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Caraterização de castas de importância regional dentro da sub-região vitivinícola de Portalegre
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Advisor(s)
Abstract(s)
O mundo da viticultura está permanentemente em mudança, havendo atualmente a
preocupação de produzir vinhos diferenciados, que supreendam os consumidores, e
preparar as vinhas para o desafio das alterações climáticas. Nesse sentido, as castas
antigas, muitas delas quase abandonadas, têm sido alvo de diversos estudos, surgindo do
passado como novas oportunidades. Este trabalho pretende caracterizar alguns clones
regionais dessas castas antigamente usadas na subregião vitivinícola de Portalegre. Na
Quinta da Cabaça, do concelho de Portalegre, foram estudadas 5 castas tintas (Periquita,
Grand Bouschet, Grand Noir, Aragonez, Trincadeira) e 6 castas brancas (Assario,
Roupeiro, Manteúdo, Fernão Pires, Tamarez, Arinto de Alcobaça), em amostras de 24
videiras por casta. Entre março e junho de 2022, foram registadas as datas de ocorrência
dos estados fenológicos, 2 a 3 vezes por semana, usando a escala de Baggiolini. Foram
também contados e medidos, por videira, os lançamentos anuais, no estado fenológico
G, e o número de cachos, no estado fenológico L. Para avaliação da precocidade foram
calculadas as somas de temperatura para alcançar cada estado fenológico e comparados
os dias do ano em que cada casta atingiu determinado estado. Para cada casta, foi feita
uma estimativa da produção de uvas por hectare, usando a metodologia das
componentes de rendimento. As castas brancas mostraram-se mais precoces e
apresentaram valores médios superiores no que toca ao comprimento dos lançamentos
anuais e dos cachos, bem como da produção por hectare, distinguindo-se a casta Assario
com uma produção potencial de 16,7 t/ha. As castas tintas, apesar de valores médios
superiores quanto a número de lançamentos e de cachos por videira, apresentaram
valores de produção mais baixos, sendo exceção a casta Grand Noir com uma produção
estimada de 11,6 t/ha. De referir que as castas brancas Fernão Pires e Tamarez
apresentaram produções potenciais estimadas em torno às 9,0 t/ha. Estes números são
bastante expressivos, tendo em conta o facto da vinha não ser regada. Haverá que
repetir este estudo, durante mais 2 ou 3 campanhas, para confirmar os valores
registados. É de extrema importância que se conheçam e estudem estas castas antigas
com importância, neste caso, para a região de Portalegre tendo em conta o paronama
atual da viticultura.
The world of viticulture is constantly changing, and there is currently a concern to produce differentiated wines that surprise consumers and prepare vineyards for the challenge of climate change. In this sense, the old varieties, many of them almost abandoned, have been the subject of several studies, emerging from the past as new opportunities. This work intends to characterize some regional clones of these varieties formerly used in the wine-growing subregion of Portalegre. At Quinta da Cabaça, in the municipality of Portalegre, 5 red varieties (Periquita, Grand Bouschet, Grand Noir, Aragonez, Trincadeira) and 6 white varieties (Assario, Roupeiro, Manteúdo, Fernão Pires, Tamarez, Arinto de Alcobaça) were studied in samples of 24 vines per variety. Between March and June 2022, the dates of occurrence of the phenological stages were recorded, 2 to 3 times a week, using the Baggiolini scale. The annual branches, in the phenological state G, and the number of bunches, in the phenological state L, were also counted and measured, per vine. To evaluate the precocity, the sums of temperature to reach each phenological state were calculated and the days of the year were compared when each variety reached a certain state. For each variety, an estimate was made of the grape production per hectare, using the yield components methodology. The white varieties were more precocious and presented higher average values in terms of the length of the annual releases and of the bunches, as well as the production per hectare, with the Assario variety being distinguished with a potential production of 16.7 t/ha. The red varieties, despite higher average values in terms of the number of launches and bunches per vine, showed lower production values, with the exception of the Grand Noir variety with an estimated production of 11.6 t/ha. It should be noted that the white varieties Fernão Pires and Tamarez presented potential yields estimated at around 9.0 t/ha. These numbers are quite expressive, taking into account the fact that the vineyard is not irrigated. This study will have to be repeated for another 2 or 3 campaigns to confirm the values recorded. It is extremely important to know and study these ancient varieties with potencial, in this case, for the region of Portalegre, taking into account the current context of viticulture
The world of viticulture is constantly changing, and there is currently a concern to produce differentiated wines that surprise consumers and prepare vineyards for the challenge of climate change. In this sense, the old varieties, many of them almost abandoned, have been the subject of several studies, emerging from the past as new opportunities. This work intends to characterize some regional clones of these varieties formerly used in the wine-growing subregion of Portalegre. At Quinta da Cabaça, in the municipality of Portalegre, 5 red varieties (Periquita, Grand Bouschet, Grand Noir, Aragonez, Trincadeira) and 6 white varieties (Assario, Roupeiro, Manteúdo, Fernão Pires, Tamarez, Arinto de Alcobaça) were studied in samples of 24 vines per variety. Between March and June 2022, the dates of occurrence of the phenological stages were recorded, 2 to 3 times a week, using the Baggiolini scale. The annual branches, in the phenological state G, and the number of bunches, in the phenological state L, were also counted and measured, per vine. To evaluate the precocity, the sums of temperature to reach each phenological state were calculated and the days of the year were compared when each variety reached a certain state. For each variety, an estimate was made of the grape production per hectare, using the yield components methodology. The white varieties were more precocious and presented higher average values in terms of the length of the annual releases and of the bunches, as well as the production per hectare, with the Assario variety being distinguished with a potential production of 16.7 t/ha. The red varieties, despite higher average values in terms of the number of launches and bunches per vine, showed lower production values, with the exception of the Grand Noir variety with an estimated production of 11.6 t/ha. It should be noted that the white varieties Fernão Pires and Tamarez presented potential yields estimated at around 9.0 t/ha. These numbers are quite expressive, taking into account the fact that the vineyard is not irrigated. This study will have to be repeated for another 2 or 3 campaigns to confirm the values recorded. It is extremely important to know and study these ancient varieties with potencial, in this case, for the region of Portalegre, taking into account the current context of viticulture
Description
Keywords
Vinha Viticultura Estados Fenológicos Produção Uva Vineyard Viticulture Phenological States Wine Production
Citation
Afonso, D.C.(2022). Caraterização de castas de importância regional dentro da sub-região vitivinícola de Portalegre. Escola Superior Agrária de Elvas
Publisher
Escola Superior Agrária de Elvas