密度和施肥对小麦新品种绵麦42产量的影响

Effect of Density and Fertilizer on the Yield of New Wheat Variety-Mianmai 42

采用四元二次回归正交旋转组合设计,研究了密度、氮肥、磷肥及钾肥对小麦新品种绵麦42的产量效应。结果表明:氮肥是影响产量的最主要因素,其次是磷肥与密度,它们对产量的影响达极显著水平;钾肥对产量影响较小,未达到显著水平。绵麦42获得高产(产量大于7500 kg/hm2)的具体栽培技术措施为:密度为226.35-250.65×104/hm2基本苗,纯氮量182.85-197.55 kg/hm2,P2O5用量119.4-130.8 kg/hm2,K2O用量79.65-113.85 kg/hm2。

The effects of density （ basic seedling） , applied amount of N,P2 05 and K2O on the yield of new wheat variety - Mianmai 42 were studied by applying a four - factor conic regressive mathematics model in this experiment, The results indicted that, the applied amount of N ,P205 and density influenced the yield significantly, they were the main factors that determined the yield ; the applied amount of K20 had little influence on the yield ,the yield responses to the factors were in order of ： applied amount of N 〉 applied amount of P205 〉 density 〉 〉 applied amount of K2O. The suitable cultivation measures for high -yield （more than 500kg/667m^2） of Mianmai 42 in West Sichuan were obtained, that were： density： 226, 35 -250. 65×10^4/hm^2, amount of N： 182. 85 - 197, 55kg/hm^2, amount of P205： 119, 4 - 130, 8kg/hm^2, amount of K2O： 79.65 - 113, 85kg/hm^2.