The low fruit rate of jujube is mainly caused by nutrient growth and reproductive growth, and its jujube growth, flower bud differentiation, flowering and fruit setting go hand in hand. Secondly, the jujube tree requires a relatively high air humidity during the flowering and fruiting period, while the northern jujube area is in a dry season and will have an adverse effect on the fruit setting.
Therefore, increasing the fruit setting rate must start with increasing nutrient levels, especially the supply of organic nutrients and improving the environmental conditions of pollination and fertilization. The main technical measures are flowering period (ie, ring peeling), flowering gibberellin (10 ~ 30 μg / ml are effective), spraying trace elements (boron, molybdenum, alumina elements, etc.), water spray, jujube topping Or spray growth inhibitors (PP333, chlormequat) and so on.
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