Vitis Labrusca L. grapes cultivars under hydric stress in protected cultivation

Abstract The expansion of the Brazilian wine border, combined with the development of new cultivars adapted to different regions, highlight the need for more information on irrigation handling for new cultivars in protected cultivation. Therefore, this study aimed to evaluate grapevine cultivars submitted to different percentages of water replacement in the soil in conditions of the Southern region of Minas Gerais with the use of irrigation. The experiment was installed and developed from 2014 to 2016. The experimental design used was random blocks, with five replicates and the treatments were disposed in subdivided plots, with three replacement percentages (30, 50 and 100 % of necessary water replacement for this type of soil) and in the subplots four grapevine cultivars belonging to Vitis labrusca L species. (‘Isabel’, ‘Isabel Precoce’, ‘BRS-Cora’ and ‘BRS-Violeta’). The research concluded that these cultivars increased 75 % the bunch length, 71 % of the bunch weight, 39 % the production of bunch of grapes, 52 % the pH, 84 % the soluble solid content and 60 % the reduction of total acidity content, 60 % to 100 % of water replacement. ‘Isabel precoce’ cultivar in water deficit conditions obtained the best productive results.

摘要 巴西葡萄酒产业的扩张，加之适配不同产区的酿酒葡萄新品种培育工作的推进，使得设施栽培条件下酿酒葡萄新品种的灌溉管理技术相关信息需求愈发凸显。为此，本研究旨在依托灌溉措施，在米纳斯吉拉斯州南部地区的土壤环境中，评估不同土壤补水比例下的酿酒葡萄品种表现。本试验于2014年至2016年间开展实施。试验采用随机区组设计，设置5次重复；处理因子采用裂区布置：主区设置3个土壤补水比例梯度（分别为该类型土壤所需灌水量的30%、50%及100%），副区则种植4个属于Vitis labrusca L（美洲葡萄）的酿酒葡萄品种，分别为‘伊莎贝尔（Isabel）’、‘早伊莎贝尔（Isabel Precoce）’、‘BRS-Cora’及‘BRS-Violeta’。研究结果表明，当补水比例处于60%至100%区间时，供试品种的果穗长度提升75%、果穗重量提升71%、葡萄果穗产量提升39%，pH值提升52%，可溶性固形物含量提升84%，总酸含量降低60%。其中，早伊莎贝尔（Isabel Precoce）品种在水分亏缺条件下仍可获得最优的生产性能表现。