Answer: 1 to 2 months after the harvest of sweet cherry fruits is the flower bud differentiation period. The flower bud differentiation of sweet cherry has the characteristics of time concentration and rapid differentiation process. Since the differentiation process of sweet cherry flower buds is concentrated and the differentiation process is fast, the nutrient conditions of the tree are relatively high. Malnutrition affects the quality of flower bud differentiation, resulting in a decrease in fruit setting rate. High temperature in summer and autumn, long sunshine time, and less precipitation are beneficial to flower bud differentiation. On the contrary, lower temperature after fruit harvest and poor sunshine will affect the differentiation of flower buds and the yield of the following year. Have adverse effects. In the case of malnutrition, the development quality of flower buds is poor, and the phenomenon of male and female degeneration often occurs. The degenerated flower bud has a very short stigma, shrinks before fertilization, and has no fertilization capacity.
In order to promote the differentiation of flower buds, in addition to strengthening fertilizer and water management after fruit harvesting, water should be properly watered in spring and autumn to ensure the late nutrition of flower bud differentiation. The differentiation of sweet cherry flower buds is very sensitive to boron. When the supply of boron is insufficient, the growth of flower buds will cause only flowering but no fruit. Therefore, it is necessary to increase the application of boron fertilizer in time, such as spraying 0.3% borax on the leaf surface.
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