不同配比GA_3和CPPU对葡萄果实品质的影响

Effects of Different Proportions of GA_3 and CPPU on Fruit Qualities of Grape

[目的]研究不同配比GA_3和CPPU对"阳光玫瑰"葡萄果实品质的影响。[方法]以4年生"阳光玫瑰"葡萄为试验材料,探讨不同质量浓度、配比的赤霉素(GA_3)与N-(2-氯-4-吡啶基)-N'-苯基脲(CPPU)于盛花期和花后12 d对"阳光玫瑰"葡萄穗形、坐果率、果实膨大及品质的影响。[结果]各处理葡萄的单穗重与单粒重均显著增加,果品表面锈斑得到改善;低浓度GA_3与CPPU配比有利于拉长穗形,但对果形指数影响不明显;高浓度GA_3与CPPU配比会加粗穗梗直径,使果刷变短、变粗。GA_3和CPPU混合使用对可滴定酸影响不显著,但普遍降低了果实的可溶性固形物含量。[结论]"阳光玫瑰"葡萄在盛花期用40 mg/L GA_3+1 mg/L CPPU,盛花后12 d用50mg/L GA_3+5 mg/L CPPU处理效果最好。

[Objective] To research the effects of different proportions of GA3 and CPPU on fruit qualities of grape Shine Mascut. [Method]With 4-year-old grape‘Shine Muscat＇as the test materials,the effects of different mass concentrations and different ratios of gibberellin（ GA3） and CPPU on spike shape,fruit-setting rate,fruit enlarging and fruit quality of‘Shine Muscat＇grape were investigated at full-bloom stage and 12 d after full bloom. [Result]The single spike weight and single grain weight were both significantly increased,rust in fruit surface was improved; low concentrations of GA3 and CPPU was beneficial to elongate the panicle,but had no significant impacts on fruit shape index.High concentrations of GA3 and CPPU increased the coarseness of peduncle,and made the brush shorter and thicker. Mixture of GA3 and CPPU showed no significant effect on titratable acid,but reduced the soluble solid content of the fruit generally. [Conclusion]The best treatment for‘Shine Mascut＇grape was 40 mg/L GA3＋ 1 mg/L CPPU at full-bloom stage,and 50 mg/L GA3＋5 mg/L CPPU at 12 d after full bloom.