不同播期与收获期对夏玉米产量的影响

摘要

In order to study the effect of different seeding time and harvest time on maize yield,provide the scientific basis for maize production and meteorological services,field experiment with three varieties,three sowing dates,three harvest dates were carried out.The results showed that summer maize sown in June,the highest yield was in mid,compared with late sowing,the production increased more than 13%.Harvest period in late september could get the highest yield,compared with harvest period in early October,production increased about 5%.Thus,it is suggested that summer maize production should be sown in mid June and the harvest in late september.%为研究玉米不同播期、收获期对产量的影响，给玉米生产和农业气象服务提供科学依据，课题组选用3个品种，采用3个播期、3个收获期，就不同播期、收获期对玉米产量的影响进行了田间试验。结果表明：夏玉米6月上旬、中旬、下旬播种，中旬产量最高，上旬和中旬播种产量接近，下旬播种较上、中旬减产13%以上。9月下旬初、末和10月上旬3个收获期，以9月下旬初收获产量最高，下旬2次收获产量接近，10月上旬收获产量下降5%左右。综合以上试验结果，结合农业生产条件变化和气候资源增加及影响，开封夏玉米生产以6月上、中旬播种，9月下旬收获为宜。