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本试验采用连续两个轮作周期的稻麦轮作定位试验,研究了氮肥减施对作物氮素吸收、利用和土壤氮素平衡的影响。结果表明,在传统推荐施肥(氮肥用量小麦为195千克/公顷,水稻为210千克/公顷,均按底肥40%、分蘖肥30%、拔节肥30%分3次施用)的基础上,氮量减施20%,并配合综合调控技术措施,产量并没有降低,而且氮肥表观利用率、农学利用率、氮肥偏生产
In this experiment, two successive cropping cycles of rice and wheat were used for locating experiments to study the effects of nitrogen application on crop nitrogen uptake and utilization and soil nitrogen balance. The results showed that on the basis of the traditional recommended fertilization (195 kg / ha for nitrogen fertilizer and 210 kg / ha for rice, all were applied 40% of base fertilizer, 30% of tillering fertilizer and 30% of jointing fertilizer) Reduction of 20%, and with the comprehensive regulation and control measures, the yield did not decrease, and the apparent utilization of nitrogen fertilizer, agricultural utilization, partial nitrogen fertilizer production