不同施肥水平与组合对玉米生产性能的影响研究

应用三因素最优设计构造试验方案,研究氮肥、磷肥、钾肥不同水平与组合对玉米产量的动态关系。结果表明,磷肥对产量的影响最大,氮肥较小,钾肥居中。氮、磷、钾肥之间存在一定的交互作用,其中氮肥、磷肥间的交互作用较大,钾肥与磷肥间的交互作用较小。在试验范围内,就玉米籽粒产量而言,施肥量投入应为N:149.87～207.07kg/hm2,P2O5:38.23～143.52kg/hm2,K2O:24.63～129.91kg/hm2在此施肥范围内,可预报玉米籽粒产量为4707.5～5616.2kg/hm2。

Effects of N、P、K Fertilizer Application on the Production of Maize

The purpose of the experiment is to study the effects of nitrogen , phosphate ,potassium on the yield of maize. Mathematics models were established for the relations between the yields and the treatments of N ,P ,K fertilizer in this paper. The dynamic relationship between experimental factors and yield was showed by graphs .The results showed that the yield effects of the chemical fertilizers were in the order P > K > N and there were interactions among nitrogen, phosphate ,and potassium fertilizer. The interaction between nitrogen and phosphate fertilizer was large. The interaction between phosphate and potassium fertilizer was small. The optimum combination of N, P, K was N:149.87～207.07kg/hm 2 ,P 2 O 5 :38.23～143.52kg/hm 2 ,K 2 O:24.63～129.91kg/hm 2 at the same nutritional condition in the experimental field and the prospective yield of maize is4707.5～5616.2 kg/hm 2 correspondingly.