果树开花的授粉受精,是增加结实和繁衍后代的必经过程。在果树中,有的树种和品种能自花结实和自花受孕(产生种子),如桃、杏、柑桔中的多数品种;有的自花能结实,但不能孕,如温州蜜柑、华盛顿脐橙和葡萄中的无核单性结实品种;有的自花结实和受孕力均低,或甚至不实不孕,如苹果、梨、李、柚、栗的大部分品种和甜樱桃的全部品种。 Fruit tree flowering pollination fertilization, is to increase the strong and multiply offspring of the necessary process. Some of the tree species and varieties in the fruit trees are self-fertile and self-fertile (producing seeds), such as most varieties of peach, apricot and citrus; some are self-prickly but not pregnant, such as Satsuma, Washington Navel orange and grapes in the non-nuclear single-species varieties; some self-fertility and fertility are low, or even false infertility, such as apple, pear, plum, pomelo, most of the varieties and all varieties of sweet cherry .