龙眼是亚热带的名果,在国际市场上长期供不应求.福建是国内主要龙眼产区,栽培面积20万亩,年产鲜果5万多吨.近年来,龙眼栽培面积迅速扩大,但管理粗放,全省7万多亩幼龄龙眼,大部分投产迟、单产低.如何促进龙眼幼树速生早产高产,是当前龙眼生产上亟待解决的重要课题. Longan is the famous fruit of the subtropical zone, long-term demand in the international market. Fujian is the major longan producing areas, cultivation area of ​​200000 acres, with an annual output of more than 50,000 tons of fresh fruit .In recent years, the cultivation of longan area expanded rapidly, but the extensive management, The province of more than 70,000 acres of young longan, most put into operation late, low yield. How to promote longan fast growing premature and high yield, is the current production of longan urgent need to solve an important issue.