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20 0 0～ 2 0 0 2年以中粳武育粳 3号为材料 ,比较研究了不同施氮量对稻株吸收和产量形成的影响 ,并对公式计算的总施氮量进行验证 ,结果表明 :稻株吸氮量随着施氮量的增加而增加 ,氮肥当季利用率有一个适宜值 ,在试验获得 10 5t/hm2 产量条件下 ,每 10 0kg稻谷吸氮量为 2 11kg ,氮肥当季利用率为 4 2 0 0 % ;应用斯坦福公式能较正确计算施氮量
The effect of different nitrogen application rates on rice plant absorption and yield formation was compared with that of the middle japonica rice Wuyujing 3 in the period of 2000-2002. The total nitrogen amount calculated by the formula was also validated. Results The results showed that the nitrogen uptake of rice plants increased with the increase of nitrogen application rate, and the utilization rate of nitrogen fertilizer had an appropriate value in the season. Under the condition of yield of 105t / hm2, the nitrogen uptake per 100kg of rice was 2 11kg, Seasonal utilization rate of 4200%; application of Stanford formula can more accurately calculate the amount of nitrogen