小麦出苗后受自然条件和栽培技术的影响,会形成异常苗,主要表现在苗的颜色不正常,应对症管理。黄叶苗,一是由土壤干旱造成,多发生在底墒不足或跑墒透风的麦田,分蘖发生慢,叶色灰绿,心叶短小,生长缓慢或停滞,中下部叶片逐渐变黄干枯,根少而细。管理上应结合浇水每亩施尿素7～8公斤。二是 Emergence of wheat by the natural conditions and cultivation techniques, will form abnormal seedlings, mainly in the seedling color is not normal, response management. Yellow leaf seedlings, one caused by soil drought, occurred in the end less than the amount of soil moisture or moisture running through the wind, tiller slow, leaf color gray green, short leaf heart, slow growth or stagnation, the middle and lower leaves gradually yellowing, root Small and thin. Management should be combined with water per mu fertilizer urea 7 to 8 kg. two is