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苹果树的花序开花期不同,自然座果率也有差异。一般早期花座果率高于中期花,中期花又高于晚期花。用人工授粉的方法能提高座果率,但因有效期较短,多数品种从开花第三天后授粉座果率明显下降。金冠品种开花第四天人工授粉座果率仍高达90％,而国光品种花后第三天授粉,座果率仅有10％。为保证人工授粉有较高的座果率,在宁夏的自然条件下,应在花朵开放三天之内授粉。
Inflorescence flowering apple tree different, natural fruit rate is also different. In general, the early fruiting rate is higher than the mid-flowering flower, while the mid-flowering flower is higher than the late flowering flower. The method of artificial pollination can improve the fruit set rate, but due to the short effective period, the majority of varieties from the third day after flowering decreased significantly. The golden crown varieties flowering the fourth day of artificial pollination fruit rate is still as high as 90%, while Guoguang varieties after pollination on the third day, fruit set rate of only 10%. In order to ensure artificial fruit pollination has a higher fruit rate, under natural conditions in Ningxia, pollination should be opened within three days of the flower.