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据有关资料介绍,玉米种子含水量的安全系数在16.5％以下时不会造成受冻坏种现象。但是,由于近几年承担的繁种组合日期偏大,晚熟组合多,玉米苞叶紧,果穗含水量大,又因近两年光照比历年减少,仅1996年7、8两个月光照减少70小时,有效积温少70℃,再加上有的繁种户承包土地面积大,种植作物多而杂,庭院凉晒条件差等因素也影响了及时晾晒,不能及时脱水,遇到严寒冰冻造成坏种。为此,加强种子晾晒管理力度,及时脱水,保发芽是种子后期管理的关键措施。 1 适时抓好田间站秆剥皮,加速种子后熟,降低果穗的含水量。这项措施应掌握在玉米籽进入腊熟
According to relevant information, the safety factor of moisture content of corn seed below 16.5% will not cause frostbite phenomenon. However, due to the large breed combinations undertaken in recent years, the combination of late-maturing and more corn bract tight, ear water content is large, because the light of the past two years decreased over the years, only the light of July and August of 1996 decreased 70 hours, the effective accumulated temperature less 70 ℃, coupled with some bred households contracted land area, planting more and more complex, poor cooling conditions in the courtyard and other factors also affect the timely drying, can not be dehydrated in time, encountered freezing cold caused Bad species. To this end, strengthen the management of seed drying, timely dehydration, sprout conservation is the seed of the key management measures. 1 timely grasp of field station stalks, accelerate seed ripening, reduce the ear water content. This measure should be mastered in the corn seed into wax cooked