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Interaction between fertilization and mechanical winter pruning of grapevine. Effects on plants yield and grape composition

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Resumo:This work aimed to understand how the interaction between mechanical pruning (MEC) and organic fertilization of the vine with municipal solid waste compost (MSW) can bring benefits from the productive point of view in terms of yield and quality of grapes and vegetative growth of the plant. The study was carried out at Quinta do Gradil, Vilar, Cadaval, in the wine region of Lisbon, in a Sauvignon Blanc vineyard, in a strip-plot design with 2 factors under study: i) pruning system, with 2 systems (mechanical pruning in hedge and manual pruning) and ii) dose of MSW compost, with 4 doses (0, 5000, 10000 and 20000 kg ha-1). The experiment was installed in 2018. We present only the results of the 2020 vintage. The results obtained showed that the mechanical pruning significantly increased the number of bunches, without changing their weight, also increasing the yield per plant. Mechanical pruning also affected the composition of the grapes. The grapes from mechanically pruned grapevines had a higher probable alcohol content (PAC), slightly higher pH and less total acidity, when compared to grapes from manual pruning. Regarding the application of MSW compost, there were no significant differences in the parameters evaluated, except in the content of assimilable N in the grapes, which tended to be higher in the treatments with MSW compost, due to the availability of nitrogen from this organic fertilizer. The interaction between the factors under study was not significant, for all parameters evaluated. Mechanical pruning and fertilization with MSW compost may have a positive effect on vineyards, not only due to the increase in yield, but also due to the economic gain due to the reduction of labor with pruning and, also, for the environmental benefit thanks to the recycling of MSW
Autores principais:Rosso, Giacomo
Assunto:mechanical pruning urban solid waste (MSW) vegetative-reproductive balance production yield grape quality
Ano:2021
País:Portugal
Tipo de documento:dissertação de mestrado
Tipo de acesso:acesso aberto
Instituição associada:Universidade de Lisboa
Idioma:inglês
Origem:Repositório da Universidade de Lisboa

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