不同时期疏花疏果对红富士苹果花序坐果率和果实品质的影响

以24年生的红富士苹果为试材，在花序分离至铃铛花期、盛花期、盛花后7天和盛花后15天以间距20em进行一次性疏花疏果并定单果试验。结果表明：疏花疏果时间越早，坐果率和果实品质各项指标表现越好，以花序分离期至铃铛花期进行一次性疏花效果最为显著，其花序坐果率、单果重、着色指数、光洁度指数、果实去皮硬度、可溶性固形物和可溶性糖含量分别比对照提高16．8％、20．96％、14．44％、13．58％、4．55％、6．39％和13．87％；可滴定酸含量略高于疏果晚的处理和对照。

Effects of Flower and Fruit Thinning at Different Stages on Fruit Setting Rate of Inflorescence and Fruit Quality of Red Fuji Apple

Using 24 - year - old red Fuji apple trees as materials, one - time flower and fruit thinning and keeping single fruit experiment with 20 cm spacing was conducted at early balloon to balloon stage, full - bloom stage, 7 days and 15 days after blooming respectively. The results showed that the earlier flower and fruit thinning was conducted, the better the fruit setting rate of inflorescence and fruit quality were. One - time flower and fruit thinning at early balloon to balloon stage had the most significant effect, whose fruit setting rate of inflorescence, single fruit weight, coloring index, smooth finish index, peeling flesh firmness, soluble solid and soluble sugar content increased by 16.8%, 20.96%, 14.44%, 13.58%, 4.55%, 6.39% and 13.87% respectively compared to those of control. And the fruit thinning treatment and control titratable acid content was slightly higher than those of late