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作物营养缺素症是作物体内营养不良的外部表现。通过对作物形态诊断,了解作物营养状况是科学施肥的重要依据。生产上如能及时针对所缺营养元素的肥料进行补充,一般症状即可减轻或消失,产量损失也可大大减轻。一、缺氮磷钾症状1.缺氮症状①小麦缺氮植株生长不良,幼苗细弱,呈直立状,分蘖少,叶片窄而短,基部叶片从叶尖开始,逐渐变黄干枯,并渐向上发展,千粒重低。
Crop nutrient deficiency is an external manifestation of malnutrition in crops. Through the diagnosis of crop morphology, understanding crop nutrition is an important basis for scientific fertilization. If the production can be timely for lack of nutrients to supplement nutrients, the general symptoms can be reduced or disappeared, yield loss can be greatly reduced. First, the symptoms of nitrogen and phosphorus deficiency 1. Nitrogen deficiency symptoms ① wheat nitrogen deficiency plants poor growth, thin seedling, was erect, less tillers, narrow and short leaves, the base of the leaves from the tip began to gradually turn yellow and dry, and gradually upward Development, one thousand low weight.