水果可用人工处理的方法增加甜度。据1981年日本研究指出,用一种人工配制的增甜液,在柑桔、西瓜、甜瓜等生长期,即当果实径长大到适当时期,喷洒到叶子表面,即可大大提高果实甜度。例如在100升水中加入相当于含200克纯硼的硼肥,2.4%蔗糖和0.7克氯化钙充分溶解后喷洒于蜜柑树叶面 Fruits can be artificially treated to increase sweetness. According to a Japanese study in 1981, it was suggested that using a kind of artificial sweetener can greatly increase the sweetness of fruit in the growth stages of citrus, watermelon and melon, that is, when the fruit diameter grows up to an appropriate period and is sprayed onto the leaf surface . For example, in 100 liters of water by adding the equivalent of 200 g of pure boron boron, 2.4% sucrose and 0.7 g of calcium chloride fully dissolved sprayed on the leaf of the orange tree