Effects of Foliar Application of GA3 on Flowering and fruit Quality of Very Early-maturing Satsuma Mandarin
2003
Moon, Y.E. | Kim, Y.H. | Kim, C.M. | Kho, S.O. (National Jeju Agricultural Experiment Station, RDA, Jeju, Republic of Korea)
Gibberellin (GA3) treatment during winter to reduce flowering was evaluated as a means to alleviate the alternate bearing of satsuma mandarin (Citrus unshiu Marc. cv. Miyamotowase). GA3 at 0, 25, 50, 100 mg ? L-1 , was sprayed on 9-year-old Miyamotowase satsuma mandarin trees on Dec. 30. 1997. A rate of leaf fall was not significantly different among the levels of GA3 concentration. GA3 treatment considerably decreased the number of flowers and increased the number of vegetative shoots. A rate of fruit set showed an increasing tendency as GA3 concentration level was increased. Fruit size was also affected by the levels of GA3 concentration, The percentage of large-sized fruit was increased at high level of GA3 concentration, while that of small-sized fruit was decreased at low level of GA3. The content of soluble solids and soluble solids and acid showed no significant differences among treatments.
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