在小麦出苗阶段,由于播种量大,基本苗多或氮肥用量较多,越冬前后气温偏高等原因,往往会出现冬前旺苗徒长和群体过大现象,这类麦田的麦苗单株分蘖多,叶宽大而薄,叶色发淡变黄,年前群体分蘖数过高,不利于麦苗安全越冬和健壮生长。对这类麦田应采取以下三 Wheat seedling stage, due to large seeding, more basic or more nitrogen fertilizer, before and after overwintering because of high temperatures, tend to appear before the winter wangzong disciples and groups are too large, such wheat seedling tiller and more per plant, Large and thin leaves, pale yellow leaves, the number of years before the group tillering is not conducive to the safety of wheat seedlings overwintering and robust growth. The following three of these wheat fields should be taken