近年来南丰县不少地方水稻栽入大田后，生长前中期叶片黄化现象很普遍。并有逐年扩展和加重趋势，经调查分析一除因缺钾引起叶片黄化外，缺镁黄化也是重要原因。水稻对镁的需求量比锰、硼、锌、锡等微量元素高出许多，是水稻正常生育所必需的大量元素d镁是叶绿素的重要组成部分 In recent years, Nanfeng County, many places after the rice planted in the field, before and during the growth of leaf etiolation is very common. And have expanded and aggravate the trend year by year, after a survey and analysis of a leaf due to potassium deficiency caused by yellowing, magnesium deficiency is also an important reason. The demand for magnesium in rice is much higher than that of trace elements such as manganese, boron, zinc and tin, which are essential elements for rice’s normal growth. D Magnesium is an important part of chlorophyll