Year-end Sale % OFF 
Abstract
ABSTRACT: The objective of this study was to evaluate the productive performance and physicochemical characteristics of ‘BRS Magna’ and ‘Isabel Precoce’ grapes influenced by two types of pruning. The experiment was carried out during two growing seasons in a commercial vineyard of Petrolina, PE, in the period 2013-2014. Treatments were represented by two cultivars, ‘Isabel Precoce’ and ‘BRS Magna’, and two types of pruning, with selection during plant formation (P1) and without selection (P2) of lateral branches, using a randomized experimental block design, in subdivided plots and four replicates. After pruning P2, the amount of buds kept on vines was greater than after pruning P1, favoring an increase in yield. However, the sizes of bunches and berries, content of soluble solids, and titratable acidity were not influenced by the pruning type. In general, the sizes of bunches and berries in ‘BRS Magna’ were larger than in the ‘Isabel Precoce’ cultivar. Conversely, content of soluble solids and titratable acidity varied among cultivars as a function of production cycle and type of pruning; however, within the standards described for both cultivars and accepted by the Brazilian legislation.
Highlights
In recent years, the production of grape juice in Brazil showed a growth, especially the integral (33-52 million liters) and concentrated (156-178 million liters) juices (MELLO, 2016)
There are at least six companies in this region, which produce concentrated and integral grape juices from the ‘Isabel Precoce’ and other (‘BRS Magna’, ‘BRS Cora’, and ‘BRS Violeta’) cultivars developed by the grape genetic breeding program at Embrapa
Results presented in tables 2 and 3 indicated that a significant interaction between cultivars and pruning types occurred in each cultivar during two production cycles
Summary
The production of grape juice in Brazil showed a growth, especially the integral (33-52 million liters) and concentrated (156-178 million liters) juices (MELLO, 2016). The state of Rio Grande do Sul is responsible for 90% of the national supply of this beverage. Other regions, such as the municipality of Novo Mutum (MT), have emerged in the Brazilian scenario in the last five years, and the semiarid region in the sub-middle region of the São Francisco river stands out. There are at least six companies in this region, which produce concentrated and integral grape juices from the ‘Isabel Precoce’ and other (‘BRS Magna’, ‘BRS Cora’, and ‘BRS Violeta’) cultivars developed by the grape genetic breeding program at Embrapa. The ‘Isabel’ cultivar and its mutant ‘Isabel Precoce’ are the basic raw material to make grape juice in Brazil. The must color of this cultivar is more intense than that of ‘Isabel’, its original form (CAMARGO, 2004)
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