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小麦在生长发育中,到冬春季节,麦苗常出现发黄甚至枯死现象。单一的施肥无法转青,造成严重减产。其主要原因及补救措施如下:(一)麦稠发黄:播种不均匀或播量过多,使麦田群体密度太大.争光、争水、争肥,使麦苗个体瘦弱发黄。其补救措施是迅速间苗,及时追肥。若已进入拔节期,可采取压苗方法补救。(二)因肥力不足而发黄;主要发生在土壤肥力差、底肥严重不足的田块,
Wheat in the growth and development, to winter and spring, wheat seedlings often appear yellow or even dead phenomenon. A single fertilizer can not be turned green, resulting in serious cuts. The main reason and remedial measures are as follows: (a) wheat thick yellow: uneven sowing or sowing too much, so that the density of wheat field groups too .Slight, water, fertilizer, so thin and yellow wheat individual thin yellow. The remedial measures are rapid seedlings, timely top dressing. If you have entered the jointing period, can take pressure seedling method to remedy. (B) yellow due to lack of fertility; mainly occurred in poor soil fertility, a serious shortage of base fertilizer plots,