近年来龙眼生产普遍存在“花而不实”的问题，特别是成花好、成花早、花量大的植株着果率更低。据观察，龙眼“花而不实”的主要因素是花量大，营养消耗多，雌花比率低，花质差，导致小果前期发育不良而大量落花落果。为此，笔者作了试验。１“龙眼丰产素”试验试验于１９９１ Longan production in recent years, the prevalence of “flowers and not real,” the problem, especially into a good flower, early flowering, large amount of flowers plant with a lower fruit rate. It is observed that longan “flowers and not real” the main factors are large amount of flowers, nutrition and more consumption, low rate of female flowers, flowers poor, leading to premature malformations and a large number of fruit drop. To this end, I made a test. 1 “Longan high yield vegetarian” test in 1991