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在小麦即将越冬,日平均气温下降到4—5℃(当地20年平均为11月中旬)时,在小麦行间开沟起土盖苗,并在行间沟内串施氮磷混合肥料,随后灌冻水。翌年早春气温回升,日平均气温达到3—4℃时,搂除覆土,小麦苗、叶保持青绿,无冻害,叶片逐渐由浅绿转为深绿,形成壮苗带青安全越冬。从1976年开始试验这种冬季管理措施,1977年秋全县推广青苗盖土结合追施腊肥共14万亩。小区试验与生产实践都证明:冬季破背盖土,追施腊肥能保苗带青越冬,保墒保蘖,是一项保苗、壮苗增产措施。如辛店公社西沙里大队调查:盖土1寸半的亩产470.4斤比不盖的亩产391.2斤增产20.3％,盖土并追氮磷化肥的比不盖
In the wheat winter is about to win, the average daily temperature dropped to 4-5 ℃ (local average of 20 years in mid-November), the ditch in the ditch between the soil to play Tigao, and in the inter-line ditch nitrogen and phosphorus fertilizer, Then pour frozen water. The temperature rose in early spring the following year. When the average daily temperature reached 3-4 ℃, the hull was covered and the wheat seedlings and leaves remained green without freezing injury. The leaves gradually turned from light green to dark green and formed strong and safe young green wintering. From 1976 to test the management of this winter, the autumn of 1977 the whole county to promote green topsoil combined with a total of 14 acres of wax dressing. Community trials and production practices have proved that: breaking the back cover in winter soil, dressing topdressing seedling can be green with winter, soil moisture tiller, is a seedling, seedling stimulation measures. Such as Xindian commune Xisha team survey: covered soil 1 inch and a half of 470.4 kg mu than 391.2 kg mu yield 20.3%, covering the soil and the ratio of nitrogen and phosphorus fertilizer does not cover