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。作物正常生长发育,除需要适宜的光照、水分、空气、温度等条件外,还必需满足所需的营养元素。作物生长发育必须的营养元素有:碳、氢、氧、氮、硫、磷、钾、钙、镁、硼、锰、铜、锌、钼、铁、氯等16种,它们都是作物正常生长发育所必须的,任何一种元素缺乏或过剩都会影响到作物的正常生长,当达到一定程度时,作物外形会表现出相应的生 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. Crops normally grow and develop, in addition to the need for appropriate light, moisture, air, temperature and other conditions, but also must meet the required nutrients. The nutrient elements necessary for crop growth and development include: 16 species of carbon, hydrogen, oxygen, nitrogen, sulfur, phosphorus, potassium, calcium, magnesium, boron, manganese, copper, zinc, molybdenum, iron and chlorine, The development of the necessary, any lack of a element or excess will affect the normal growth of crops, when reached a certain level, the crop shape will show a corresponding Health