优化配方施肥对玉米产量、品质及效益的影响

为探讨优化配方施肥对玉米产量、品质和经济效益的影响，指导科学合理施肥，进行优化配方施肥试验。试验结果表明：优化配方施肥对玉米生长发育具有显明的促进作用。主要表现为：促进玉米的营养生长，增加有效穗、穗长、穗行数、行粒数、千粒重；提高玉米籽粒蛋白质、脂肪、淀粉含量，降低可溶性糖含量，改善玉米的品质。在本试验条件下，优化配方施肥单产达8784．4kg／hm2，比常规施肥单产7463．7kg／hm2，增产1320．7kg／hm2，增长17．7％；优化配方施肥净增效益31531元／hm22，比常规施肥净增效益26367元／hm2，增加5164元，hm：，增长19．6％，增产增收显著。

The impact of optimized formula fertilization on yield, quality and economic benefit of corn

In order to explore the impact of optimized formula fertilization on yield,quality and eco- nomic benefits of corn, so as to provide scientific and proper fertilization, an optimized formula fertil- ization experiment has been conducted. The results showed that optimized formula fertilization promot- ed the growth and development of corn greatly mainly as follows：to promote corn vegetative growth,in- creased effective ear,ear length,rows per ear, kernels per row,kernel weight;improve corn grain pro- tein ,fat, starch content, to reduce soluble sugar content, improve the quality of corn. Under the test conditions,yield of 8 784.4kg/hm2 can be reached by means of optimized formula fertilization, with an increase of 17.7%, 1 320.7kg/hm2 more than the conventional fertilization,7 463.7kg/hm2. Yield of 8 784.4kg/hm2 can be reached by means of optimized formula fertilization,with an increase of 17.7%, 1 320.7kg/hm2 more than the conventional fertilization,7 463.7kg/hm2. Optimized formula t~rtilization produced net returns of 31,531yualdhm2,increase by 19.6% ,5 164yuan/hm2,over the net returns of conventional t~rtilization, 26 367 元/hm2. The increase of yield and economic benefit is significant.