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Options Méditerranéennes : Série A. Séminaires Méditerranéens
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ISSN :
0253-1542
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Documents disponibles dans la collection (198)
Communication à un Congrès (avec Actes)
M.M. Yanguas ; M.R. Pascual ; A. Gómez Sal | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The maintenance of mountain pastures (called puertos in Spanish) is doubly important because of their being a productive resource and their role in nature conservation. Their present use by transhumant livestock, the number of which has decrease[...]Communication à un Congrès (avec Actes)
M.C. Péres Hernández ; F.J. Gutiérrez Mañero ; J.M. Pozuelo González ; F. Bermúdez de Castro | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989An annual acetylene-reducing activity (ARA) pattern in a riparian forest is determined. Free microorganisms, legumes and Alnus glutinosa shrubs and trees were measured in spring, summer, autumn and winter. The studied nitrogen-fixing systems pre[...]Communication à un Congrès (avec Actes)
M. Marquez ; E. Nuñez ; J.C. Escudero | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989This study is an analysis of Nitrogen dynamics in populations of Cistus ladanifer L., of different ages, between 4 and over 40 years. For this purposes the Nitrogen contents of different fractions of aerial biomass were studied from each populat[...]Communication à un Congrès (avec Actes)
M.V. Garrido ; J.M. Del Arco ; A. Escudero | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The process of litter decomposition ten shows initial stages with an intense mineralization, because of leaching and decomposition of labile constituents. These dynamics imply strong pulses of nutrient inputs to soil, which can increase leaching[...]Communication à un Congrès (avec Actes)
M. Kamoun | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989After having for centuries been a prime source of milk and meat for populations in arid zones, the dromedary has become the poor relative of development plans. Knowledge acquired regarding growth and meat production indicates that the dromedary [...]Communication à un Congrès (avec Actes)
L. Blajan ; K. Lasnami | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Few systematic studies have been performed to date on the pathology of dromedaries, but over 800 observations have been carried out on slaughterhouse and on army animals. They concern parasitism (52 per cent), infections (42 per cent), affection[...]Communication à un Congrès (avec Actes)
H. Narjisse | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Despite its great importance to increase the value of semidesertic regions, the dromedary is still a neglected species. This animal is particularly adapted to feed to cover much lower nutritional needs than other species thanks to a very efficie[...]Communication à un Congrès (avec Actes)
A. Lahlou Kassi ; A. Anouassi ; M. Sghiri | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989For want of specific studies in dromedaries the effects of feeding on reproduction are inferred by analogy with what is known from ruminants. The underfeeding, mainly in energy, delays puberty and decreases females' fertility and fecundity in th[...]Communication à un Congrès (avec Actes)
A. Moyano ; J.F. Gallardo ; A. Prieto | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The carbon and nitrogen contents of the ploughed layers from Salamanca province cultivated soils have been determined. From these data is established that there are no change in organic matter contents throughout thirty years (1954-1983). The ac[...]Communication à un Congrès (avec Actes)
Y. Chilliard | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The lipidic metabolism of the dromedary presents many characteristics: anatomical localisation of the reserves, the shapes of transport of the blood lipids, metabolism of glucose, the butyrate and the cetonic bodies, synthesis of the lipids of m[...]Communication à un Congrès (avec Actes)
T. Tarazona ; S. Moreiro ; P. Zaldivar ; R. Calvo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989A phenological study in beech forests was made in the Demanda mountains (Sistema ibérico, Spain). It carries out the knowledge of the relationship between climatic variations in this region with altitude and other ecological factors. These relat[...]Communication à un Congrès (avec Actes)
R. Tárrega ; E. Luis | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Five years of post-fire regeneration in Quercus pyrenalca ecosystems of Leon province were studied. One month after the fire most of the present species have probably sprout by vegetative means. The highest values of diversity and fugacity index[...]Communication à un Congrès (avec Actes)
D. Badia ; J.M. Alcañiz | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Seasonal samples from six experimental plots of saline, gypseous and carbonated soils from arid lands of Ebro Valley, under irrigated and non-irrigated conditions, were incubated 14 days to determinate the potential nitrate production. Analytica[...]Communication à un Congrès (avec Actes)
M.M. Serrano ; J. Bellot ; M.T. Aguinaco | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989This study shows a description of the present state of spontaneous shrubs developed on a non-cultivated surface in an irrigation area. The studied area is located on a gypsum soil subjected to intense agricultural and cattle use. Shrub formation[...]Communication à un Congrès (avec Actes)
A. Müller ; M.F. Schmitz ; F. Bermúdez de Castro | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The nitrogen fixation (ARA) of specimens of Lobaria pulmonaria growing on Quercus pyrenaica trunks in a mixed wood of beech and oak trees in Montejo de la Sierra (Madrid) is determined. The ARA was analysed monthly for a whole year and incubatio[...]Communication à un Congrès (avec Actes)
B. Faye ; J.-L. Tisserand | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The dromedary is well adapted to the utilisation of ligneous vegetation of low nutritional value found in its natural habitat zone, thanks to its aptitude to vary its food, and to search for foods that are rich in water content and that can make[...]Communication à un Congrès (avec Actes)
F.H. Longuo ; A. Chelma ; A. Ouled Belkher | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989An investigation was conducted in the areas of Ouargla, Ghardaïa and El-Goléa in view of on the one hand, inventorying plants picked by the dromedary, and on the other hand, studying their chemical composition and their digestibility. 6 plants w[...]Communication à un Congrès (avec Actes)
I. Serrasolsas ; A. Ferran ; V.R. Vallejo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Litter evolution is studied in plots of increasing age after fire: from 2 months to 30 years. During the first year, the L horizon decomposed quickly. The process was described by the decreasing of the L/F ratio during this period. From second y[...]Communication à un Congrès (avec Actes)
J. Montalvo ; L. Ramírez-Sanz ; M.A. Casado ; C. Levassor ; B. Peco ; F. Diaz Pineda | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Experimental disturbances of pasture ecosystems along an altitudinal gradient have shown different recovery strategies. The process of restoration seems to be related with the type of disturbance performed and the previous taxocenosis compositionCommunication à un Congrès (avec Actes)
Communication à un Congrès (avec Actes)
L. Calvo ; E. Luis ; R. Tárrega | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989First phases of regeneration in three types of heath communities after fire, cutting and uprooting in experimental plots have been studied, devoting a particular attention to the herbaceous species. Greater rate of perennial than annual species [...]Communication à un Congrès (avec Actes)
P. Garcia-Fayos ; J.L. Hernández ; J.L. Rubio | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Relationship between soil erodibility values and several extrinsic factors type of soil, litology, vegetation cover, use and soil perturbation by forest fires were analysed through chi-squared tests of Independence and correspondence analysis. T[...]Communication à un Congrès (avec Actes)
E. Nuñez ; J. Cabeza ; J.C. Escudero | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Energetic yield obtained from jara (Cistus ladanifer L.) was studied through transformation of biomass into char. Pyrolysis, distillation of organic materials by heating without oxygen addition, was utilised. Three different ages of jara were te[...]Communication à un Congrès (avec Actes)
J.F. Gallardo ; I. Santa Regina ; C. San Miguel | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The biomass and litter mineral content of three forest ecosystems of the Sierra de Bojar are been determined. No significant differences have been found in the total chemical composition of the different litter constituents of the three forest e[...]Communication à un Congrès (avec Actes)
J. Cañas ; T. Franquesa | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989We have made selective cuts of bush in mixed Mediterranean forest of Pinus halepensis, Quercus ilex, and Quercus cerrioides in order to get rid of important amounts of dried up Erica arborea a cut down the risk of fire. Our main purpose was to c[...]Actes de Congrès ou Communication isolée
J.-L. Tisserand, ed. | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Ce séminaire sur la digestion, la nutrition et l'alimentation du dromadaire se compose de 6 parties. 1 : Présentation de l'élevage du dromadaire. 2 : Les ressources alimentaires. 3 : Physiologie digestive. 4 : Métabolisme. 5 : Relation de la fon[...]Communication à un Congrès (avec Actes)
J.C. González-Hidalgo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The study of climatic variables in the area of La Violada shows the periodical succession of rainfall rhythms in which the participation of the most contributing seasons is subject to opposing variationsCommunication à un Congrès (avec Actes)
E. Luis ; E. Garzón ; R. Tárrega ; L. Calvo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Soil physical and chemical characteristics of 38 shrub communities, located in Leon province, have been studied and compared with the dominant ligneous species. All the samples have been compared using a factorial analysis of principal component[...]Communication à un Congrès (avec Actes)
J.L. Rubio | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989In Mediterranean conditions hydric soil erosion is the most dangerous threat of soil degradation. The erosion processes have widespread consequences in the ecological values of the land and also strong implications in the agricultural and forest[...]Communication à un Congrès (avec Actes)
D. Bonilla ; F. Roda | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989In March 1986, four 2x2 m treeless plots were trenched all around in an evergreen oak stand in the Montseny mountains (NE Spain). Responses to perturbation were monitorised through: 1) net mineralisation and nitrification rates measured monthly [...]