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新红星苹果早果丰产,优质美观,深受国内外消费者欢迎。但这一品种,往往因花期低温阴雨,坐果率极低,仅为2～5%。1994年4月中旬,连续数天阴雨,凡未进行人工辅助授粉的果园普遍减产。新红星苹果,花期温度低于15℃或阴雨,其完成受精的时间,便由常温下的24小时延长至3～4天,从而丧失了卵细胞的活力,不能完成受精过程而造成落花落果。
New Red Star Apple fruit early yield, high-quality appearance, welcomed by consumers at home and abroad. However, this variety, often due to low temperature rainy flowering, fruit setting rate is very low, only 2 to 5%. In mid-April 1994, the rainy days continued for several days, and the orchards that were not artificially assisted in pollination generally cut their output. New star apple, flowering temperature is below 15 ℃ or rainy season, the time to complete fertilization, it will be extended from 24 hours at room temperature to 3 to 4 days, thus losing the vitality of the egg cells, fertilization can not complete the process of descent.