摘要
本文运用311-A拟饱和最优回归设计,在沿海赤砂土甘薯主产区设置晚薯施用氮磷钾肥料试验,模拟出甘薯薯块产量和施肥利润的氮磷钾肥料效应函数,通过极值判别均为典型函数,用边际分析寻优,获得甘薯薯块最高产量和最高施肥利润的优化施肥组合分别为:Zmax为Z1=N136 25kg/hm2,Z2=P2O552 71kg/hm2,Z3=K2O275 68kg/hm2,薯块产量最高,^ymax=39 214t/hm2;Zopt为Z1=N117 09kg/hm2,Z2=P2O546 24kg/hm2,Z3=K2O247 01kg/hm2,施肥利润最佳为^πopt=18298 99元/hm2。
Using 311A optimum regression design,a NPK fertilizer trial was designed and conducted in the main cropping area of late sweet potato in a coastal sandy soilThe fumctions of fertilization effect of sweet potato tube yield and its profit were obtained,which were both typical functionsThrough mathematical calculation and analysis,it was clear that the amount of NPK fertilizers was N 13625 kg/hm2,P2O5 5271kg/hm2 and K2O 27568 kg/hm2,respectively when maximum yield was achievedThe above three fertilizers were 11709,4624 and 24701 kg/hm2 respectively when maximum profit of fertilization was realizedThe maximum yield and maximum profit were 39214 t/hm2 and 1829899 Yuan/hm2,separately
出处
《土壤肥料》
CSCD
北大核心
2003年第4期32-35,43,共5页
Soils and Fertilizers