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冬小麦从播种到越冬为冬前时期。这一期间,小麦的生长中心是生根、出叶和增生分蘖。栽培管理的主攻方向是培育壮苗和使群体大小适中。高产田的小麦,当气温下降到2℃左右、植株基本上停止生长时,主茎叶片数要求达到6—8片,单株茎蘖数达到6个以上,每亩茎蘖数一般应达到60—80万,不超过100万,每个分蘖平均有节根1条以上。一般麦田单株茎蘖数也要在3个以上,每亩茎蘖数在50万以上。小麦从播种到出苗约需0℃以上的积温110℃左右,以后
Winter wheat from sowing to wintering for the winter period. During this period, the growth centers for wheat were rooting, leafing and tillering. Cultivation and management of the main direction is to nurture strong seedlings and make the group size. High-yielding fields of wheat, when the temperature dropped to about 2 ℃, the plant basically stopped growing, the number of main stem leaves required to reach 6-8, the number of tillers per plant reached more than 6, the average number of stems and tillers per acre should be achieved 60-80 million, no more than 1 million, with an average of more than one rooting per tiller. The average number of stems and tillers per plant should also be more than 3, with more than 500,000 stems and tillers per mu. Wheat from sowing to emergence need about 0 ℃ above the accumulated temperature of about 110 ℃, after