疏果剂PD_3对鸭梨疏果效应的研究

Study on the effect of chemical fruit thinning agent on Yali pear

为明确疏果剂PD3对'鸭梨'疏果效应和疏果后的落果动态,对此进行了研究。结果表明:盛花后5d和10d对鸭梨喷布2000～3000mg/LPD3疏果剂,其疏果效应达到了生产上人工疏果要求;幼果脱落集中,能提早2周结束落果,可提高鸭梨平均果重及果品质量。

The fruit thinning effect of fruit thinning agent- PD3 with kinetics of blossoms removed and fruit drop was investigated on 'Yali' pear trees. The result showed that fruit thinning agent-PD_3 applied 5 days and 10 days after full bloom at concentrations 2 000～3 000 mg/L were satisfied to requirement of production. The young ovary dropped off were concentrated; drop fruit peak was moved up two weeks. The mean fruit weight at harvest was improved and the fruit quality were increased by the spray.