Abstract Date palm is a dioecious tree that bearing male and female inflorescence on separate trees. Although pollination of date palm occurs naturally, in order to guarantee productivity, the artificial pollination can be carried out in commercial date farms. Up to now, an efficient mechanical pollinator has not been developed, and pollination is still carried out manually in most date farms. In this regard, an ultra-light, efficient electrical date palm pollinator was designed and developed consists of a ducted fan, a body and container composed of light polyethylene terephthalate (PET), and a 6.5 m long boom, which was made from carbon fiber. The apparatus overall weight was less than 2 kg, which makes the apparatus as a portable machine to sprinkle pollen/pollen-flour blend. The container had the capacity of approximately 70 g pollen, which could pollinate up to 140 trees in each charge. The pollinator performance was evaluated on the Mazafati cultivar by the aid of a complete randomized designed experiment with five pollinated treatments (traditional, 0.5 g pollen, 2.5 g pollen, 5.5 g pollen-flour blend, and 2.5 g pollen with no repetition) and a non-pollinated treatment. Furthermore, the pollination and fruit setting efficiencies, pollen consumption index (fruits/g pollen), and the airflow characteristics of the pollinator were determined. Therefore, a model was introduced to determine the required pollen or blend (pollen-flour) mass flow rate as a function of discharged air velocity. According to findings, no significant difference was noted regarding the pollination and fruit setting efficiencies among five pollination treatments (p-value

中文翻译：

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涵道扇形枣椰树（Phoenix dactylifera L.）传粉者的设计、开发和性能评估

摘要 枣椰树是雌雄异株的乔木，在不同的树上有雄花和雌花。虽然枣椰树的授粉是自然发生的，但为了保证生产力，可以在商业枣园进行人工授粉。迄今为止，还没有研制出高效的机械授粉机，大多数枣园仍采用人工授粉。在这方面，设计和开发了一种超轻、高效的电动枣椰树授粉器，它包括一个管道风扇、一个由轻质聚对苯二甲酸乙二醇酯 (PET) 组成的主体和容器，以及一个 6.5 m 长的由碳纤维制成的吊臂. 该装置的总重量小于 2 公斤，这使得该装置成为一种用于喷洒花粉/花粉-面粉混合物的便携式机器。容器有大约 70 克花粉的容量，每次充电最多可以为 140 棵树授粉。借助具有五种授粉处理（传统的 0.5 g 花粉、2.5 g 花粉、5.5 g 花粉-面粉混合物和 2.5 g 花粉，无重复）的完整随机设计实验，对 Mazafati 栽培品种的授粉性能进行了评估。非授粉处理。此外，还测定了授粉和坐果效率、花粉消耗指数（果实/克花粉）和传粉媒介的气流特性。因此，引入了一个模型来确定所需的花粉或混合（花粉-面粉）质量流量作为排出空气速度的函数。根据研究结果，五种授粉处理之间的授粉和坐果效率没有显着差异（p值