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目前,玉米品种越区种植现象仍很严重。据对通化地区一些乡镇1998年供种情况的调查知,晚熟品种如吉单 159、丹育 15、本育9 等的售出量占玉米种子总售量的60%。晚熟品种在积温较高年份,可表现较好的增产效果,而在积温较低,特别是早霜年份,安全成熟则没有保障。玉米含水量过高,即影响商品等级,如果保管不善还易发生霉变,造成经济损失。可见采取积极行
At present, the phenomenon of cross-planting corn varieties is still very serious. According to surveys on the supply of some townships in Tonghua district in 1998, the sales of late-maturing varieties such as Ji-ding 159, Dan-yu 15 and Ben-yu 9 accounted for 60% of the total sales of corn seeds. Late-maturing varieties in the higher temperature year, can be a better yield increase, while in the lower accumulated temperature, especially the early frost years, the security is not guaranteed. High moisture content of corn, which affects the product grade, if mishandled but also prone to mold, resulting in economic losses. Visible to take positive action