16 research outputs found

    Mapa de Vegetaci贸 de Catalunya 1:50.000 (MVC50). Mem貌ria del full de Vic (332)

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    Aquesta mem貌ria va associada al mapa de vegetaci贸 que compr猫n el territori administrat per la Generalitat de Catalunya incl貌s en el full 332 (Vic). Inclou una descripci贸 detallada del medi f铆sic, i de les unitats de vegetaci贸 actual i potencial. Enlla莽 al mapa: http://hdl.handle.net/2445/6484

    Estudi de la poblaci贸 de Spiraea crenata subsp. parvifolia (Rosaceae) del Collsacabra

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    Spiraea crenata subsp. parvifolia 茅s un t脿xon end猫mic del nord-est ib猫ric, que t茅 una de les escasses poblacions conegudes al Collsacabra, Osona. En aquest treball es pret茅n definir l鈥檈xtensi贸 d鈥檃questa poblaci贸, caracteritzar la seva estructura demogr脿fica i avaluar-ne l鈥檈stat de conservaci贸. La majoria d鈥檌ndividus censats viuen en un nucli principal rodejat per nuclis m茅s petits. L鈥檈stabilitat de l鈥檃mbient que ocupa permet valorar l鈥檈voluci贸 de la poblaci贸 i la categoria UICN d鈥檃mena莽a, actualment considerada 芦en perill 禄. Es proposen mesures de gesti贸 que permetin la conservaci贸 d鈥檃questa poblaci贸

    Yield in double cropping system as affected by N fertilization rate with pig slurry in a Catalonia dryland region

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    Intensive swine production is an important agricultural and economical activity in Europe. The high availability of pig slurry (PS) lead to attractive fertilization strategy to reduce costs, therefore is mainly applied as fertilizer in agricultural systems. The optimization N fertilization in these areas should be taken in into to avoid nitrates losses by lixiviation and to achieve maximum efficiency in crop nutrition. Many studies have shown that PS applications can achieve satisfactory yields in different crops by partially or completely replacing synthetic fertilizers. In addition, for the last years, in Northeast Spain (Catalonia) has been widely extended the double-cropping forage system

    Correlation between species composition and soil properties in the pastures of Plana de Vic (Catalonia, Spain)

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    The correlation between the species composition of pasture communities and soil properties in Plana de Vic has been studied using two multivariate methods, Correspondence Analysis (CA) for the vegetation data and Principal Component Analysis (PCA) for the soil data. To analyse the pastures, we took 144 vegetation relev茅s (comprising 201 species) that have been classified into 10 phytocoenological communities elsewhere. Most of these communities are almost entirely built up by perennials, ranging from xerophilous, clearly Mediterranean, to mesophilous, related to medium-European pastures, but a few occurring in shallow soils are dominated by therophytes. As for the soil properties, we analysed texture, pH, depth, bulk density, organic matter, C/N ratio and the carbonates content of 25 samples, corresponding to representative relev茅s of the communities studied

    Mapa de Vegetaci贸 de Catalunya 1:50.000 (MVC50). Full 332 (Vic)

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    Aquest mapa de vegetaci贸 compr猫n el territori administrat per la Generalitat de Catalunya incl貌s en el full 332 (Vic). S'han seguit els mateixos criteris de representaci贸 que en els fulls apareguts fins ara de la s猫rie 1:50 000 del Mapa de Vegetaci贸 de Catalunya. La informaci贸 que hi donem permet una lectura a diferents nivells, segons els interessos de l'usuari. Aix铆, pel que fa a la interpretaci贸 del paisatge, hom hi aplica tres graus d鈥檃proximaci贸 distints: la fisiognomia de la vegetaci贸, les unitats de vegetaci贸 actual i els dominis potencials. La versi贸 del mapa en format shapefile est脿 georeferenciada segons el datum ETRS89

    Mapa de Vegetaci贸 de Catalunya 1:50.000 (MVC50). Full 294 (Manlleu)

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    Aquest mapa de vegetaci贸 compr猫n el territori administrat per la Generalitat de Catalunya incl貌s en el full 294 (Manlleu). S'han seguit els mateixos criteris de representaci贸 que en els fulls apareguts fins ara de la s猫rie 1:50 000 del Mapa de Vegetaci贸 de Catalunya. La informaci贸 que hi donem permet una lectura a diferents nivells, segons els interessos de l'usuari. Aix铆, pel que fa a la interpretaci贸 del paisatge, hom hi aplica tres graus d鈥檃proximaci贸 distints: la fisiognomia de la vegetaci贸, les unitats de vegetaci贸 actual i els dominis potencials. La versi贸 del mapa en format shapefile est脿 georeferenciada segons el datum ETRS89

    Soil water regime through contrasting pasture communities in a Submediterranean landscape

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    Submediterranean landscape around Vic includes, scattered over intensively farmed ground, a number of hills holding diverse mosaics of natural and seminatural communities. We chose two contrasting communities of pastures to investigate the soil water regime, assumed to be the cause of noticeable shifts in the landscape mosaics. Brachypodio-Aphyllanthetum is a Mediterranean, xerophilous, open pasture dominated by the chamaephytic grass Brachypodium retusum, whereas Plantagini-Aphyllanthetum is a dense grassland of Brachypodium phoenicoides, similar to Medioeuropean mesoxerophilous grasslands. We recorded the soil water content in three plots for each community in different hills, during two and a half years. From gravimetric water percentages and soil water retention curves in each plot, we evaluated the soil water potential and the available water during the study period at different depths. Both communities showed roughly similar seasonal soil water dynamics, which included three clearly differentiated hydric periods: (i) humid (October鈥揂pril), with soils not far from field capacity; (ii) dry (July鈥揂ugust), when soils were drier than wilting point; and (iii) transitional (May鈥揓une), defined by a dramatic water loss. The summer values of water content and hydric potential were similar in the two analysed communities, thus rejecting the hypothesised better summer conditions in the mesoxerophilous grassland. The only clear difference was in the way in which the spring transition occurred, namely it was faster and showed sharper ups and downs in the xerophilous Mediterranean pasture. The inverse seasonal transition, from dry to humid, was clearly a sudden event, strongly depending on the timing of late summer rainfall, and it seems not to be a key factor in shaping the functioning of the communities. The lower moisture values at deep soil layers during the humid periods suggest a deficient hydrological functioning, perhaps connected with the pasture-type vegetation

    Estudi de la flora i la fauna d'una zona agroforestal del sud d'Osona

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    L鈥檕bjectiu general de l鈥檈studi 茅s tenir un coneixement de les esp猫cies de flora i fauna presents en una 脿rea agroforestal situada al sud de la comarca d鈥橭sona. A nivell espec铆fic, s鈥檋a laborat un llistat de les esp猫cies de flora i fauna presents tan exhaustiu com ha estat possible, s鈥檋an caracteritzat les comunitats vegetals presents, s鈥檋a avaluat la poblaci贸 d鈥檃lgunes esp猫cies de vertebrats presents, s鈥檋an identificat els punts d鈥檌nter猫s per a la conservaci贸 de certes esp猫cies i, finalment, s鈥檋an establert prioritats de conservaci贸 dins l鈥櫭爎ea d鈥檈studi

    Mapa de Vegetaci贸 de Catalunya 1:50.000 (MVC50). Full 294 (Manlleu)

    No full text
    Aquest mapa de vegetaci贸 compr猫n el territori administrat per la Generalitat de Catalunya incl貌s en el full 294 (Manlleu). S'han seguit els mateixos criteris de representaci贸 que en els fulls apareguts fins ara de la s猫rie 1:50 000 del Mapa de Vegetaci贸 de Catalunya. La informaci贸 que hi donem permet una lectura a diferents nivells, segons els interessos de l'usuari. Aix铆, pel que fa a la interpretaci贸 del paisatge, hom hi aplica tres graus d鈥檃proximaci贸 distints: la fisiognomia de la vegetaci贸, les unitats de vegetaci贸 actual i els dominis potencials. La versi贸 del mapa en format shapefile est脿 georeferenciada segons el datum ETRS89

    Correlation between species composition and soil properties in the pastures of Plana de Vic (Catalonia, Spain)

    No full text
    The correlation between the species composition of pasture communities and soil properties in Plana de Vic has been studied using two multivariate methods, Correspondence Analysis (CA) for the vegetation data and Principal Component Analysis (PCA) for the soil data. To analyse the pastures, we took 144 vegetation relev茅s (comprising 201 species) that have been classified into 10 phytocoenological communities elsewhere. Most of these communities are almost entirely built up by perennials, ranging from xerophilous, clearly Mediterranean, to mesophilous, related to medium-European pastures, but a few occurring in shallow soils are dominated by therophytes. As for the soil properties, we analysed texture, pH, depth, bulk density, organic matter, C/N ratio and the carbonates content of 25 samples, corresponding to representative relev茅s of the communities studied
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