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采用田间小区试验,研究了在不同肥力水平的红黄泥田上,氮、磷、钾3因素4水平的15个处理对晚稻生长发育和产量的影响,得出最大产量施肥量和最佳经济施肥量模型。试验结果表明:三种肥力水平田施氮量越高,水稻株高、有效穗、穗粒数、实粒数占优势,理论产量越高,高肥力水平红黄泥田最佳施肥量N=12.89千克,P2O5=2.39千克,K2O=10.91千克,最佳产量为580.9千克;中肥力水平红黄泥田最佳施肥量N=13.806千克,P2O5=2.316千克,K2O=6.926千克,最佳产量为520.7千克;低肥力水平红黄泥田最佳施肥量N=16.643千克,P2O5=2.95千克,K2O=6.328千克,最佳产量为479.5千克。
Field experiments were conducted to study the effect of 15 treatments of 3 factors and 4 levels of nitrogen, phosphorus and potassium on the growth and yield of late rice at different fertility levels in red and yellow paddy fields. The results showed that the maximum yield and optimal economic fertilization Quantity model. The results showed that the higher the nitrogen application rate was, the higher the plant height, the effective spike, the number of grains per spike and the number of solid grains. The higher the theoretical yield was, the best N fertilizer application rate was N = 12.89 Kg, P2O5 = 2.39 kg, K2O = 10.91 kg, and the best yield was 580.9 kg. The best fertilization level in red-yellow paddy soil was N = 13.806 kg, P2O5 = 2.316 kg, K2O = 6.926 kg and the best yield was 520.7 kg ; Low fertility level of red and yellow muddy field best fertilizer N = 16.643 kg, P2O5 = 2.95 kg, K2O = 6.328 kg, the best yield of 479.5 kg.