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Inoculation of <i>Rhizobiums sp</i>Strains to Improve Soil Fertility: A Peanut Trial in Covèand Ouessè(Benin)

Agricultural Sciences 2020年第4期11卷 448-463页

作者： Alida Adjile Oscar Didagbe Carrel Ayelo Frechno Boko pascal houngnandan Roch Mongbo Laboratoire d’Analyse des Dynamiques Sociales et des Etudes du Développement (LADYD) Faculté des Sciences Agronomiques Université d’Abomey-Calavi Abomey-Calavi Bénin Laboratoire de Microbiologie des Sols et d’Ecologie Microbienne Faculté des Sciences Agronomiques Université d’Abomey-Calavi Abomey-Calavi Bénin Laboratoire de Biologie et de Typage Moléculaire en Microbiologie Faculté des Sciences et Techniques Université d’Abomey-Calavi Abomey-Calavi Bénin

Thought the increasing demand Arachis hypogaea L. (groundnut), its yields remain low with increasingly using chemical fertilizers. To reduce the costs for chemical fertilizers inquisition and their long-term toxic effects on soils, microbial bio-fertilizers could be an accessible alternative to peanut farms. Thus, the aim of this study was to assess the performance of rhizobia strains on peanut varieties production. The experiments were conducted in two agro-ecological zones of Benin, in a peasant environment peasant-researcher control or under peasant and researcher control. The experimental device used was a complete random block with nine repetitions and two factors namely inoculation (with Rhizobium sp and without Rhizobium sp) and mineral fertilizer (with N15P15K15 and without N15P15K15). The effects of these factors divided into four treatments were evaluated on the plants vegetative, symbiotic and production parameters. In addition, an evaluation of each treatments’ comparative advantages was carried out. The results showed that the association Rhizobium sp and N15P15K15 induced groundnut plants best vegetative and productive parameters. The best comparative advantages in economic terms were also recorded with the same combination (Rhizobium sp + N15P15K15). Considering the technical performance, the recorded treatments effects can be classified as follows: Control Rhizobium sp 15P15K15 Rhizobium sp + N15P15K15. Thus, the association Rhizobium sp + N15P15K15 induced both the best plants vegetative and productive parameters and the best comparative advantage from an economic point of view. The results also showed that the plants’ response to inoculation, the application of manure and their combination was more marked in the bar soil zone (Covè) than in the cotton zone (Ouessè). Considering the negative effects linked to the use of chemical fertilizers, the use of Rhizobium sp could be an interesting path to increase the groundnut production.

关键词： Arachis hypogeae L. Rhizobium sp Bio Fertilizer Soil Fertility Benin

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Enhancing Rice Productivity and Soil Nitrogen Using Dual-Purpose Cowpea-NERICARice Sequence in Degraded Savanna

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Journal of Life Sciences 2012年第11期6卷 1237-1250页

作者： Sylvester O. Oikeh Abibu Niang Robert Abaidoo pascal houngnandan Koichi Futakuchi Brahima Kone Amadu Toure Africa Agricultural Technology Foundation (AATF) Nairobi PO Box 30709-00100 Kenya Africa Rice Center (AfricaRice) Cotonou O1 BP 2031 Benin Republic Department of Biological Sciences Kwame Nkrumah University of Science and Technology (KNUST) KumasL Ghana Laboratory of Microbial Ecology Faculty of Agronomy University of Abomey-Calavi (FSA/UAC) Cotonou O1 B.P. 526 Benin

ISFM （integrated soil fertility management） involving annual sequencing of dual-purpose early-maturing first crop of cowpeas with biomass incorporation before seeding second crop of early-maturing NERICA （New Rice for Africa） was evaluated to enhance rice productivity and soil-nitrogen. Five dual-purpose early-maturing cowpea cultivars and local cultivar （Katche） were seeded early in the wet season in five farmers＇ fields at Ouake （9046＇ N, 1°35′ E, highly degraded-savanna）, Benin. After pod harvest, cowpea residues were minimally worked into the soil using minimum tillage with hand-hoe and seeded with early-maturing, resilient NERICA8 rice that received either 20 kg N/ha or zero-N. Cowpea grain yield averaged 0.1-0.3 Mg/ha, and mean aboveground cowpea biomass produced and recycled was 0.54-0.64 Mg/ha among best cultivars （IT97-568-11 and IT89KD-288）. NERICA8 seeded after cowpea cv. IT97-568-11 and supplied with 20N gave the greatest grain yield of about 2.0 Mg/ha, accounting for 500% heavier grains than fallow-rice rotation with zero-N. Mineral-N dynamics monitored under NERICA8 in year 2 showed that previous IT97-568-11 plots had the highest mineral-N at tillering which persisted till panicle initiation stage. The adoption of an ISFM comprising annual cowpea-NERICA sequence by smallholder rice farmers could enhance productivity and improve N-supply in fragile savannas.

关键词： Degraded savanna dual-purpose cowpea ISFM NERICA rice rice productivity soil nitrogen West Africa.

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Diversity of Arbuscular Mycorrhizal Fungi Species Associated with Soybean (Glycine max L. Merill) in Benin

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American Journal of Plant Sciences 2022年第5期13卷 686-701页

作者： Howell B. houngnandan Appolinaire Adandonon Trévis S. B. Adoho Leslie D. R. Bossou Adélaïde H. Fagnibo Oslo S. Gangnon Moriaque Akplo Charlotte M. Zoundji Félix Kouèlo Adolphe Zeze pascal houngnandan Laboratoire des Sciences Végétale Horticole et Forestière (LaSVHF) Université Nationale d’Agriculture (UNA) Kétou République du Bénin Laboratoire de Microbiologie des Sols et d’Ecologie Microbienne Faculté des Sciences Agronomiques de l’Université d’Abomey-Calavi (UAC) Abomey-Calavi République du Bénin Laboratoire de Biotechnologies Végétale et Microbienne Unité Mixte de Recherche et d’Innovation en Sciences Agronomiques et Génie Rural Institut National Polytechnique Felix Houphou&#235 t-Boigny (INPHB C&#244 te d’Ivoire) Yamoussoukro C&#244 te d’Ivoire Ecole de Gestion et de Production Vegetale et Semenciere (EGPVS) Université Nationale d’Agriculture (UNA) Kétou République du Bénin

Arbuscular Mycorrhizal Fungi (AMFs) could be used to sustainably improve crop yields. The present study evaluated the diversity of AMF species associated with soybean (Glycine max L. Merill) in main soybean-producing areas in Benin. Composite soil samples from 13 production areas at a rate of 04 villages per production areas were collected. A spore trapping device was set up to reveal the diversity of spores. The physical and chemical properties of the soils, the frequency and intensity of mycorrhization of roots, and the diversity of AMF spores were determined in the soil samples following trapping. As result, eight morphotypes belonging to four genera: Glomus, Acaulospora Gigaspora and Disversispora and three families: Diversisporales, Glomérales and Paraglomérales were observed. An important variability of spore densities was observed from one production areas to another with a higher abundance in the production areas of Copargo estimated at 3584 spores/100g soil. The biological diversity indexes as Shannon (0.0311), Simpson (0.0204) and Hill (0.0235), varied significantly (p < 0.05) from one production areas to another. There was significant correlation between the parameters studied, particularly between the physico-chemical parameters of the soils and between the physico-chemical parameters and the biological diversity indexes. For the mycorrhization parameters, the mycorhization frequencies did not vary from one production areas to another, unlike the intensities, which significantly varied from one production areas to another (2.31% to 24.62%). Finally, this study revealed that the physico-chemical parameters of the soils had an influence on the other parameters studied. Moreover, there were an abundance and a significant diversification of AMFs associated with soybean in the different production areas, which are influenced by certain physico-chemical soil parameters.

关键词： Arbuscular Mycorrhizal Fungi (AMFs) Soybean Spore Density Diversity

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Resistance to Abiotic Stress and Effectiveness of Native Rhizobia on Bambara Groundnut [Vigna subterranea (L.) Verdc.] in Benin

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Open Journal of Soil Science 2022年第6期12卷 193-215页

作者： Mahougnon Carmelle Charlotte Zoundji Agassin Martinien Arcadius Ahoglé Tobi Moriaque Akplo Sèmèvo Oslo Gangnon Diorel Montéiro Yves Zanvo Félix Kouelo Alladassi pascal houngnandan Laboratoire des Sciences Végétales Horticoles et Forestières Université Nationale d’Agriculture Kétou Benin Ecole de Gestion et de Production Végétale et Semencière Université Nationale d’Agriculture Kétou Benin Laboratoire de Microbiologie des Sols et d’Ecologie Microbienne Faculté des Sciences Agronomiques Université d’Abomey-Calavi Cotonou Benin Department of Spatial and Environmental Planning Kenyatta University Nairobi Kenya Faculté d’Agronomie Université de Parakou Parakou Benin

Bambara groundnut [Vigna subterranea (L.) Verdc.], as a legume, can establish relationships with nitrogen-fixing bacteria such as Rhizobium. However, Rhizobium efficacy is not always optimal due to the lack or poor efficient strains in the soil. This study aimed to evaluate symbiotic efficiency of endogenous Rhizobia nodulating Bambara groundnut and their resistance to abiotic conditions. Root nodules were randomly sampled from three agroecological zones across the country, surface sterilized, ground and paste plated on YEMA media. After 24 hours, the bacterial colonies were purified. The pure cultures were further characterized using morphological and biochemical methods and their resistance to antibiotics and heavy metals was evaluated. Lastly, the symbiotic efficiency of the isolates was assessed through a greenhouse experiment. A total of eighty-five presumptive strains were isolated from Bambara groundnut roots nodules obtained from the farms. The physiological characterization of the isolated showed a decrease in isolates growth when NaCl concentration was more than 7%. In addition, 47% of the isolates were tolerant to a temperature of 40°C. Most of the isolates were highly resistant to Erythromycin in all its concentration levels and to Kanamycin, Spectinomycin, Neomycin and Ampicillin at 10 μg⋅mL−1. Most of them showed resistance to Cu and Zn at 10 μg⋅mL−1. Results of the effectiveness test on two Bambara groundnut varieties yielded dry shoot matter varying from 3.33 g⋅plant−1 to 7.21 g⋅plant−1 for variety 1 and from 4.38 g⋅plant−1 to 8.38 g⋅plant−1 on variety 2. N uptake ranged between 0.09 g⋅plant−1 and 0.29 g⋅plant−1 for variety 1 and between 0.12 and 0.29 g⋅plant−1 for variety 2. The isolates yielding higher shoot dry weight and N uptake were LMSEM312, LM

关键词： Indigenous Rhizobia Nitrogen Fixation Biodiversity Bambara Groundnut West Africa

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Variation of Physical and Chemical Properties of Soils under Different Cropping Systems in the Watershed of Kpocomey, Southern Benin

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Open Journal of Soil Science 2020年第11期10卷 501-517页

作者： Alladassi Félix Kouelo Alohoutade Finagnon Mathieu Avakoudjo Julien Akplo Tobi Moriaque Agodo Lambert Agonvinon Mahugnon Socrate houngnandan pascal Azontonde Hessou Anastase Amadji Guillaume Lucien Saïdou Aliou Laboratory of Soil Microbiology and Microbial Ecology Faculty of Agronomic Sciences of University of Abomey-Calavi Abomey-Calavi Benin Laboratory of Applied Ecology Faculty of Agronomic Sciences of University of Abomey-Calavi Abomey-Calavi Benin Laboratory of Research in Population and Development Sciences University of Parakou Parakou Benin Soil Water and Environmental Sciences Laboratory National Institute of Agricultural Research of Benin Abomey-Calavi Benin Research Unit of Eco-Pedology Laboratory of Soil Sciences Faculty of Agronomic Sciences University of Abomey-Calavi Abomey-Calavi Benin Integrated Soil and Crop Management Research Unit Laboratory of Soil Sciences Faculty of Agronomic Sciences University of Abomey-Calavi Abomey-Calavi Benin

Soils degradation is one of the constraints in food security achievement in Benin. This study aimed at assessing the effect of cropping systems and slope on soil physical and chemical properties in the watershed of Kpacomey located in the Aplahoué district. Soil samples were collected from three parallel transects along the slope. Sampling was carried out under different treatments combining cropping systems (Maize-Cassava, pure Palm grove, Palm grove-Maize-Cassava and Teak Plantation) along with slope levels (low slope, medium slope and high slope degree). The impact of cropping systems and slope on soil properties was assessed by determining the physical and chemical parameters. The cropping systems significantly (p 3) was recorded under the Palm grove-Maize-Cassava cropping system while the highest (1.47 g/cm3) was obtained with pure Palm grove cropping system. Root biomass was more abundant (0.28%) with the pure Palm grove cropping system. However, root biomass was significantly (p 0.05) on the effect of cropping systems and slope. Moreover, cropping systems resulted in significant effects (p < 0.05). Soil organic matter and soil-assimilated phosphorus content were significantly influenced by the effect of the slope. These findings indicated that cropping systems and slope are significant drivers in soil degradation in the Kpacomey watershed and bringing out cropping systems that best aim at soil conservation.

关键词： Cropping Systems Soil Organic Matter Soil Degradation Benin

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Effect of Sustainable Land Management Practices on the Soil Erodibility at the Plateau of Abomey (Centre of Benin)

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Open Journal of Soil Science 2022年第7期12卷 323-337页

作者： Kouelo Alladassi Félix Medezo Arnaud Akplo Tobi Moriaque Houenou Saïdi Avakoudjo Julien Agodo Lambert Dotonhoue Coffi Fulgence Gbèwommindéa Sogbegnon Ahowanou Roméo Amadji Firmin Zoundji Mahougnon Carmelle Charlotte houngnandan pascal Djedje Mélanie Laboratory of Soil Microbiology and Microbial Ecology Faculty of Agronomic Sciences University of Abomey-Calavi (LMSEM/FSA/UAC) Abomey-Calavi Benin Laboratory of Applied Ecology Faculty of Agronomic Sciences University of Abomey-Calavi (LEA/FSA/UAC) Abomey-Calavi Benin Soil Protection and Rehabilitation Project to Improve Food Security (ProSOL/GIZ) Parakou Benin Sol Consult Africa (SolCA) Abomey Benin Laboratory of Plant Horticultural and Forestry Sciences National University of Agriculture (LSVHF/UNA) Kétou Benin

The soils of Benin in general and those of the department of Zou, in particular, are highly degraded. This study aimed to evaluate the effectiveness of sustainable land management practices on soil erodibility in two villages in the Plateau of Abomey. Soil samples were collected on plots under Sustainable Land Management (SLM) measures (direct seeding, maize residue management and soybean-cereal rotation) and on their adjacent control. The soil samples were prepared and analyzed in laboratory to determine variables such as soil permeability, organic matter content, and particle size. Soil erodibility was determined as proposed by Wischmeier & Smith. The effect of SLM practices was significant (0.02) on soil permeability. On plots under SLM measurements, soil permeability is higher with an average of 93.97 mm/h at Folly and 82.43 mm/h at Hanagbo. SLM measurements significantly (0.04) added organic matter to the soil. The average organic matter of the plots under SLM measures in Folly varies from 0.73% to 1.39% while it varies from 0.49% to 0.73% in the control plots. In Hanagbo, the average organic matter of the plots under SLM measures varies from 1.86% to 2.48% against 1.41% to 1.66% for the control plots. Regarding soil erodibility, it was found that the influence of SLM measures is significant in both villages. In villages, direct seeding and maize residue management significantly (0.008) reduced soil erodibility compared to their adjacent controls, while the soybean-cereal rotation measure increased soil erodibility compared to plot witnesses. The average soil erodibility of plots under SLM measures varies by 0.21 t⋅h/Mj⋅mm at 0.38 t⋅h/Mj⋅mm in the village of Hanagbo and 0.25 t⋅h/Mj⋅mm at 0.38 t⋅h/Mj⋅mm in the village of Folly. It varies from 0.24 t⋅h/Mj⋅mm at 0.28 t⋅h/Mj⋅mm for the control plots at Hanagbo and 0.31 t⋅h/Mj⋅mm at 0.37 t⋅h/Mj⋅mm in Folly. These practices can therefore

关键词： Water Erosion Cropping Systems Sustainable Land Uses Soil Erodibility Centre of Benin

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Variation of Physical and Chemical Properties of Soils under Different Cropping Systems in the Watershed of Kpocomey, Southern Benin

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Open Journal of Soil Science 2020年第11期

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