晚收技术是指不增加任何生产成本的情况下,通过延长作物收获时间,降低子粒含水量、增加作物产量、提高肥料效率的一项简单有效的科学技术。当前,东北地区春玉米早收现象普遍,不利于茎叶养分向子粒转移、降低子粒含水量、增加春玉米产量、提高肥料效率。以吉林省梨树县春玉米为研究对象,通过田间晚收试验,研究不同收获时期对子粒含水量、子粒百粒重、春玉米产量、肥料偏生产力及经济效益的影响,探索晚收技术如何促进春玉米增产增效。现将试验结果总结介绍如下。1材料与方法1.1研究区域概况梨树县位于吉林省西南部,地处松辽平原腹地的东辽河西岸,土地肥沃平坦,素有 Late harvesting technology refers to a simple and effective science and technology that can increase the efficiency of fertilizer through prolonging the harvest time of the crops, reducing the water content of the grains, increasing the crop yield and increasing the fertilizer efficiency without any increase in the production cost. At present, the phenomenon of early harvest of spring maize in northeast China is widespread, which is not conducive to the transfer of nutrients from stems and leaves to grains, reducing the water content of grain, increasing the yield of spring maize and increasing the fertilizer efficiency. Taking the spring maize in Lishu County of Jilin Province as the research object, the effects of different harvesting periods on the moisture content of grains, 100-grain weight, yield of spring maize, partial yield of fertilizers and economic benefits were studied, and the late harvesting techniques were explored Promote spring corn yield increase efficiency. The test results are summarized below. 1 Materials and methods 1.1 Study area General situation Lishu County is located in the southwest of Jilin Province, is located in the hinterland of the Songliao Plain Dongliuhe West Bank, fertile land, known