温光生态因素与种植密度对玉米产量的影响

目的]研究温光生态因素和种植密度对玉米产量的影响。方法]设计不同的播种时期和种植密度,研究玉米千粒重及产量在不同的温光生态因素和种植密度下的变化情况。结果]5月18日播种的玉米千粒重最高,6月12日播种的最低。不同密度（6月12日播种除外）之间千粒重差异达到显著水平,且播期与密度存在互作效应;随着播期的推迟,产量呈现下降趋势;随着密度的增加,产量增加。结论]该结果为进一步提高黄淮海地区夏玉米产量提供参考。

Effects of Temperature and Sunshine Ecological Factors and Planting Density on Maize Yield

Objective] The aim was to study the effect of temperature and sunshine ecological factors and planting density on maize yield.Method] Designing different seedtime and planting density,the changes of maize 1 000-grain weight and yield under the different temperature and sunshine ecological factors and planting density.Result]The maize 1 000-grain weight of sowing maize on May 18 was highest,and was lowest of sowing on June 12.The difference of 1 000-grain weight was significant in different planting density(except on June 12),there had interaction between sowing date and planting density.The yield was decreased with sowing date delaying,and the yield was increased with density increasing.Conclusion]The result provides reference for studying enhancing summer maize yield in Huanghuihai Area.