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作物缺素症状是指作物因缺少某种必需的营养元素,影响体内的正常的物质代谢而在植株外观上表现出来的生理病态症状。随着氮、磷、钾等大量营养元素肥料投入的增加,根据木桶原理,中、微量营养元素缺乏的问题逐步暴露出来,通过掌握中、微量元素缺乏作物的症状,可以及时地补充中、微量元素肥料,保证作物正常生长发育。1.发病症状如症状先在老叶上出现,说明缺乏的是氮、磷、钾、镁、锌。由于这些元素在作物体内具有再度利用的特点,当作物
Crop deficiency symptoms are due to the lack of some essential nutrients nutrients, affect the body’s normal metabolism in the appearance of the plant physiologically manifested symptoms. With the increase of input of a large amount of nutrient elements such as nitrogen, phosphorus and potassium, according to the principle of barrel, the problems of lack of trace elements and nutrients are gradually exposed. By grasping the symptoms of lacking crops of trace elements and trace elements, Trace elements fertilizers to ensure the normal growth and development of crops. 1. Symptoms such as symptoms first appear in the old leaves, indicating the lack of nitrogen, phosphorus, potassium, magnesium, zinc. Because of these elements in the crop has the characteristics of re-use, as a crop