龙眼果实亦称桂圆。果肉鲜嫩,果汁甜美。营养价值高,除富含蔗糖(12％左右),果糖(6％左右)外,粗蛋白、粗脂肪、维生素C、维生素K含量也相当高(分别为1.5％、0.1％、70毫克/100克、190毫克/100克左右)。是国内外市场上很受欢迎的珍贵果品。然而,龙眼的贮藏性能很差,常温条件下,采后4～5天即腐烂变质,失去商品价值。为适应出口创汇和国内特需供应,且龙眼果实较小(粒重10克左右)适于速冻贮藏。为此,我们于1985年开始龙眼速冻贮藏的研究。现将结果初报如下: Longan fruit also known as longan. Fresh fruit, sweet fruit juice. High nutritional value, in addition to sucrose (12%), fructose (6%), crude protein, crude fat, vitamin C, vitamin K content is also very high (1.5%, 0.1%, 70 mg / 100 G, 190 mg / 100 g). It is a very popular fruit on the market both at home and abroad. However, the longan storage performance is poor, room temperature conditions, 4 to 5 days after harvest rot that spoil, loss of product value. In order to meet the export earning and the domestic supply of special needs, and the longan fruit is small (weight about 10 grams) for frozen storage. For this reason, we started the research on frozen storage of longan in 1985. The results are as follows: