertilization blindly.After two years of field trials, indoor analysis, the main conclusions are as follows:1.Ventilation is simple, easy to operate, the results of the accuracy and precision and high recovery rate as high as 99.51 percent, the average catch of Ventilation was 6.64 mgN. Its coefficient of variation was only 0.77 percent. In organic fertilizers and chemical fertilizers combined application, organic fertilizer can delay the Effect of chemical fertilizers, ammonia fertilizer to reduce evaporation losses. The lower the temperature, precipitation, the more soil moisture is,the less volatilation.2. Ammonium bicarbonate, ammonium sulfate, urea fertilizers are different in the volatilation.The order of the volatile :ammonium bicarbonate> ammonium sulfate> urea. The average rate of the three volatile were 0.468,0.338, 0.326 kg ? ha-1 ? d-1. three ammonia volatilization increased after fertilizer increases.3.Among the Optimization of fertilizer and the customary fertilizer ,the output of the Optimization increased 2.73% -6.39% .No nitrogen of the first winter wheat production was significantly lower than dealing with nitrogen, the first maize production has no significant differences with fertilization treatment. No fertilizer for maize yield was a relatively small impact. Different treatments so that grain of corn there was no significant difference. This shows that Fertilization can affect the size of wheat grain weight, but the impact was not obvious 100-seed weight of the corn.4.Different treatments of soil nitrate content was significant, Optimal treatment of nitrate fertilizer was less than customary treatment, CK treatment quarter crop harvest period plunged nitrate content of 37.86 percent, the second and the third quarters of declining crop nitrate content of easing, to four, five quarters after the crops tend to stable, but more tests before a decrease of 53.48%.Optimization of fertilizer and fertilizer are used to maintain a grip, but the former is more suitable for crop growth and reduce the nitrate losses.5.Different treatments of nitrogen absorption efficiency was significant, and optimize treatments used to deal with than the high efficiency of nitrogen absorbed 49.15%., The nitrogen absorption efficiency of corn relatively stable, but there is downward trend for wheat quarter. The PE of the Optimization of nitrogen fertilizer is superior habits fertilization. The PEP and nitrogen fertilizer application rate was negatively correlated, and Wheat quarter was lower than the corn quarter.6.Different soil fertility influents the crop production and nitrate content. Fertilization of the crop used to increase the luxury of soil nutrient absorption, so that the different quarterly crops show the nitrate residue. Above the optimization of fertilization treatment, the fertility of different plots nitrate fertilizer residues were lower than customary, but the high fertility of land nitrate residues higher than the low fertility plots. The main crops absorption nutrients were from fertilizer, but high fertility is the guarantee for the crop yields.7. The crop soil absorption system can be Nmin buffer region through the formation of other nitrogen. The range was 101.42 kg N·ha-1 -173.45 kg N·ha-1 .Optimization of fertilization treatments was in this buffer area. The bearing capacity of soil nitrogen better crop yields to the highest, and the remnants of soil nitrate lower. Optimize fertilization effects obvious, optimize fertilization were saved 36.84% -52.97% than habits fertilization fertilizers.