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以武育粳3号为材料研究了高、中、低3种地力水平下,氮肥用量对水稻产量及氮素利用率的影响。结果表明:氮肥用量和产量的高低应根据土壤肥力水平来确定,通过调控氮肥用量,科学合理施肥,各种地力水平的氮素利用率均可提高到40%以上。
Wuyujing 3 was used to study the effects of nitrogen rates on grain yield and nitrogen use efficiency at high, medium and low fertility levels. The results showed that the amount and yield of nitrogen fertilizer should be determined according to the level of soil fertility. By controlling the amount of nitrogen fertilizer and applying fertilization rationally, the nitrogen utilization rate could be increased to above 40% at various soil fertility levels.