Abad Zamora, Francisco Javier
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Abad Zamora
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Francisco Javier
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Ingeniería Eléctrica y Electrónica
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Publication Open Access Cover crops in viticulture. A systematic review (2): Implications on vineyard agronomic performance(International Viticulture and Enology Society (IVES), 2021) Abad Zamora, Francisco Javier; Hermoso de Mendoza, Irantzu; Marín Ederra, Diana; Orcaray Echeverría, Luis; Santesteban García, Gonzaga; Agronomía, Biotecnología y Alimentación; Agronomia, Bioteknologia eta ElikaduraThe present systematic review aims to provide an overview of the impact of cover crops on vegetative growth and the productive parameters of vineyards. A systematic review was made on Scopus-index journals dating from 1999 to 2018. The selection was made at the same time by two different researchers, who selected a total of 272 published papers related to cover crops in vineyards. Each article was categorised according to its theme and a metadata database was created, considering all relevant information from an agronomic point of view for each article. It can be concluded from the review that the use of cover crops can reduce vine vegetative growth, which in turn can help keep the incidence of fungal diseases (like grey mould) at a low level. In general, this practice does not have a clear effect on vineyard yield or grape juice parameters, like total soluble solids (TSS) or titratable acidity (TA). Cover crops can decrease vineyard pests to a certain extent, especially Cicadellidae. Cover crops can sometimes sporadically cause water stress in the vineyard, but only during the summer months. This review allowed us to summarise available information on cover crops and their effects on vineyard agronomic performance in a systematic way. Such information can be used to help select the most suitable cover, based on specific vineyard objectives and growing conditions.Publication Open Access Evaluation of the agronomic performance of 'Syrah' and 'Tempranillo' when grafted on 12 rootstocks(Julius Kühn Institute (JKI), 2019) Marín Ederra, Diana; García, R.; Eraso Zabalegui, Javier; Urrestarazu Vidart, Jorge; Miranda Jiménez, Carlos; Royo Díaz, José Bernardo; Abad Zamora, Francisco Javier; Santesteban García, Gonzaga; Agronomía, Biotecnología y Alimentación; Agronomia, Bioteknologia eta Elikadura; Gobierno de Navarra / Nafarroako Gobernua; Universidad Pública de Navarra / Nafarroako Unibertsitate PublikoaBeyond pest resistance, rootstocks significantly influence the performance of grapevine varieties. However, the effect of the rootstock is strongly affected by its interaction with the environment, and it is therefore necessary to evaluate their influence in a particular terroir. With the aim of evaluating the influence of 12 rootstocks on the agronomic performance of 'Syrah' and 'Tempranillo', a trial was established in 2011 and 2012 in Miranda de Arga (Navarra, Spain), under the typical environmental conditions of the Ebro Valley. Growth and yield, as well as industrial and phenolic maturity parameters were analysed during four consecutive seasons (2015-2018). Most rootstocks showed a similar performance with both varieties, not always following the trends reported in bibliography, which highlights the relevance of studying rootstocks in different conditions. 3309 C was the rootstock conferring the highest vigour, whereas the lowest were provided by 420 A MGt and 'Fercal'. The implications on grape composition were much more diverse, and were partially conditioned by yield. Results were obtained during the four first harvests of the vineyard, and could therefore change to some extent as the vineyard reaches stability.Publication Open Access Connection matters: exploring the implications of scion-rootstock alignment in grafted grapevines(Australian Society of Viticulture and Oenology, 2022) Marín Ederra, Diana; Santesteban García, Gonzaga; Dayer, S.; Villa Llop, Ana; Abad Zamora, Francisco Javier; Gambetta, Gregory A.; Torres-Ruiz, J. M.; Torres Molina, Nazareth; Agronomía, Biotecnología y Alimentación; Agronomia, Bioteknologia eta Elikadura; Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa; Gobierno de Navarra / Nafarroako GobernuaBackground and aims: grafting in viticulture has been essential since the advent of the phylloxera crisis at the end of the 19th century, but relatively little is known about the relevance of the quality of the connection at the grafting junction on the behaviour of grafted grapevines. Methods and results: an experimental procedure comparing omega grafted vines with complete alignment of the scion and the rootstock (CA) and vines with partial alignment (PA) was developed. Three complementary trials were carried out in the nursery, in the field and under controlled conditions. The CA vines increased the success rate in the nursery. Vine growth was significantly affected by the alignment between the rootstock and scion both in the nursery and in their first year of establishment in a commercial vineyard and in a potted trial, although these differences dissipated in years 2 and 3 under commercial vineyard conditions. The CA graft also maintained a higher level of leaf gas exchange, but such differences did not correspond to those in the hydraulic conductivity across the graft union itself. Conclusions: the degree of alignment of the grafted vine material affected vine development, but a better understanding of the role of vascular connections in different graft types and qualities is needed. Significance of the Study: to the best of our knowledge, this is the first scientific study that developed an experimental procedure for assessing the implication of the alignment at the grafting point on grapevine physiology and water use.