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水稻高产决定于水稻对氮肥的吸收(即氮肥利用率)和水稻体内累积的氮素转化成经济产量的效率。已有研究表明:氮肥深施(全层混施以及球肥或粒肥深施)和增添硝化抑制剂,是提高氮肥利用率的有效措施。影响水稻体内累积的氮素转化成稻谷的生产效率的因素颇多,但从土壤肥料角度来看,主要是养分之间的协调供应,以及土壤氮素供应过程与水稻需求,协调两个方面。对于后一问题,我们从一九七五年起,曾就高产水稻的需氮特点进行过
Rice yield is determined by rice’s absorption of nitrogen (ie, nitrogen use efficiency) and the efficiency with which nitrogen accumulated in the rice is converted into economic output. Studies have shown that deep application of nitrogen fertilizer (full-thickness mixed application of fertilizer and fertilizer of granule or grain) and addition of nitrification inhibitor are effective measures to improve the utilization rate of nitrogen fertilizer. There are many factors that affect the production efficiency of nitrogen transformation into rice in the rice body. However, from the perspective of soil fertility, the main supply is the coordination between nutrients and the supply and coordination of soil nitrogen supply and rice. As for the latter issue, we started from 1975 on the nitrogen requirement of high-yielding rice