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
巴西葡萄酒种植区域的扩张，加之适配不同种植区域的葡萄新品种培育工作推进，凸显了针对设施栽培环境下新品种葡萄开展灌溉管理相关研究的必要性。为此，本研究旨在评估在米纳斯吉拉斯州南部灌溉栽培条件下，不同土壤补水比例对葡萄品种的影响。本试验于2014至2016年间开展并完成。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（分别为该类型土壤需水量的30%、50%和100%），裂区则种植4个属于美洲葡萄（Vitis labrusca L.）的品种：‘伊莎贝尔（Isabel）’、‘早红伊莎贝尔（Isabel Precoce）’、‘BRS-Cora’以及‘BRS-Violeta’。研究结果表明，当补水比例处于60%至100%区间时，各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‘早红伊莎贝尔（Isabel Precoce）’在水分亏缺处理下表现出最优的生产性能。