果树开花后,经过授粉,子房逐渐膨大而发育成果实,在生产上称为“坐果”。但是,果树开的花并不能完全发育成果实,一部分花由于授粉不好而脱落;而授粉后,一部分幼果因营养不良或其他原因影响也会脱落,这种现象就叫果树的落花落果。 After flowering fruit trees, after pollination, the ovary gradually expand and develop fruit, in production known as the “fruit set.” However, the flowers of fruit trees do not fully develop into fruits, and some flowers fall off due to poor pollination. After pollination, some young fruits also fall off due to malnutrition or other reasons, which is called fruit drop.