不同管理模式下适时晚收对玉米产量和子粒养分含量的影响

Effects of Timely Late Harvest on Maize Yield and Grain Nutrients Accumulation under Different Management Modes

为了明确不同管理模式下玉米晚收的效果差异,采用田间试验方法,分别在农民习惯(T_(1))、高产高效(T_(2))和不施化肥(CK)3种栽培管理模式下,探究了适时晚收对玉米产量以及子粒氮磷钾养分积累量的影响。结果表明:适时晚收可以提高百粒重5.1%~9.3%、产量7.9%~11.0%,增加子粒氮、磷、钾素积累量17.3%~35.4%,且提升效果均达到了显著水平;在不同的管理模式下,适时晚收对产量以及氮、磷、钾素积累量的提升效果顺序均为高产高效模式>农户传统模式>不施肥模式。不同的栽培管理模式下,适时晚收均可显著提高玉米百粒重、产量和子粒养分含量,其中高产高效模式下提升效果最优。

In order to clear the effect of late harvest of maize under different management modes,field experi ments were conducted to explore the effects of timely late harvest on maize yield and grain nitrogen,phosphorus and potassium accumulation under three cultivation management modes: farmers’ traditional mode(T_(1)),highyield and high-efficiency mode(T_(2)) and no fertilizer(CK). The results showed that timely late harvest could increase the 100 grains weight by 5.1%-9.3%, the yield by 7.9%-11.0%, and the accumulation of nitrogen,phosphorus and potassium in grains by 17.3%-35.4%. Under different management modes,the order of the effect of timely late harvest on the yield and the accumulation of nitrogen,phosphorus and potassium was high-yield and high-efficiency mode>farmers’ traditional mode>no fertilization mode. Under different cultivation and management modes,timely late harvest can significantly improve 100 grains weight,yield and grain nutrient contents of maize,among which the improvement effect was the best under the high-yield and high-efficiency mode.