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handle: 10261/81294
[ES] La integral térmica o suma de grados-día es un parámetro climático muy relacionado con el desarrollo vegetativo de las plantas. En diversos estudios, se han puesto de manifiesto relaciones específicas con el contenido en nutrientes (proteína y minerales), digestibilidad, contenido en fenoles y desarrollo morfológico de la planta. En este trabajo se aborda el estudio de las relaciones entre integral térmica y fenofases en especies de puertos pirenaicos, para evaluar su interés como posibles indicadoras de la calidad de dichos pastos. Se han utilizado datos fenológicos obtenidos en dos parcelas de muestreo situadas en cercados de exclusión de herbívoros en el Parque Nacional de Ordesa y Monte Perdido a 1950m de altitud. Los datos climáticos proceden de una estación cercana situada a 6 km de las parcelas. Ambos tipos de datos se han estimado para cada año desde 1993 a 2012. Se han establecido modelos lineales predictivos para las fenofases de varias especies pascícolas y del total de la comunidad. Aunque los ajustes de los modelos son débiles, cabría la posibilidad de mejorarlos aumentando el número de parcelas y los contactos por especie. Se subraya el interés de estos modelos para la gestión y ordenación de los pastos de puerto.
[EN] Sum of degree-days (IT) is a climatic parameter closely related to the vegetative growth of plants. Particularly, specific relationships with digestibility, protein, mineral or phenol content, and morphological development have been shown. This paper addresses a preliminary study of the relationship between sum of degree-days and phenophases in Pyrenean pasture species, to gauge their interest as potential indicators of pasture quality. We used phenological data of species from two sampling plots located in herbivore exclusion fencing in Ordesa National Park at 1950m altitude. Climate data come from a nearby station located 6 km from the plots. Both types of data were estimated for each year since 1993 to 2012. Linear predictive models from snowmelt date and spring sum of degree-day were established for the phenophases of several species and for the total grassland community. Although the adjustments of the models are weak, it could be possible to improve them in the future by increasing sampling size of target species. We highlight the interest of these models for the use and management of Pyrenean summer pastures.
Esta investigación ha sido financiada por el Ministerio de Ciencia e Innovación del Gobierno de España (proyectos CGL2010-21963 y CGL2011-29746), y por el Programa Europeo POCTEFA (nº EFA34/08, FLUXPYR). Agradecemos a las autoridades locales su apoyo y su permiso para establecer las parcelas experimentales.
Peer reviewed
8 páginas
Ordesa, Suma grados-día, Phenophases, Snowmelt date, Ordesa National Park, fenofases, Sum degree-days
Ordesa, Suma grados-día, Phenophases, Snowmelt date, Ordesa National Park, fenofases, Sum degree-days
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