Papers by Cecilia Grallert
Ciencia E Tecnica Vitivinicola, 2021
Nova Scotia is characterized by cold climate and acidic soils and high organic matter for viticul... more Nova Scotia is characterized by cold climate and acidic soils and high organic matter for viticultural development. There is little scientific information available about the nutritional management of grapevine varieties cultivated under cold climate conditions even in Nova Scotia. This study carried out in three seasons aimed to find correlations between tissue nutrients with yield and must composition in order to provide better nutritional management for a given variety. The yield of "L'Acadie" variety was correlated with B, K and Mg. In this variety, Ca to Mg ratio could be an interesting indicator of yield. The yield of "New York Muscat" variety was correlated with Zn, while N, P and K was related to bunch weight and weight of berries. Interspecific hybrids presented lower accumulation of B in their tissues than V. vinifera varieties. Zn and Fe were found as determinant micronutrients in "Chardonnay" variety. "Riesling" variety accumulated high levels of K in their tissues even over the optimal values recommended for grapevines. K to Ca ratio could be an important indicator of yield in "Pinot Noir" variety. A strong correlation between the petiole and blade analysis was found in macro and micro-nutrients. These results may contribute to improve the nutritional management of grapevines grown under cold climate conditions, mostly in Nova Scotia. A Nova Escócia é caracterizada por um clima frio e solos ácidos com teores elevados de matéria orgânica, condições onde ocorre a cultura da vinha. Existe pouca informação científica disponível sobre a nutrição e fertilização da vinha cultivada em climas frios. Este estudo, realizado em três vindimas, teve como objetivo encontrar correlações entre os nutrientes dos pecíolos e limbos com a produção e a composição do mosto, a fim de proporcionar uma melhor gestão nutricional para algumas variedades. A produção da variedade "L'Acadie" esteve associada aos teores foliares de B, K e Mg. Nesta variedade, a relação Ca/Mg pode ser um indicador interessante da sua produtividade. A produção da variedade "New York Muscat" demonstrou estar relacionada com o teor foliar de Zn, enquanto os teores de N, P e K foram associados ao peso do cacho e ao peso dos bagos. Híbridos interespecíficos apresentaram menor acumulação de B nos seus tecidos em comparação com as variedades de V. vinifera. O Zn e o Fe foram identificados como micronutrientes determinantes em alguns parâmetros de qualidade do mosto na variedade "Chardonnay". A variedade "Riesling" acumulou altos níveis de K nos seus tecidos, mesmo acima dos valores ideais recomendados para videiras. A razão K/Ca pode ser um indicador importante da produção na variedade "Pinot Noir". Encontrou-se uma forte correlação entre a composição em macro e micronutrientes do pecíolo e do limbo. Os resultados obtidos podem contribuir para uma melhor nutrição das vinhas cultivadas em climas frios, principalmente na Nova Escócia.
Horticulturae, Sep 6, 2021
Ciência e Técnica Vitivinícola, 2021
Nova Scotia is characterized by cold climate and acidic soils and high organic matter for viticul... more Nova Scotia is characterized by cold climate and acidic soils and high organic matter for viticultural development. There is little scientific information available about the nutritional management of grapevine varieties cultivated under cold climate conditions even in Nova Scotia. This study carried out in three seasons aimed to find correlations between tissue nutrients with yield and must composition in order to provide better nutritional management for a given variety. The yield of “L’Acadie” variety was correlated with B, K and Mg. In this variety, Ca to Mg ratio could be an interesting indicator of yield. The yield of “New York Muscat” variety was correlated with Zn, while N, P and K was related to bunch weight and weight of berries. Interspecific hybrids presented lower accumulation of B in their tissues than V. vinifera varieties. Zn and Fe were found as determinant micronutrients in “Chardonnay” variety. “Riesling” variety accumulated high levels of K in their tissues even ...
Horticulturae, 2021
1) Background: Cold-hardy interspecific hybrid grapes (CIHG) are well adapted to the Annapolis Va... more 1) Background: Cold-hardy interspecific hybrid grapes (CIHG) are well adapted to the Annapolis Valley edaphoclimatic conditions. The main characteristics of CIHG are the high bud hardiness tolerance to winter frost, the short growing cycle, and the good tolerance to cryptogamic diseases. Based on local experience, the Vitis vinifera varieties should be grown in the warmest areas of the Annapolis Valley (Nova Scotia, Canada). Despite this, there is little scientific evidence that shows the viticultural behavior of these varieties under the edaphoclimatic conditions of this valley. (2) Methods: Thus, the aim of this research was to evaluate the viticultural behavior of two CIHG (L'Acadie and New York Muscat) and three V. vinifera varieties (Chardonnay, Riesling, and Pinot Noir) growing in the Annapolis Valley over three consecutive seasons. (3) Results: The coldest season (2019) produced a delay in grapevine phenology of at least 18 days for budburst compared to the warm seasons (2017 and 2018). In addition, in the coldest season from budburst to bloom the duration decreased compared to the rest of the seasons. The main phenological stages started earlier in L'Acadie than in the V. vinifera varieties. L'Acadie presented lower N petiole content than the V. vinifera varieties, which conditioned shoot growth in the studied seasons. CIHG presented low B petiole levels and produced musts with low malic acid content, while V. vinifera varieties produced musts with high N content. L'Acadie was the only variety that could bud out, and differentially produced fruit after the spring frost of -2 to -3 • C for 2 h in 2018 in this trial. (4) Conclusions: L'Acadie, and to a lesser extent, Riesling, hold an interesting adaptation to the edaphoclimatic conditions of the Annapolis Valley.
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Papers by Cecilia Grallert