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采用田间试验方法 ,进行早造水稻最佳施氮量试验研究。结果表明 :水稻当造尿素的适宜施用量为 2 62 .5～ 3 3 7.5kg/hm2 ,最佳施用量为 3 0 0kg/hm2 。
Field experiments were conducted to test the optimum nitrogen application rate of early rice. The results showed that the suitable application rate of urea for making rice was 2 62.5-3.3 7.5kg / hm2, and the best application rate was 300kg / hm2.