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Registros recuperados: 10
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Bilans spatialisés de carbone, d'azote et de phosphore d'un terroir de savane ouest-africaine : 1. Stocks d'éléments et structure d'un système agropastoral IRD
Manlay, Raphaël; Ickowicz, A.; Masse, Dominique; Floret, Christian; Richard, D.; Feller, Christian.
Tipo: Text Palavras-chave: DEGRADATION DU SOL; BILAN ORGANIQUE; STOCK; CARBONE; AZOTE; PHOSPHORE; BIOMASSE; VARIATION SPATIALE; EVOLUTION DES SOLS SOUS CULTURE; AGROPASTORALISME; SYSTEME DE CULTURE; VILLAGE; SAVANE.
Ano: 2004 URL: http://www.documentation.ird.fr/hor/fdi:010034983
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Development of an herbaceous cover in a sudano-sahelian savanna in North Cameroon in relation to available soil water IRD
Seghieri, Josiane; Floret, Christian; Pontanier, Roger.
Tipo: Text Palavras-chave: SAVANE; PHYTOECOLOGIE; DYNAMIQUE DE VEGETATION; PLUVIOMETRIE; RELATION SOL PLANTE; STRATE HERBACEE.
Ano: 1994 URL: http://www.documentation.ird.fr/hor/fdi:010006785
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La jachère en Afrique tropicale IRD
Floret, Christian; Pontanier, Roger; Serpantié, Georges.
Tipo: Text Palavras-chave: JACHERE; RECHERCHE SCIENTIFIQUE; ECOLOGIE; FERTILITE DU SOL; FACTEUR ANTHROPIQUE; AGRICULTURE; SYSTEME AGRAIRE; SYSTEME DE CULTURE; SYSTEME DE PRODUCTION; PROGRAMME DE RECHERCHE.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:39820
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La succession post-culturale en zone soudanienne IRD
Floret, Christian; Donfack, P..
Tipo: Text Palavras-chave: ROTATION DES CULTURES; JACHERE; DYNAMIQUE DE VEGETATION; STRUCTURE DU PEUPLEMENT; STRATE HERBACEE; STRATE LIGNEUSE.
Ano: 1998 URL: http://www.documentation.ird.fr/hor/fdi:010016817
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Le projet "La jachère en Afrique tropicale" IRD
Floret, Christian; Hien, V.; Pontanier, Roger.
Tipo: Text Palavras-chave: JACHERE; CYCLE CULTURAL; PROGRAMME DE RECHERCHE; FERTILITE DU SOL; DYNAMIQUE DE VEGETATION; ELEVAGE; SYSTEME AGRAIRE; TRANSFERT DE TECHNOLOGIE; VULGARISATION AGRICOLE; AGRICULTURE DURABLE.
Ano: 2007 URL: http://www.documentation.ird.fr/hor/fdi:010039331
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Les recherches en écologie végétale à l'ORSTOM au Sénégal : historique et état actuel IRD
Grouzis, Michel; Floret, Christian; Massé, Dominique; Rocheteau, Alain.
Tipo: Text Palavras-chave: PHYTOECOLOGIE; JACHERE; ECOLOGIE; VEGETATION; RECHERCHE SCIENTIFIQUE; HISTOIRE.
Ano: 1994 URL: http://www.documentation.ird.fr/hor/fdi:010018058
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Plant phenology in relation to water availability : herbaceous and woody species in the savannas of northern Cameroon IRD
Seghieri, Josiane; Floret, Christian; Pontanier, Roger.
Phenological patterns of herbaceous and woody plants well represented in the Sudano-Sahelian savannas of northern Cameroon were studied in relation to water availability in three contrasted soil types. Mean annual precipitation in this region is 800 mm, entirely restricted to the period May-June to September-October, but redistribution of rainwater by varying soil substrates leads to considerable heterogeneity in available water resources fo plants. Results are discussed in terms of probable competition for water resources among co-occurring plants and the adaptations shown by observed patterns to prevailing environmental conditions. Water stress is seen to be a limiting factor to plant growth but does not constitute the sole trigger for the phenological...
Tipo: Text Palavras-chave: SAVANE; STRATE HERBACEE; STRATE LIGNEUSE; RESSOURCES EN EAU; PHENOLOGIE.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:010013505
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Secondary succession in abandoned fields of dry tropical Northern Cameroon IRD
Donfack, P.; Floret, Christian; Pontanier, Roger.
This study evaluates the processes of recolonization of abandoned fields by native vegetation under conditions of intensive human activity (fire, intensive grazing, firewood cutting) in a semi-arid tropical region savanna of northern Cameroon. Secondary plant succession was studied in two series of formerly cultivated fields 1-35 yr after the beginning of the fallow period. Floristic changes and the dynamics of woody plant populations were compared between areas with vertisols (clay texture) and sandy soils, as a function of length of fallows. Vegetation changed continuously during the 35 years following field abandonment. However, a very abrupt break occurred between 6 and 10 yr, due to increasingly intense human pressure during this period. Up to that...
Tipo: Text Palavras-chave: DYNAMIQUE DE VEGETATION; SAVANE; RECONSTITUTION DE LA BIOMASSE; STRATE LIGNEUSE; FLORISTIQUE; PHYTOECOLOGIE.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:010012480
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Un mode de gestion des ressources en Afrique tropicale : la jachère longue : regards différenciés sur une pratique en crise = Shifting cultivation, a way of managing natural resources in tropical Africa : multidisciplinary view on a threatened practice IRD
Serpantié, Georges; Floret, Christian.
Tipo: Text Palavras-chave: CULTURE ITINERANTE; PRATIQUE CULTURALE; JACHERE; FERTILITE DU SOL; SOCIETE RURALE; TERROIR.
Ano: 1994 URL: http://www.documentation.ird.fr/hor/fdi:43570
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Végétation des jachères et succession post-culturale en Afrique tropicale IRD
Fournier, Anne; Floret, Christian; Gnahoua, G.M..
Tipo: Text Palavras-chave: JACHERE; DYNAMIQUE DE VEGETATION; PAYSAGES VEGETAUX; STRUCTURE DU PEUPLEMENT; REGENERATION; ECOSYSTEME; SAVANE; FORET; PHYTOECOLOGIE; ESPECE INDICATRICE; VARIATION SPATIALE; FACTEUR ANTHROPIQUE; PRATIQUE CULTURALE; DEFRICHEMENT; FEU DE BROUSSE; PATURAGE; FACTEUR EDAPHIQUE; DIVERSITE GENETIQUE; RELATION INTERSPECIFIQUE; GRADIENT GEOGRAPHIQUE; VEGETATION POST CULTURALE.
Ano: 2001 URL: http://www.documentation.ird.fr/hor/fdi:010024635
Registros recuperados: 10
Primeira ... 1 ... Última
 

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