【摘要】 根据玉米氮、磷、钾"3414"回归设计田间试验的结果,分别建立产量为目标函数的氮磷钾三元二次、氮磷、氮钾、磷钾二元二次及氮、磷、钾一元二次3类7种肥效模型,根据各肥效模型提供的施肥参数和产量期望的经济效益分析结果,决选出氮肥的一元二次效应模型提供的施肥决策:施纯氮333.66kg/hm2、五氧化二磷120.00kg/hm2、氧化钾90.00kg/hm2,产量期望9196.50kg/hm2,产投比6.39,能兼顾产量与肥料投资效益,作为延津县夏玉米生产的推荐施肥量。更多还原

【Abstract】 Based on the data measured from"3414"regression design field experiments of corn,the NPK,NP,NK,PK binary and N,P,K quadratic 3 categories 7 kinds fertilizer models were established as the objective function of corn yield.According to the analysis of the expected fertilization parameters provided by the fertilizer models and yield economic benefits,decision-making fertilization provided by N fertilizer quadratic effect model were determined:the application of pure N was 333.66 kg/hm2,P2O5 was 120.00 kg/hm2,K2O was 90.00 kg/hm2,yield expectations was 9 196.50 kg/hm2,output to input ratio was 6.39.Taking into account the yield and fertilizer efficiency,it can be used as recommended fertilizer of maize production in Yanjin County.更多还原