在研究香蕉、荔枝和龙眼 3种果树镁素营养特性的基础上开展施镁效应试验 ,结果表明 ,香蕉、荔枝和龙眼适量配施镁肥具有显著的增产效果 ,在施用氮磷钾肥料和配施钙、硫、锌、硼、铜肥等基础上 ,施镁处理比不施镁处理分别增产 1 2 .2 %、2 1 .8%、55.7%。试验结果显示 ,适量配施镁肥不仅可提高果实产量 ,而且还可以改善果实品质 The effects of magnesium application on banana, litchi and longan fruit were studied based on the results of magnesium application test. The results showed that the appropriate amount of magnesium fertilizer applied to banana, litchi and longan had a significant effect of increasing yield. On the basis of applying calcium, sulfur, zinc, boron and copper fertilizer, the application of magnesium increased by 12.2%, 21.8% and 55.7% respectively compared with that without magnesium treatment. Test results show that the amount of magnesium fertilizer applied not only to improve fruit yield, but also can improve fruit quality