超高产栽培氮肥运筹对春玉米穗部性状及产量的影响

Effects of Nitrogen Application Strategy on Panicle Traits and Yield under Super-high-yield Cultivation in Spring Maize

以金山27为试验材料,连续2年研究了超高产栽培氮肥运筹对春玉米穗部性状及产量的影响。结果表明,各处理春玉米的穗长、穗粗、粒长、穗粒数、千粒重均以Opt-N(优化施氮,种肥、拔节肥、大口肥的比例为1∶3∶6)最大,秃尖长度以0-N最长,Opt-N最短;产量以Opt-N最高,130%Opt-N次之,0-N最低;经济系数以Opt-N最大,0-N最小。

Maize hybrid ＂Jinshan 27＂ was used to investigate effects of nitrogen fertilizer strategy on panicle traits and yield of spring maize under super-high-yield cultivation.The results showed that the highest ear length,spike diameter,grain length,grain number,1000-grain weight reached under Opt-N treatment（the ratio of seed manure∶jointing fertilizer∶ large mouth fertilizer was 1∶ 3∶ 6）.The longest spike bald length showed under 0-N treatment while the shortest appeared under Opt-N treatment.The highest yield reached under Opt-N treatment and the next was obtained under 130% of Opt-N treatment,while the lowest was showed under 0-N treatment.The highest economic index appeared under Opt-N treatment while the least showed on 0-N condition.The results showed that Opt-N was the best nitrogen fertilizer management strategy for super-high-yield cultivation of spring maize in this area.