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小麦出苗后,由于受不利自然条件和栽培措施的影响,往往会形成各种不同类型的弱苗。我站经过几年来对冬前弱苗的观察与管理,总结出如下对应措施: 一、土壤缺氮的麦田,幼苗细弱呈直立状,分蘖减少,叶片窄小,下部叶片从叶尖开始变黄干枯,并向上部叶片发展。此类麦田应亩追施尿素8～10公斤或碳铵25～30公斤,也可用人粪尿700～800公斤,在行间沟施或随水浇施。二、土壤缺磷的麦田,麦苗根系发育差,次生
After emergence of wheat, due to unfavorable natural conditions and cultivation measures, different forms of weak seedlings are often formed. I stand after several years of observation and management of the weak winter before the winter, summed up the following measures: First, the nitrogen-deficient soil in wheat fields, thin seedlings erect, less tillers, narrow leaves, the lower leaves from the tip began to turn yellow Dry, and the development of the upper leaves. Such wheat fields should be topdressing urea 8 to 10 kilograms of urea or ammonium bicarbonate 25 to 30 kilograms, also available human waste 700 to 800 kilograms, ditch between the lines or with water facilities. Second, soil phosphorus deficiency in wheat fields, wheat seedling root development is poor, secondary