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采用测土配方施肥统一推荐的“3414”设计,对水稻龙粳31的肥料效应进行分析,通过氮、磷、钾不同处理试验,对肥料的用量进行适当的调整,得出最佳的施肥指标体系。结果表明:两个密度下线性加平台模型拟合的最佳施肥量好于一元二次模型和三元二次模型的拟合施肥量,最佳施肥量为M1:N(尿素)154.8kg/hm2、P(磷酸二铵)99.5kg/hm2、K(硫酸钾)192.0kg/hm2;M2:N(尿素)135.75kg/hm2、P(磷酸二铵)115.2kg/hm2、K(硫酸钾)155.2kg/hm2,M1施肥量高于M2,M1产量也高于M2。
Through the “3414” design, which was unifiedly recommended by soil testing and formulated fertilization, the effect of fertilizer on Longjing 31 was analyzed. Through the different treatments of nitrogen, phosphorus and potassium, the amount of fertilizer was adjusted appropriately to get the best Fertilizer index system. The results showed that the best fertilization amount fitted by linear plus platform model at two densities was better than that of quadratic quadratic model and quadratic quadratic model. The best fertilization amount was M1: N (urea) 154.8kg / (potassium phosphate) 192.0kg / hm2; M2: N (urea) 135.75kg / hm2, P (diammonium phosphate) 115.2kg / hm2, K (potassium sulfate) 155.2kg / hm2, M1 was higher than M2 and M1 was higher than M2.