负载量及套袋对酒用刺葡萄果实酚类物质和香气的影响

以刺葡萄（Vitis davidii）中的甜葡萄为材料，研究负载量及套袋对果实酚类物质和香气物质的影响，以期为高质量酒用刺葡 萄的生产提供理论基础。结果表明，不同负载量处理的果实总酚、总花色素和总黄烷醇含量虽然存在年份间的差异，但总体上低负载 量（1 300 kg/亩）和中负载量（1 900 kg/亩）显著高于高负载量（2 500 kg/亩）（P＜0.05）；果实香气物质含量及种类均随负载量的降低而 增加。 除少数处理外，不套袋处理的果实总酚、总花色素、总黄烷醇含量及果实香气种类和总含量显著高于套袋（P＜0.05）。 不套袋、 低负载量处理表现最优，显著地提高了果实总酚、总花色苷、总黄烷醇含量（P＜0.05），对香气总量和醛酮类物质均有显著的提升作 用（P＜0.05）。 因此刺葡萄低负载量（结果枝平均留1个果穗）和果实不套袋是生产刺葡萄酒果实的最佳方案。

Effects of loading capacity and bagging on phenolic and aroma components in Vitis davidii

Using Tian grapes in Vitis davidii as materials, the effect of loading capacity and bagging on phenolic and aroma components of the grape were studied, in order to provide a theoretical basis for the production of high-quality V. davidii and brewing the high-quality wines. The results showed that although the total phenol, total anthocyanin and total flavanol contents of fruits treated with different loading capacities were different between years, low loading capacity (1 300 kg/667 m2) and medium loading capacity (1 900 kg/667 m2) treatments were significantly higher than high loading capacity (2 500 kg/667 m2) (P＜0.05). The aroma content and types of fruits increased with the decrease of the loading capacity. Except for a few treatments, the contents of total phenol, total anthocyanin, total flavanol, aroma types, and total aroma content of the ones without bagging treat- ment were significantly higher than bagging treatment (P＜0.05). No bagging and low loading capacity treatment were the optimal, which significant- ly increased contents of total phenols, total anthocyanin, and total flavanol of fruits (P＜0.05), and significantly increased the contents of total aroma, aldehydes and ketones (P＜0.05). Therefore, low loading capacity (leaving average 1 cluster in the bearing shoot) and no bagging were the optimal solu- tion for the production of V. davidii.