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Reference: Agronomic performance of Cabernet Sauvignon with leaf removal management in a high-altitude region of Southern Brazil
Key Statements

Abstract-

The objective of this work was to compare the effect of different times of leaf removal on the vegetative-productive efficiency and on the chemical and physical characteristics of 'Cabernet Sauvignon' clusters in a high-altitude region of the state of Santa Catarina, Brazil. The experiment was conducted in the 2015 and 2016 vintages, in a commercial vineyard, located in the municipality of São Joaquim, in the state of Santa Catarina, at 1,230-m altitude. The treatments consisted of different times leaf removal in the cluster zone, in the following phenological stages: full bloom, buckshot berries, pea-sized berries, veraison, and 15 days after veraison, besides a control without leaf removal. The evaluated variables were subjected to the analysis of variance and compared with the Scott-Knott test, at 5% probability. In a high-altitude region, leaf removal provides more adequate indices for plant vegetative:yield balance. It also increases yield when performed during the pea-sized berry and veraison stages, increases the fertility index when performed during the pea-sized berry stage, and improves the chemical composition of 'Cabernet Sauvignon' grape when performed up to the pea-sized berry stage. The obtained results show the importance of early leaf removal to obtain must with potential for the production of quality wines.

Original language-

Desempenho agronômico de 'Cabernet Sauvignon' com manejo de desfolha em região de elevada altitude no Sul do Brasil

O objetivo deste trabalho foi comparar o efeito de diferentes épocas de desfolha na eficiência vegeto-produtiva e nas características químicas e físicas dos cachos de 'Cabernet Sauvignon' em regiões de elevada altitude, em Santa Catarina. O experimento foi conduzido nas safras 2015 e 2016, em um vinhedo localizado no Munícipio de São Joaquim, SC, a 1.230 m de altitude. Os tratamentos consistiram em diferentes épocas de desfolha, na região dos cachos, nos seguintes estádios fenológicos: plena florada, baga chumbinho, baga ervilha, virada de cor das bagas e 15 dias após a virada de cor, além de testemunha sem desfolha. As variáveis avaliadas foram submetidas à análise de variância e comparados pelo teste de Scott-Knott, a 5% de probabilidade. Em região de altitude, a desfolha proporciona índices mais adequados de equilíbrio vegetativo:produtivo da planta. Também aumenta a produtividade quando realizada nos estádios fenológicos baga ervilha e virada de cor, aumenta o índice de fertilidade quando realizada no estádio fenológico baga ervilha e melhora a composição química da uva 'Cabernet Sauvignon' quando realizada até o estádio fenológico baga ervilha. Os resultados obtidos evidenciam a importância da desfolha precoce para obtenção de um mosto com potencial para elaboração de vinhos finos de qualidade.


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Link to paper-

http://www.scielo.br/scielo.php?pid=S0100-204X2017001000869&script=sci_arttext

http://dx.doi.org/10.1590/s0100-204x2017001000006


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Publication Details

Published: 2017
Publication: Pesquisa Agropecuaria Brasileira
Issue: 2017 52-10
Author: Wurz D A 2017
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