龙眼控梢催花和保花保果的技术

进行了龙眼控梢催花和保花保果技术开发研究,研制出“龙眼四季催花灵”药剂及龙眼控梢催花剂2号。“龙眼四季催花灵”的最佳处理量为树冠每米直径施用140g,土施该药剂10d后叶面喷施本所配制的龙眼控梢催花剂2号,在不同季节、不同气候类型区、不同土壤类型区对不同品种、不同树龄的龙眼进行催花,并配合常规的保花保果等管理技术措施。试验结果表明:小区的开花株率达100%,大田示范区的开花株率达95%以上,平均枝条开花率达74.5%;盛产期果园平均每公顷11.25t以上,每公顷比常规催花技术增产8805kg以上,每公顷新增利润135000多元;且反季节催花的经济效益比正常季节高,每公顷利润增加67.27%。施用广东农科院果树所生产的龙眼控梢促花剂及华南农业大学配制的龙眼控梢催花素1号均无催花作用,与对照一样均不开花。

Development of Flower Forcing Techniques for Longan (Dimocarpus longan Lour.)

Flowers of longan(Dimocarpus longan Lour.)were forced to flower by using different chemicals in different seasons,different climates and soils.A flower-forcing agent for longan,which can be used throughout the year,was developed.The most ideal application rate of the agent was140g per meter diameter of tree crown.Ten days after the agent was applied to the soil,another agent was sprayed to the leaves,combined with the conventional practices.The results showed that the plant flowering rate was100%in the plots,and above95%in the fields.The average branch flowering rate was74.5%.The yield during the peak period was over11.25tons/hm 2 which was8,805kg more than the conventional flower forcing treatment,producing an additional profit of over RMB135,000yuan/hm 2 .