Abstract:

In this study, different fruit-setting methods such as girdling, tying wire and spraying GA3 were used in the florescence period of Dongzao (Zizyphus jujuba Mill. cv. Dongzao). The effects of those methods on both the endohormone contents (IAA、ABA、GA、ZR) in leaves, blooming flowers, young fruits, flower-buds, shatters and the fruit-setting rate were analysised in order to discuss the function of different fruit-setting methods. The result showed that, girdling and spraying GA3 could effectively improve the balance of endohormone contents in Dongzao trees, integrating the two methods could improve the fruit-setting rate of Dongzao evidently. The effect of tying wire on improving the fruit-setting rate was not as good as girdling and the effect on the endohormone contents had not obvious difference with control. At the same time, there were some shortcomings in the method of tying wire, so that this method could not be used on Dongzao.