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在小麦生产实践中,经常出现一些异常苗情,如不及时采取措施,难以实现高产。 一、干旱苗 发生在墒情不足或结构不良、容易透风跑墒的麦田。主要表现是:叶色灰绿,心叶迟迟不长,呈现“缩脖”现象,严重时小麦停止生长,次生根少,分蘖困难。对这样的麦田要分析缺水的原因,采取相应对策。对底墒好,因土壤悬空透气而造成吸水困难的麦田,要镇压提墒,使根系与土壤密接;对底墒不足的麦田要及时浇好分蘖水,对水源不足的旱麦,要采取镇压提墒和划锄保墒相结合的办法,充分利用土壤水分。 二、脱肥苗
In the practice of wheat production, there are often some unusual seedlings, if not timely measures, it is difficult to achieve high yield. First, a drought seedlings in the lack of moisture or poor structure, easy to run the wind moisture field. The main performance is: gray-green leaves, the heart leaves are not long, showing “shrink neck” phenomenon, when the wheat stops growing serious secondary root less tillering difficulties. To analyze the causes of water shortage in such wheat fields, take appropriate countermeasures. On the end of the soil moisture is good, due to soil hanging air permeability caused by water difficult wheat fields, to suppress the mention of soil moisture, so that the roots and the soil close to; at the end of inadequate wheat field irrigation timely pouring tillering water shortage of dry wheat, to suppress soil moisture And planted hoe soil moisture combination of ways to make full use of soil moisture. Second, take off fat seedlings