In this study,the effect of water-soluble fertilizer on the internal quality of early-maturing Citrus unshiu Marc.cv.Miyagawa Wase was studied by applying it at different growth stages.The results showed that spraying elemental water-soluble fertilizers on the leaves and applying organic water-soluble fertilizers on the ground could effectively improve the internal quality of citrus fruits,such as soluble solid content and sugar-acid ratio,among which the soluble solid content and sugar-acid ratio of the fruit treated with 1 000 times of organic water-soluble fertilizers were higher than those of other treatments and CK.At the maturity of October 19th,several water-soluble fertilizer treatments can effectively promote the fruit coloring,and the color difference values L,b∗ and ΔE∗ were significantly higher than those of CK,which was beneficial to the early market time.Therefore,the application of a large number of elements and organic water-soluble fertilizers in the growth period of early-maturing Citrus unshiu Marc.cv.Miyagawa Wase could effectively promote the coloring of peel and improve the internal quality of fruit.
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