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冬小麦出现弱苗的原因多种多样,但在小麦生产中,要针对不同类型的弱苗,采用对症管理技术,促使麦苗由弱转壮,以利春后早发,挽回产量损失。1 干旱弱苗 这类弱苗主要受旱情影响,发生于底墒不足或土壤过松,容易跑墒的田块。主要表现是叶色灰绿、生长滞缓、心叶难以抽出、基部叶尖变黄、次生根少而弱分蘖少等症状。其对症管理措施是:抓紧时间镇压、增墒,促使根部土壤
There are many reasons for the emergence of weaker seedlings in winter wheat. However, in the wheat production, different types of weak seedlings should be used and symptomatic management techniques should be adopted to promote the transformation of wheat seedlings from weak to strong in order to recover early yield loss after spring. Arid weak seedlings This weak seedling is mainly affected by the drought, occurs at the end of insufficient soil moisture or soil is too loose, easy to run moisture field. The main performance is gray-green leaves, growth retardation, difficult to extract the heart leaves, the base of the tip yellowing, secondary root less weak and less tiller symptoms. Its symptomatic management measures are: seize the time to suppress, increase moisture, to promote root soil