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通过水稻“3414”完整方案的田间肥料效应试验,建立水稻目标产量与氮、磷、钾养分施用量的一元二次和三元二次回归方程,并在此基础上,提出了区域性土壤养分丰缺指标以及水稻氮、磷、钾施用量的推荐修正值,推荐潜江市域水稻目标产量为500～750kg/666.67 m2时,纯N的最佳施肥量10～14 kg/666.67 m2,P2O5的最佳施肥量4～6 kg/666.67 m2,K2O的最佳施肥量5～7 kg/666.67 m2。
Based on the field fertilizer experiment of the complete program “3414” of rice, a quadratic quadratic equation and a quadratic regression equation of the target yield of rice and the application rates of nitrogen, phosphorus and potassium were established. On this basis, a regional Soil nutrient abundance and deficiency index and the recommended correction value of nitrogen, phosphorus and potassium application rate of rice. When the target rice yield of 500 ~ 750kg / 666.67 m2 in Qianjiang is recommended, the optimal fertilization amount of pure N is 10 ~ 14 kg / 666.67 m2, The optimum fertilization rate of P2O5 was 4 ~ 6 kg / 666.67 m2, and the optimum fertilization rate of K2O was 5 ~ 7 kg / 666.67 m2.