【摘要】 利用国家测土配方施肥项目从2006—2009年在河南省68个县(市)安排的781个玉米"3414"试验分析表明,全省玉米无肥区(N0P0K0)、无氮区(N0P2K2)、无磷区(N2P0K2)、无钾区(N2P2K0)、全肥区(N2P2K2)产量平均为分别为5447,5994,6840,7094,7661 kg/hm2.在优化施肥条件下,N、P、K、NPK增产率平均分别为32.05%,13.53%,9.70%,53.83%;N、P、K、NPK贡献率平均分别为21.07%,10.29%,6.53%,29.10%;N、P、K农学效率平均分别为8.59,10.85,7.81 kg/hm2;N、P、K偏生产力平均分别为38.46,100.73,101.93 kg/hm2.通过一元二次函数拟合表明,全省玉米最高产量施氮量和经济最佳施氮量平均分别为263和211 kg/hm2,最高产量施磷量和经济最佳施磷量(P2O5)平均分别为77和68 kg/hm2,最高产量施钾量和经济最佳施钾量(K2O)平均分别为78和66 kg/hm2.更多还原

【Abstract】 NPK application effect on maize were conducted in 68 counties of Henan Province using "3414" experiments from 2006 to 2009,the results showed that average yield of N0P0K0,N0P2K2,N2P0K2,N2P2K0,N2P2K2 were 5447,5994,6840,7094,7661 kg/hm2,respectively.Under optimized fertilization,N,P,K,NPK fertilizer average increasing yield rates were 32.05%,13.53%,9.70%,53.83%,respectively;average contribution rates of N,P,K,NPK fertilizer were 21.07%,10.29%,6.53%,29.10%,respectively;average agronomic effects of N,P,K fertilizer were 8.59,10.85,7.81 kg/hm2,respectively;average partial factor productivities from applied N,P,K were 38.46,100.73,101.93 kg/hm2,respectively.Simulated with quadratic function,average nitrogen amounts of max yield and max economy were 263 kg/hm2 and 212 kg/hm2,average phosphorus amounts of max yield and max economy were 77 kg/hm2 and 68 kg/hm2,average potassium amounts of max yield and max economy were 78 kg/hm2 and 66 kg/hm2.更多还原