镁是光合作用的主要物质——叶绿素的组成核心,也是某些酶的激活物质,在碳水化合物代谢过程中起着很重要的作用,并能促使植物体内维生素A和维生素C的形成,对于提高果品质量有重要意义。在柑桔叶片、分生组织和种子中含有大量的镁。柑桔对镁的需要量远比其他微量元素的需要量大得多。由于我省柑桔栽培多系酸性土壤,加上气候影响,土壤淋溶较剧,使柑桔常出现缺镁症状。叶片缺镁时主脉两侧退绿,出现不规则黄斑,继而扩大成 Magnesium is the main substance of photosynthesis - the core of chlorophyll, but also the activator of some enzymes, plays an important role in carbohydrate metabolism and can promote the formation of vitamin A and vitamin C in plants Fruit quality is important. In citrus leaves, meristems and seeds contain large amounts of magnesium. Citrus magnesium needs far greater than the other trace elements required. As the province of citrus cultivation of multi-line acid soil, coupled with the impact of climate, soil leaching more drama, so that citrus often appear magnesium deficiency symptoms. When the leaves magnesium deficiency on both sides of the main veins green, there are irregular macula, then expand into