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1.施肥原理水稻667平方米产650～700千克对氮、磷、钾的吸收量表明,每100千克子粒产量对氮的吸收量大约为1.5千克、磷为0.5千克、钾为1.5千克。应根据土壤肥力和产量水平及水稻品种的耐肥性和肥水利用率,确定施肥量及施肥方法。秧苗叶片含氮量与分蘖发生和生长密切相关,含氮量
Fertilization Principle The amount of nitrogen, phosphorus and potassium absorbed by 650-700 kg rice in 667 square meters of rice shows that the amount of nitrogen absorbed per 100 kg grain yield is about 1.5 kg, phosphorus is 0.5 kg and potassium is 1.5 kg. Fertilizer amount and fertilization method should be determined according to soil fertility and yield level and rice varieties tolerance to fertilizer and fertilizer and water utilization. The nitrogen content of seedling leaves is closely related to the occurrence and growth of tillering, nitrogen content