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小麦苗期,由于管理不善或受外界不良因素的影响,使生长发育受阻,造成不同程度的红苗、黄苗、褐叶苗、紫叶苗、黄白叶苗等。根据麦苗叶色的变化进行诊断,对症下药,管好麦苗。 1.红苗。遇干旱,土壤水分供应不足,麦苗生长缓慢,植株瘦弱,叶色变为淡红色,是干旱引起的。要及时结合追肥进行浇水。冬前雨水过多,麦苗渍涝,叶色变为暗红色,是渍害引起的红苗,要及时排出清水。 2.黄苗。氮素不足,麦苗生长不良,茎秆矮小,细弱呈直立状,基部叶片先发黄,叶尖干枯,
Wheat seedling, due to poor management or adverse external factors, the growth and development blocked, resulting in varying degrees of red seedlings, yellow seedlings, brown leaf seedlings, Ziye Miao, yellow and white leaf seedlings. According to changes in the color of wheat seedling diagnosis, the right medicine, good wheat seedlings. Red seedlings In case of drought, insufficient supply of soil moisture, slow growth of wheat seedlings, thin plants, leaf color turned pink, is caused by drought. To timely watering with top dressing. Too much winter before the rain, barley waterlogging, leaf color turned dark red, is the red seedlings caused by stains, to promptly discharged water. 2. yellow seedlings Inadequate nitrogen, malt poor growth, short stalk, weak vertical erect, the first base leaf yellow, leaf tip dry,