Cover cropping in a sloping, non-irrigated vineyard: 2 - effects on vegetative ...

• Author(s): Monteiro, Ana ; Lopes, Carlos ; Machado, J.P. ; Fernandes, N. ; Araújo, A.
• Date: 2008
• Persistent ID: http://hdl.handle.net/10400.5/1001
• Origin: Repositório da UTL
• Subject(s): grapevine; cover crops; growth; yield; quality; videira; crescimento; rendimento
• Document Type: Article
• Language: English

Description

Grapevine vegetative growth, yield, fruit composition and wine quality were studied in the Estremadura Winegrowing Region of Portugal in a ‘Cabernet Sauvignon’ slopping non-irrigated vineyard. During three seasons three treatments were compared: soil tillage (control), permanent resident vegetation, and permanent sown cover crop. When compared to soil tillage, the inter-row sward treatments displayed a lower predawn leaf water potential from bloom to mid-ripening. These differences in vine water status did not affect vine yield or berry sugar accumulation; however, in the third season after experiment setup it induced a significant reduction in vegetative growth in the sward treatments, compared to soil tillage. This vegetative growth reduction had a positive effect on grape composition by reducing titratable acidity and increasing berry skin total phenols and anthocyanins. Those differences were also detected in the wines by the judges who gave a better classification to the wines from the sward treatments. Our results indicate that cover cropping can be a valuable tool for controlling vigour and enhancing wine quality in this winegrowing region.