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Détail de l'auteur
Auteur K Assigbetsé
Documents disponibles écrits par cet auteur
Affiner la rechercheL’agriculture africaine face aux changements globaux : recherches et innovations base´ es sur les sciences de l’e´ cologie / Dominique Masse
L’agriculture africaine face aux changements globaux : recherches et innovations base´ es sur les sciences de l’e´ cologie = African agriculture faced with global changes: Researches and innovations based on ecological sciences [texte imprimé] / Dominique Masse, Auteur ; Ndèye Yacine Badiane Ndour, Auteur ; E Hien, Auteur ; E. L. Akpo, Auteur ; K Assigbetsé, Auteur ; A Bilgo, Auteur ; I. Diedhiou, Auteur ; V. Hien, Auteur ; L. Lardy, Auteur . - Dakar (Sénégal) : ISRA/LNRPV, 2012 . - 54p.
Langues : Français (fre)
Catégories : AGRICULTURE EN GENERAL Mots-clés : Agro-écologie, Agro foresterie, Compost, Sol, Afrique de L'ouest, Agriculture, Changement Climatique Index. décimale : A540-Compte rendus de réunion. Rapports de mission Résumé : Dans le contexte de changements environnementaux et socio-e´conomiques, l’agriculture
en Afrique sub-saharienne devra assurer la se´ curite´ alimentaire des populations, tout en
limitant son empreinte e´ cologique. Les contraintes biophysiques et sociales des syste`mes
de production agricole sont complexes. Les pratiques agricoles innovantes seront base´es
sur une intensification des processus e´ cologiques qui de´terminent le fonctionnement du
syste`me sol–plante, des parcelles cultive´ es ou des agroe´ cosyste`mes. Au travers d’exemples
de recherches mene´es par le laboratoire mixte international intensification des sols
cultive´ s en Afrique de l’Ouest « IESOL » (ISRA, Ucad, UT, UO, Inera, IRD) sera de´montre´
l’inte´ reˆt de cette de´marche d’inge´ nierie e´ cologique pour que l’agriculture sub-saharienne
puisse relever le de´fi qui lui est lance´ .Exemplaires
Code-barres Cote Support Localisation Section Disponibilité PV1700028 A540- MAS Rapport LNRPV Rayons Exclu du prêt Documents numériques
Cliquer pour voir pdfURL Journal of Arid Environments. Soil microbial functional capacity and diversity in a millet-shrub intercropping system of semi-arid Senegal / S Diakhaté
Journal of Arid Environments. Soil microbial functional capacity and diversity in a millet-shrub intercropping system of semi-arid Senegal [texte imprimé] / S Diakhaté, Auteur ; M. Gueye, Auteur ; T chevallier, Auteur ; .N H. Diallo, Auteur ; K Assigbetsé, Auteur ; J Abadie, Auteur ; M. Diouf, Auteur ; Dominique Masse, Auteur ; Mbacké Sembène, Auteur ; Ndèye Yacine Badiane Ndour, Auteur ; R.P. Dick, Auteur ; L. C. Lardy, Auteur . - Dakar (Sénégal) : ISRA/LNRPV, 2016 . - 09p.
Langues : Anglais (eng)
Catégories : SCIENCES ET PRODUCTIONS VEGETALES Mots-clés : Afrique subsaharien, Sol, Pennisetum Glaucum, Espèce ligneuse Index. décimale : F083-Dry farming,culture en zone aride Exemplaires
Code-barres Cote Support Localisation Section Disponibilité PV1700039 F083- DIA Article scientifique LNRPV Rayons Exclu du prêt Documents numériques
Cliquer pour voir pdfURL Journal of Arid Environments, vol.129. Soil microbial fonctional capacity and diversity in a millet-shrub intercropping system of semi-arid Senegal. / S Diakhaté
Journal of Arid Environments, vol.129. Soil microbial fonctional capacity and diversity in a millet-shrub intercropping system of semi-arid Senegal. [texte imprimé] / S Diakhaté, Auteur ; M. Gueye, Auteur ; T. Chevallier, Auteur ; N. H. Diallo, Auteur ; K Assigbetsé, Auteur ; J Abadie, Auteur ; M. Diouf, Auteur ; Dominique Masse, Auteur ; Mbacké Sembène, Auteur ; Ndèye Yacine Badiane Ndour, Auteur ; R.P. Dick, Auteur ; L Chapuis-Lardy, Auteur . - [s.d.] . - pp.71-29.
Langues : Anglais (eng)
Catégories : RESSOURCES NATURELLES ET ENVIRONNEMENT Mots-clés : Activités enzymatiques du sol, fertilité du sol Index. décimale : P345-Biochimie du sol: litière du sol, décomposition ; humus Résumé : A few species of shrubs grow with dryland row crops in farmers’ fields throughout the Sahel and can significantly increase crop yield. The presence of shrub roots and litter inputs should have implications for soil nutrient pool sizes but there is limited information on the interactions of these shrubs with microbial communities involved in biogeochemical processes. Therefore, the objective of this study was to determine the microbial composition and functional capacity of soil from the rooting zone of pearl millet (Pennisetum glaucum) grown in the presence or absence of the shrub Piliostigma reticulatum in Senegal. Soil samples were collected from a long-term field study where millet was cultivated alone or intercropped with P. reticulatum with annual incorporation of coppiced shrub residues. Higher nutrient contents and distinct differences in microbial communities (DGGE profiles) were found between soils from beneath the canopy compared to soil outside the influence of shrubs. The catabolic response profile (MicroResp™) showed that the soil microbial community at both shrub and non-shrub sampling locations, metabolized a wide range of substrates. Trehalose that can work as a signaling molecule was more rapidly degraded in the rooting zone of millet growing in the presence of P. reticulatum over millet alone. Urease, arylsulfatase and dehydrogenase activities in the millet root zone soil were higher when intercropped with P. reticulatum which indicates enhanced potential of biogeochemical processes to proceed in the presence of this shrub. It is concluded that the native shrub P. reticulatum promotes a more diverse and active microbial community in the rooting zone of millet and further indicates greater potential to
perform decomposition and mineralize nutrients.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité CT1900007 P345-DIA Article scientifique CRA/Tamba Dépot numérique Exclu du prêt Documents numériques
Cliquer pour pdfURL Open journal of soil science, vol.6. Response of Soil Microbial Properties to Long-Term Application of Organic and Inorganic Amendments in a Tropical Soil (Saria, Burkina Faso). / N. H. Diallo
Open journal of soil science, vol.6. Response of Soil Microbial Properties to Long-Term Application of Organic and Inorganic Amendments in a Tropical Soil (Saria, Burkina Faso). [texte imprimé] / N. H. Diallo, Auteur ; K Assigbetsé, Auteur ; S. N. Sall, Auteur ; Dominique Masse, Auteur ; Bousso Bonzi, Auteur ; I. Ndoye, Auteur . - Delaware (USA) : Scientific Research Publishing Inc, 2016 . - pp. 21-33 ; ill.
Langues : Anglais (eng)
Catégories : RESSOURCES NATURELLES ET ENVIRONNEMENT Mots-clés : Amendements organiques, Engrais minéraux, Biomasse microbienne, Activités des enzymes du sol, PCR-DGGE, Stades de développement des cultures, Lixisol Index. décimale : P354-Fertilisation du sol ; conditionneur du sol Résumé : Soil microbial biomass carbon (MBC), β-glucosidase, acid phosphatase and fluorescein diacetate (FDA) activities and bacterial community structure were assessed in a long-term (26 years) experiment, at physiological stages of sorghum growth, comparing different management methods for organic (manure, straw residues) and inorganic (urea) amendments at the INERA field station in Saria (Burkina Faso). Annual application of manure led to the highest soil microbial biomass and enzyme activities. Investigations indicated that only microbial biomass and β-glucosidase activities were affected during the cropping season. Phosphatase and FDA enzyme activities did not depend on the crop development stages. The application of N fertilizer modified phosphatase and FDA enzyme activities, the activities being higher in soils amended with N fertilizer. The bacterial community structure was analyzed by PCR-denaturing gradient gel electrophoresis (PCR-DGGE) targeting the eubacterial 16S rRNA gene. Cluster analysis of PCR-DGGE patterns showed two major clusters, the first containing the mineral fertilization and straw treatments and the second, the straw + urea, manure and manure + urea treatments. Sorghum grain yields were the highest for
manure treatments. In this long-term experiment, applying straw did not produce a better grain yield than that obtained in the un-amended plot.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité CT1900025 P354-DIA Article scientifique CRA/Tamba Dépot numérique Exclu du prêt Documents numériques
Cliquer pour pdfURL World Journal of Microbiology and Biotechnology, N°28:. Impact of rhizobial inoculation on Acacia senegal (L.) Willd. growth in greenhouse and soil functioning in relation to seed provenance and soil origin. / N Bakhoum
World Journal of Microbiology and Biotechnology, N°28:. Impact of rhizobial inoculation on Acacia senegal (L.) Willd. growth in greenhouse and soil functioning in relation to seed provenance and soil origin. [texte imprimé] / N Bakhoum, Auteur ; F Ndoye, Auteur ; A. Kane, Auteur ; K Assigbetsé, Auteur ; D Fall, Auteur ; S.N Sylla, Auteur ; K Noba, Auteur ; D. Diouf, Auteur . - 2012 . - pp- 2567-2579.
Langues : Anglais (eng)
Catégories : FORESTERIE Mots-clés : Rhizobial inoculation, Acacia senegal, Environment, Microbial diversity, Soil biofunctioning, Fertility Résumé : Rhizobial inoculation has a positive impact on plants growth; however, there is little information about its effect on soil microbial communities and their activity in the rhizosphere. It was therefore necessary to test the effect of inoculation of Acacia senegal (L.) Willd. seedlings with selected rhizobia on plant growth, structure and diversity of soil bacterial communities and soil functioning in relation to plant provenance and soil origin. In order to carry out this experiment, three A. senegal seeds provenance from Kenya, Niger, and Senegal were inoculated with selected rhizobial strains. They have been further grown during 4 months in greenhouse conditions in two non-disinfected soils, Dahra and Goudiry coming respectively from arid and semi-arid areas. The principal component analysis (ACP) showed an inoculation effect on plant growth, hizospheric bacterial diversity and soil functioning. However, the performances of the rhizobial strains varied in relation to the seed provenance and the soil origin. The selected rhizobial strains, the A. senegal provenance and the soil origin have modified the structure and the diversity of soil bacterial communities as measured by principal component analysis/denaturing gradient gel electrophoresis analyses. It is interesting to note that bacterial communities of Dahra soil were highly structured according to A. senegal provenance, whereas they were structured in relation to rhizobial inoculation in Goudiry soil. Besides, the impact of inoculation on soil microbial activities measured by fluorescein diacetate analyses varied in relation to plant provenance and soil origin. Nevertheless, total microbial activity was about two times higher in Goudiry, arid soil than in Dahra, semi-arid soil. Our results suggest that the rhizobial inoculation is a suitable tool for improving plants growth and soil fertility. Yet, the impact is dependent on inoculants, plant provenance and soil origin. It will, therefore, be crucial to identify the appropriate rhizobial strains and plant provenance or species in relation to the soil type. Exemplaires
Code-barres Cote Support Localisation Section Disponibilité FT1900058 BAK Publication CNRF Rayons Exclu du prêt Documents numériques
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