Comunicaciones a congresos, Conferencias, … (Fac. de Ciencias)
Permanent URI for this collectionhttps://hdl.handle.net/10171/70279
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- Estudio de la flora vascular y la micobiota micorrícica en quemados truferos de Navarra (España)(Comunità Montana dei Monti Martani Serano e Subasio, 2010) Cavero-Remon, R.Y. (Rita Yolanda); Gonzalez-Armada, M. (MB); Miguel-Velasco, A.M. (Ana Maria) deIn spite of the continuous advances in trufficulture there are still many questions about truffle growing, hence the big importance of studying the characteristics of the environment in which it best develops. In this study we have analysed the main ecological characteristics of the vascular flora growing in 24 holm oak brûles. This flora is special, very influenced by the alelopatic substances produced by the mycelium of the fungus, modifying the composition and the characteristics of the flora. As a result, plants grow smaller and with a lower covering. Sometimes they even present changes in their life-cycle. Therophytes typical of disturbed areas are dominant in plantations. Xerophile plants are also common. Besides, the species found in truffiers are proper of shaken, removed and generally sunny, dry and stony places, and many of them weeds. This corroborates the fact that the brûle is a very disturbed environment, both by fungus mycelium as by human intervention. On the other hand, monitoring the mycorrhizae is very important in truffle growing since it allows us to know if the plantations are properly developing or if truffle mycorrhizae have been replaced by other competing fungi. That is why we have carried out a below-ground study of the mycorrhizae appearing in the roots of the same holm-oaks, to check the presence of truffle mycorrhizae and to know if other mycorrhizal fungi are colonizing the roots.
- Actividad trufícola navarra. Cuestiones sin respuesta(Comunità Montana dei Monti Martani Serano e Subasio, 2010) Saez, R. (Raimundo); Miguel-Velasco, A.M. (Ana Maria) deIn Navarra, first plantations were carried out in 1989. The ignorance about truffle and trufficulture was total. Almost everything about truffle was unknown, almost even its existence, but as a consequence of the permanent search for new crops that contribute to diversify and improve agricultural productions of the region, it was decided with great interest to carry out the first plantations, and find information, mainly in France and Italy. Twenty years have passed. Technical and scientific advances have taken place but there are still many doubts. The expectations raised at first have not been reached in many cases. In spite of that, trufficulture is a reality, that covers important areas in those zones suitable for truffle growing, both in Navarra and in Spain, and it is still increasing. In Navarra, with the experience acquired, a few points can be made: • Mycorrhized plant production has evolve positively in Spain, which guarantees one of the most important factors in the reasonable trufficulture, together with land selection, climate or cultivation techniques. • The soil: lands selected for new plantations suit truffle needs. They are bigger plots, which is favourable to the correct management of plantation. • Irrigation: in new trufficulture the irrigation studies and practice have become very necessary. The experimentation in this subject is necessary to cover crop needs. • Spreading and training: promoting trufficulture as a diversification alternative in rural areas has been the aim reached through courses, trips, conferences, festivals, commercial exhibitions, competitions…, which has culminated with the creation of the first Truffle Museum in Spain.
- Some illustrative examples of permutability of fuzzy operators and fuzzy relations(Universidad de Zaragoza, 2014) Carmona-Cervelló, N. (Neus); Recasens-Ferres, J. (Jorge); Elorza-Barbajero, J. (Jorge); Bragard, J. (Jean)Composition of fuzzy operators often appears and it is natural to ask when the order of composition does not change the result. In previous papers, we characterized permutability in the case of fuzzy consequence operators and fuzzy interior operators. We also showed the connection between the permutability of the fuzzy relations and the permutability of their induced fuzzy operators. In this work we present some examples of permutability and non permutability of fuzzy operators and fuzzy relations in order to illustrate these results.
- Hidrosiembras en taludes de carreteras: éxito de la restauración a lo largo del tiempo(Asociación Técnica de Carreteras, 1996) Rodes-Navarro, D. (Daniel); Ibañez-Gaston, R. (Ricardo); Ederra, A. (Alicia); López, F. (F.)
- Effect of frosts on the mortality of common and cornwall forms of Oxalis latifolia Kunth(Association Française de Protection des Plantes, 2004) Royo-Esnal, A. (Aritz); Lopez, M.L. (María Luisa)Oxalis latifolia Kunth is not reported as a weed in those regions where the first centimetres of the soil get frozen in winter. The objective of this study is to evaluate the incidence of freezing temperatures on the mortality of common and cornwall form bulbs of O.latifolia in field conditions. 30 bulbs, 15 of each form, were planted 1 cm depth in two pots in April 2001 and they were placed outdoors in Azkoitia (northern Spain). Bulbs grew normally throughout the growing season and were harvested in January 2002. The lowest temperature reported in this period was -10ºC in December 2001. At the harvest all the found apical bulbs, whether they were common or cornwall, were dead. Among the lateral bulbs, 82% and 94% of common and cornwall form died because of frosts. The difference of mortality between the forms is explained by their morphology: common form bulbils grow over stolons some of which can bury the bulbils deeper in the soil and protect them from frosts; meanwhile, cornwall form bulbils are sessile and they have no choice of being buried and protected.
- Análisis polínico de mieles de los valles pirenaicos navarros (España)(Institut d´Estudis Ilerdencs, 1992) Perez-de-Zabalza, A. (Anabel)En este trabajo hemos realizado el análisis polínico cuantitativo y cualitativo de siete muestras de miel procedentes de siete localidades de los valles pirenaicos de Navarra. Hemos tipificado las siguientes mieles: castaño (Castanea sativa), brezo (Erica vagans), miel de tomillo (Thymus sp.) y milflores. Otros pólenes de acompañamiento en estas mieles son Trifolium repens, Lotus sp., Crataegus monogyna Papaver rhoeas, Thymus sp., t. Genista sp., Rubus. sp. Abstract: We have determined the pollen contents of seven honey samples from seven localities of the Pyrenean Valleys of Navarra, Spain, both quantitatively and qualitatively. The following honey types were found: Spanish chestnuy honey (Castanea sativa); heather honey (Erica vagans); thyme honey (Thymus sp.) and multifloral honeys. Other accompanying pollen are Trifolium repens; Lotus sp.; Crataegus monogyna Jacq.; Papaver rhoeas; Thymus sp. and t. Genista sp., Rubus sp.
- Distribución de Crocus nevadensis Amo & Campo, Rest. Farm. 1861 en Navarra(Institut d´Estudis Ilerdencs, 1992) Cavero-Remon, R.Y. (Rita Yolanda); Garde-Navarro, M.L. (M. L.); Lopez, M.L. (María Luisa)Distribución y ecología de Crocus nevadensis Amo & Campo in Navarra. Se ha estudiado la distribución y el hábitat de Crocus nevadensis en la provincia de Navarra. Abstract: Distribution and ecology of Crocus nevadensis Amo & Campo in Navarra. We give the distribution and habitat of Crocus nevadensis in the Navarra country.
- Estudio de la afinidad entre hayedos y robledales de Navarra (España) mediante la aplicación del índice de Jaccard a su brioflora(Institut d'Estudis Ilerdencs, 1992) Ederra, A. (Alicia); Miguel-Velasco, A.M. (Ana Maria) deSe ha estudiado la afinidad entre hayedos y robledales mediante la aplicación del índice de Jaccard a su brioflora. Los hayedos se separan en tres grupos según su pertenencia a distintas comunidades, mientras que en los robledales el factor más importante para su agrupación parece ser la vertiente hidrográfica a que pertenecen. Considerados ambos tipos de bosque en conjunto, resalta el hecho de que ningún hayedo se parece más a un robledal que a otro hayedo y viceversa. Summary: The affinity between beech woods and oak by application of the index of Jaccard has been studied. Beech woods from three groups related with the community to which they belong, whereas on oak woods the most important fact seems to be their situation in atlantic or mediterranean slope. Considering both kinds of woods together the fact of that none of the beech woods is more resembling to any oak woods than to other beech wood and viceversa is evident.
- Effect of bulb depth on the development of Oxalis latifolia Kunth(International Weed Science Society, 2000) Royo-Esnal, A. (Aritz); Lopez, M.L. (María Luisa)
- Brioflora de los rasos supraforestales de tres macizos atlánticos silíceos de Navarra (España)(Universidad de Granada, 1987) Arraiza, J. (Javier); Ederra, A. (Alicia); Miguel-Velasco, A.M. (Ana Maria) deSe ha estudiado la brioflora de los rasos supraforestales de Peñas de Aya, Mendaur y Saioa-Zuriain. Se han determinado 156 taxones, de los que 18 son novedades para la flora navarra. Se discute la influencia atlántica, pirenaica y mediterranea en los tres macizos, en base a su proximidad-lejanía al mar Cantábrico y a los Pirineos y a su altitud. Summary: Bryoflora of the supraforestal level of Peñas de Aya, Mendaur and Saioa-Zuriain is studied. 156 taxa, 18 of which are new records for Navarra have been determinated. The atlantic, pyrenean and mediterranean influence on the three mountains, based on their proximity-farness to the Cantabric Sea and Pyrinees and their altitude is discussed.