A: The sweet cherry fruit is 1 to 2 months after harvest, which is the flower bud differentiation period. The differentiation of sweet cherry flower buds has the characteristics of time concentration and rapid differentiation. Because the flower bud differentiation process of sweet cherry is concentrated and the differentiation process is fast, the nutrient conditions of the tree body are required to be higher. In malnutrition, affecting the quality of flower bud differentiation, resulting in reduced fruit setting rate, high temperature in summer and autumn, long sunshine hours, less rainfall, favorable for flower bud differentiation, on the contrary, the fruit temperature after harvest, poor sunshine bud differentiation and the following year's yield Has a bad influence. In the case of malnutrition, the developmental quality of flower buds is poor, and the phenomenon of degradation of both sexes often occurs. The stigma of the degenerate flower buds is extremely short, shrinking before fertilization, and has no ability to fertilize.
In order to promote flower bud differentiation, besides strengthening the management of fertilizer and water after harvesting fruit, watering should be carried out in spring and autumn in order 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 flower buds are not well developed, resulting in no flowering. Therefore, it is necessary to pay attention to the timely application of boron fertilizer, such as spraying 0.3% borax on the leaves.
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