Organic amendments application to soil of mechanically pruned vineyards: effects on yield and grape composition of cultivar 'Syrah' (Vitis vinifera L.)
The effect of three different soil organic amendments on vine performance and wine quality of mechanically box pruned vineyards was evaluated from 2012 until 2015. Two field trials, with a randomized complete block design, were established on 'Syrah' vineyards at Quinta do Côro (QC) and Quinta do Gradil (QG), Tejo and Lisboa wine regions respectively. Organic amendments - municipal solid waste compost (MSWC) and cattle manure (Manure) - were applied annually, in an amount corresponding to 5000 kg of dry organic matter per hectare. In year 1 (2012) no effects were found. In the following years Manure and MSWC originated higher yields than Control (Ctrl). In year 2 those differences were associated with the cluster weight, while in years 3 and 4 both the number of clusters per vine and their individual weight concurred for the higher yields observed. The pruning weight per vine was higher in Manure, comparing to Ctrl, in years 2 and 3. Manure and MSWC increased the vine total dry matter production. Regarding to grape composition, analyzed in years 2 and 3, globally, MSWC and Manure showed no significant differences when compared to Ctrl. MSWC and Manure improved yield without significant quality loss, proving to be good options for increase vineyard profitability.
Botelho, M., Cruz, A., Silva, E.B., Mexia, A., Ricardo-da-Silva, J., Castro, R. and Ribeiro, H. (2020). Organic amendments application to soil of mechanically pruned vineyards: effects on yield and grape composition of cultivar 'Syrah' (Vitis vinifera L.). Acta Hortic. 1276, 119-124
grapevine, climate changes, soil organic matter, municipal solid waste compost, cattle manure, quality