Manioc : Audio-Vidéo | resultats 1 - 8 pour la recherche: Microbe

Résultats pour la recherche : Microbe

8 documents satisfont la requête.

Nombre de mots: Microbe: 8

Impact écotoxicologique de pesticides sur les communautés microbiennes naturelles responsables de la biodégradation de pesticides dans les sédiments de rivière
Auteur(s) : Devers-Lamrani
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Quelles plantes assainissantes pour réduire l'impact du flétrissement bactérien sur tomate en Martinique ?
Auteur(s) : Debert, Peninna
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Devenir de la chlordécone en conditions méthanogéniques
Auteur(s) : Macarie, Hervé
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Caractérisation de populations microbiennes tolérantes au chlordécone à partir de sols contaminés des Antilles
Auteur(s) : Merlin, Chloé
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Contribution à la technologie durable pour la remédiation des sols et sédiments pollués avec pesticides - réacteur électro-biochimique de nouveau type
Auteur(s) : Poggi-Varaldo, Hector
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Evaluation de la contamination des sédiments des mangroves de Martinique par des pesticides agricoles (chlordécone, cadusaphos)
Auteur(s) : Guiral, Daniel
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Applying C-13 techniques in exploring the carbon sequestration potential of limed acid soils fromt Trinidad
Auteur(s) : Gouveia, Grégory
Année de publication :

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Éditeur(s) : University of West Indies, Trinidad &Tobago Université des Antilles. Service commun de la documentation
Extrait de : 52e congrès annuel de la Société caribéenne des plantes alimentaires / 52nd annual meeting of the Caribbean food crops society (CFCS), du 10 au 16 juillet 2016. INRA, CFCS
Description : Carbon dioxide (CO2) accounts for the largest proportion (74%) of total greenhouse gas (GHG) emissions globally, with agricultural activities contributing approximately 25% of this gas. Opportunities to reduce the emissions in the sector can therefore contribute significantly to mitigating global climate change. Ag-lime is used extensively to alleviate problems of soil acidity and the potential for this material to contribute to C sequestration in soils is gaining interest among researchers. A laboratory experiment using C-13 isotopic labelling techniques was therefore established to answer the following questions: 1) Is there a potential for sequestering C using ag-lime in Trinidad acid soils? 2) Does enhancing soil microbial respiration by applying labile organic amendments enhance the C sequestration potential of ag-lime? 3) Are lime-derived C (LDC) estimates from non-isotopic difference technique comparable to that from the C- 13 isotopic labelling technique? The results ascertained for the study showed significant (P<0.05) differences between the LDC estimates from the two techniques with the non-isotopic techniques yielding higher estimates. Over the 32- day experiment, between 16.4 to 85.4% of the ag-lime C was released as CO2 with values being lower for the Piarco soil. The LDC in the CO2 was also significantly (P<0.05) lower for the poultry litter treatments comparison to the other organic amendments for the Piarco soil but not the Nariva soil. This effect may not have been as a result of an enhancement of the carbon sequestration potential of the ag-lime due to an elevation in soil microbial respiration since the LDC in the glucose-amended soils did not differ significantly from the no-amendment control soils.
Siècle(s) traité(s) : 21
Permalien : http://www.manioc.org/fichiers/V16308

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Evaluating the effect of vesticular-arbuscular mycorrhizae on tomato plantgrowth and production
Auteur(s) : Awadhpersad, Vijantie
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Éditeur(s) : University of Suriname Université des Antilles. Service commun de la documentation
Extrait de : 52e congrès annuel de la Société caribéenne des plantes alimentaires / 52nd annual meeting of the Caribbean food crops society (CFCS), du 10 au 16 juillet 2016. INRA, CFCS
Description : Tomato is one of the most popular vegetables in the world. Therefore, for improvement in crop productivity in Suriname and most other countries, excessive application of pesticides and synthetic fertilizers is used. These result in gradual depletion of soil fertility and microbial diversity. Conventionally managed soils are found to exhibit a poorer micro flora and a lower biological activity then organically managed soils. Recently much attention is paid to organic cultivation and the use of bio fertilizers as a supplement for chemical fertilizers. VAM fungi have the potential to improve the sustainability of tomato production by improving yield and quality. Therefore, the aim of the study was to evaluate the effect of two different concentrations of commercially available vesicular - arbuscular mycorrhiza on the plant growth and fruit production of two tomato varieties (Lycopersicon esculentum Mill.) in the greenhouse.The experiment was set up as a randomized factorial block design with two independent factors and consisted of six treatments and three replications. The factors were two tomato varieties: hybrid 61 and hybrid 501 and two concentrations of VAM namely 2.5 and 10 g. VAM/plant. Biomass was determined two times, at bloom initiation and at the end of the experiment. The growth parameters were measured once per week. The production was recorded only for the first two harvest times. Data was statistically analyzed using three-way ANOVA. The results of this experiment showed that the VAM fungi had a positive influence (p < 0.05) on the production for both varieties of tomatoes. And it also resulted in earlier reproduction. There was no significant difference in production (p > 0.05) between the two concentrations of VAM inoculum used.
Siècle(s) traité(s) : 21
Permalien : http://www.manioc.org/fichiers/V16303

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