冬小麦苗期是指从播种出苗到小麦起身拔节前,其生长特点是以长叶、长根、长蘖为主的营养生长。小麦苗期要经历一个严寒的冬季,如果管理不好,会形成畸形苗、冻苗、黄苗、死苗,从而造成缺苗、断垄,严重影响小麦产量。下面介绍几种异常苗的形成原因及防治方法:一、疙瘩苗和立针苗 Winter wheat seedling refers to the emergence from the sowing to wheat rose before the jointing, its growth is characterized by long leaves, root, tiller-based vegetative growth. Wheat seedlings to go through a cold winter, if not properly managed, will form deformed seedlings, frozen seedlings, yellow seedlings, dead seedlings, resulting in lack of seedlings, broken ridge, a serious impact on wheat yield. Here are several reasons for the formation of abnormal seedlings and prevention methods: First, the pimple and seedling seedlings