关键词: 三月红荔枝, 磷, 钾, 钙

Abstract: It was conducted with Sanyuehong litchi fruits to study the effects of P, K and Ca applied by foliar nutrients sprayed the concentration 0.2% of solution of KH₂PO₄(PK), CaCl₂(Ca) and the mixture of the both (PK+Ca) on the quality and pigmentation of fruits.The results are as follows.Spraying different liquor could increase the weight of single fruit.The total of soluble sugar (TSS) in flesh of all treatments had the similar changes to each other among all the treatments and CK.The total of soluble sugar in flesh of PK treatment showed significantly higher than that of CK, and those of the other treatments were extremely remarkably lower than that of CK.The total acid (TA) in flesh of all treatments dropped down during early period, then they increased, and then they went downhill again.The TA in flesh of ripened fruits of CK was at the lowest point, and that of the treatment PK was significantly different from that of CK, and those of the other two treatments were extremely different from that of CK.The ratio of TSS/TA of the treatment PK had non-significant difference from CK, and those of the other treatments were remarkably lower than that of CK.To all treatments and CK, the dominant tendencies of the contents of the chlorophyll and carotenoid in carpel were down, and that of the anthocyanidin was up.The curves of the contents of carotenoid of all the treatments and CK were alike.When the fruits were mature, the content of the chlorophyll of CK was higher than those of the treatments or had on significant difference from the exceptional treatments, and that of the anthocyanidin of CK was lower than those of all the treatments.So all the treatments were good for the pigmentation of fruits.

Key words: Sanyuehong litchi, phosphorus, potassium, calcium