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20 0 1— 2 0 0 2年通过 8种不同施氮水平的试验 ,获得估算水稻目标产量 70 0kg/ 667m2 总施氮量的基本参数 ,结果表明 :每生产 1 0 0kg稻谷需氮量 2± 0 0 2kg ,肥料当季利用率 40 % ,基础地力产量 40 0kg/ 667m2 的土壤供氮总量5 55kg。
The basic parameters for estimating the total N application rate of 70 0kg / 667m2 in rice were obtained through the experiment of 8 nitrogenous fertilizers at 20 0 1-2 0 0 2 years. The results showed that the nitrogen requirement per 1 000 kg of rice was 2 ± 0 0 2kg, utilization rate of fertilizer 40% of the season, the basic soil productivity 40 0kg / 667m2 total amount of soil nitrogen 5 55kg.