Comunicacions a congressos (Ciència i Enginyeria Forestal i Agrícola)
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- ItemOpen AccessAnalysis of drought impact on apple trees using the leafiness- LiDAR index(2025) Sandonís Pozo, Leire; Martínez Casasnovas, José Antonio; Pascual Roca, MiquelApple trees (Malus×domestica Borkh.) are widely cultivated in Mediterranean regions, where drought poses a major challenge to growth and productivity. This study assessed the Leafiness-LiDAR Index (LLI) as a proxy for the Leaf Area Index (LAI) and its relationship with yield parameters, including fruit count (num/tree), size, weight, and yield (kg/ha), under two irrigation regimes – full irrigation (FI) and deficit irrigation (DI) – and planting densities (0.5 m and 1 m). Results showed a positive correlation between LLI, LAI, and yield, with reduced vegetative growth under drought (DI) conditions. Wider planting frames favoured larger fruit size and higher fruit count, while denser frames increased yield per hectare. LLI proved effective for monitoring canopy dynamics, offering potential for improving productivity and drought resilience.
- ItemOpen AccessTowards Analysis of Drought Impact on Apple Trees Using the Leafiness-LiDAR Index(2025) Sandonís Pozo, Leire; Martínez Casasnovas, José Antonio; Pascual Roca, MiquelApple trees (Malus×domestica Borkh.) are widely cultivated in Mediterranean regions, where drought poses a major challenge to growth and productivity. This study assessed the Leafiness-LiDAR Index (LLI) as a proxy for the Leaf Area Index (LAI) and its relationship with yield parameters, including fruit count (num/tree), size, weight, and yield (kg/ha), under two irrigation regimes – full irrigation (FI) and deficit irrigation (DI) – and planting densities (0.5 m and 1 m). Results showed a positive correlation between LLI, LAI, and yield, with reduced vegetative growth under drought (DI) conditions. Wider planting frames favoured larger fruit size and higher fruit count, while denser frames increased yield per hectare. LLI proved effective for monitoring canopy dynamics, offering potential for improving productivity and drought resilience.
- ItemOpen AccessEWRS 2025. 20th European Weed Research Society Symposium. 1-4 July 2025 Lleida (Catalonia, Spain). Joint approaches for sustainable weed management(European Weed Research Society, 2025) European Weed Research SocietyNew advances in weed science are oriented towards achieving a balance between crop production and sustainability. In this sense, weed science research at the European level is informed by the EU’s Common Agricultural Policy and is increasingly focused on the integration of new tools, methods and strategies for an improved weed management. This situation could be defined by the congress motto: Joint approaches for sustainable weed management. Advances in weed science in Europe will be presented on the upcoming EWRS Symposium that will take place in Lleida (Catalonia, Spain) in 2025. This symposium has never been held in Spain, a country with an important and diversified agricultural activity and with an active weed science society. For this reason, the Local Committee formed by weed scientists from the University of Lleida, Agrotecnio Centre and with the support of colleagues from Department of Agriculture, the Polytechnic University of Catalonia and CITA Aragón, are enthusiastic to celebrate this relevant event and invite all weed scientists from Europe and other countries to join us in Lleida in July 2025 and share an unforgettable week of science and friendship.
- ItemOpen AccessPLASTIX : Plasticité des composantes de rendement des céréales à paille(Rencontre Scientifique du FSOV, 2024-11-22) Allard, V.; Girousse, C.; Le Gouis, Jacques; Deswarte, Jean-Charles; Thepot, Stéphanie; Auzanneau, Jérôme; Caiveau, Sébastien; Giraudeau, Pascal; Slafer, Gustavo A.; Vile, Denis; de Solan, BenoîtLa plastícíté des composantes s'intéresse a la variation d'une composante par rapport ¡ á une autre. 11 est supposé que la plastlclté du tallage et de la fertlllté épl constltuent, un levíer variétal d'adaptatlon aux stress climatiques ou nutritlonnels. La valorisation des largas jeux de données existants sur blé tendre (essais BreedWheat. i réseau post-lnscription) permet d'explorer les variatlons des composantes dans des ! contextes pédo-ciimatiques variés, sans induire de manipulation des couverts. Des i différences variétales fortes ont élé observées. Des essais dédiés, inciuant une manipulation de la denstté des épis, a pu démontrer la¡ ¡ vañabililé génétique de la plasticrté de la ferülilé épi. L'accés aux ressources lumineuses 1 semble atre le déclencheur de la compensatlon via le nombre de gralns par épí. La plasticité de la fertilité des épis résulte d'une modification du nombre de grains/épi, et non du nombre d'épillet. Elle n'est done décelab e qu'á travers le comptage effectif des gralns ou: le calcul de la composante « grains/épi ». lCe calcul requiert un accés aisé a la densité de semis. désormais accesslble avec des oulils de phénotypage a haut débil. La configuratlon des parcelles peut avoir un lmpact fort sur l'expression de la plasticlté des épis, et sur les valeurs de composanles de rendemenl estimées par calcul.
- ItemOpen AccessEfecto del sistema de laboreo y el tipo de fertilización sobre la sobre la volatilitzación de NH3 en secanos demiáridos del Valle del Ebro(CSIC; Universitat de Lleida; CITA; IAMZ, 2013) Ovejero, J.; Lampurlanés Castel, Jorge; Cantero-Martínez, Carlos; Plaza Bonilla, Daniel; Álvaro Fuentes, J.