针对甘肃省河西地区美国杏李‘风味玫瑰’落果现象严重的问题,以7年生‘风味玫瑰’为试材,观察总结其落果规律,通过喷施叶面肥和植物生长调节剂2种保果措施来减少‘风味玫瑰’落果量。结果表明,‘风味玫瑰’有2个落果高峰期:幼果期和果实成熟期,其中果实成熟期落果率明显高于其他生长发育期;在果实不同生长期叶面喷施50 mg/L赤霉素和0.5%尿素均能显著减少落果,增加种植效益。 Aiming at the serious problem of falling fruit of American apricot Li ’Flavor Rose’ in Hexi region of Gansu Province, taking the 7 - year - old ’Flavor Rose’ as test material, the law of falling fruit was observed and observed. Two kinds of fruit preservatives such as foliar fertilizer and plant growth regulator Measures to reduce the amount of ’flavored rose’ drop. The results showed that there were two peak peach fruiting stages in fructification: the young fruit stage and fruit ripening stage, the fruitsetting rate of fruit ripening stage was significantly higher than other growth and development stages; spraying 50 mg / L red Inoculation with 0.5% urea and urea significantly reduced fruit drop and increased planting efficiency.