以纽荷尔脐橙为试材,研究留树保鲜对脐橙果实生理变化和贮藏效果的影响,探讨留树保鲜的效益.结果表明:留树保鲜较7℃冷藏能明显提高果实的总糖、可溶性固形物和Vc含量,提高果实的品质,其中以20 mg/L GA3与20 mg/L2,4-D混合处理的效果最好,且以留树保鲜60d左右为宜.留树保鲜对翌年树体春、秋梢的粗度及数量、座果率以及翌年果实的总糖、可溶性固形物含量有一定的影响,但差异均不显著,且可以通过春季增加施肥量来恢复,其中以每株尿素1.0 kg与钙镁磷肥1.5 kg混施效果最好；而对翌年产量则基本上没有影响,且能明显提高经济效益,与正常上市鲜销相比,平均可增收约23 865元/hm2,值得在生产上推广应用.%An experiment was carried out with Newhall navel orange to study the influence of the posthar-vest physiological and biochemical changes during on-tree storage. The results showed that compared with the 7℃ cold storage, the total sugar, soluble solids and Vc content of the fruit increased and the quality of fruit was improved during on-tree storage, and in which the 20 mg/L GA3 and 20 mg/L 2,4 - D mixed treatment was the best, and it was appropriate to keep up to 60 days during on-tree storage of Newhall navel orange. On-tree storage certainly affected the diameter and number of the spring and fall shoots, fruit setting rate, the total sugar and the content of soluble solids of fruit in the following year with no significant difference, and which could be restored by increasing fertilizer in spring, and urea 1.0 kg mixed with calcium magnesium phosphate 1.5 kg a tree had relatively good effect. It has little effect on the yield in the following year and significantly increase economic efficiency. Compared with marketing fresh on normal market, it increased about ￥23 865 in average, worth popularization and application in production.
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