新田县大豆最佳施肥量及肥料效应研究

通过"3414"肥料试验设计,开展新田县大豆田间最佳施肥量的研究。根据拟合出施肥量与产量的关系方程,计算出适合该地区大豆生产的N、P_2O_5和K_2O最佳施肥量分别为4.06、3.79和2.39 kg/667m~2,最佳产量为212.3 kg/667m~2。借助模型得出肥料施用量与产量关系:N和P_2O_5施用量≤3 kg与K_2O施用量≤2 kg时,增产效应最为明显。试验点钾肥肥效最为明显且需求量最少,在生产中应当谨慎施用。

Optimal Fertilizer Rate and Effect on Soybean in Xintian

In this study, "3414" fertilizer test was used to analyze optimal fertilizer application amounts for soybean field growth in Xintian County. The reasonable fertilizer rate by equation of relation between soybean yield and fertilizing amount was N at 4.06 kg/667m2 or 60.90 kg/hm2, P2O5 at 3.79 kg/667m2 or 56.85 kg/hm2 and K2O at 2.39 kg/667m2 or 35.85 kg/hm2, and the optimal economic yield was 212.3 kg/66m2 or 3184.5 kg/hm2. The N and P2O5 each at 3 kg/667m2 or 45 kg/hm2, and K2O at 2 kg/667m2 or 30 kg/hm2 used in the field performed the best yield-increasing effect. The fertilizer effect of K2O was outstanding and its amount demanded was least in the test site, so it should be used carefully in soybean production.