沙田柚是果中珍品,驰名中外,但在栽培过程中往往出现落花落果现象,给生产带来一定的损失。今将沙田柚的落花落果原因及其防治措施简述如下: 落花原因 1、无人工授粉。沙田柚有自花不实(不亲和性)的习性,不进行人工授粉,子房无法膨大发育成果实。所以,花而不实。 2、树体养分不见。主要是矿质营养不足,特别是缺少氮、镁、铁、铜、锰、锌、磷、钾、硼等,造成有机养分缺乏而引起落花。 3、低温和光照不足。低温影响花粉母细胞的减数分裂以及花粉粒的萌发和花粉管伸长.其次影响酶促反应;气孔关闭,CO_2无法进入,加上早春光照 Shatian pomelo is the fruit of the treasures, well-known at home and abroad, but often in the cultivation process of falling flowers and fruits, to produce some loss. This will fall Shatian pomelo fall and fall causes and prevention measures are as follows: Fall reasons 1, no artificial pollination. Shatin pomelo with self-deprecating (not affinity) habits, without artificial pollination, ovary can not expand the development of fruit. So, flowers are not real. 2, tree nutrients not seen. Mainly lack of mineral nutrition, especially the lack of nitrogen, magnesium, iron, copper, manganese, zinc, phosphorus, potassium, boron, resulting in a lack of organic nutrients and cause falling. 3, low temperature and lack of light. Low temperature affected meiosis of pollen mother cells and pollen germination and pollen tube elongation, followed by enzymatic reaction, stomatal closure, CO 2 inaccessibility, and early spring light