据调查,在正常情况下,每年的落果量约占总产量的10％,是一笔不小的损失。其落果原因为:1、养分不足。在果实迅速发育时期和新梢、根系生长旺盛期,需要消耗大量的养分,此时,枝叶生长与果实生长就出现争夺养分的矛盾,如果树体营养不足,矛盾加剧,引起落果。2、是人工授粉不当。如果授粉的时间掌握不当或采用过嫩甚至变质发霉的雄花,则受精不良,导致败 According to the survey, under normal circumstances, the annual drop of about 10% of total output, is a small loss. The reason for the drop: 1, lack of nutrients. In the period of rapid fruit development and shoots, the root system grows exuberantly and needs to consume a large amount of nutrients. At this time, the contradictions of nutrient competition arise between the growth of the branches and the growth of fruits. If the tree is undernourished and the contradiction is aggravated, fruit drop results. 2, is artificial pollination improper. If the pollination time is improperly mastered, or too young or even moldy male flowers, poor fertilization, resulting in defeat