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Ecological Structure and Prediction Equations for Estimating Tree Age, and Dendometric Parameters of Acacia senegalin the Senegalese Semi-Arid Zone—Ferlo

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American Journal of Plant Sciences 2013年第5期4卷 1046-1053页

作者： Aly Diallo emile codjo agbangba Ousmane Ndiaye Aliou Guisse Département de Biologie Végétale Faculté des Sciences et Techniques Université Cheikh Anta Diop Dakar-Fann Sénégal

The development of equations to predict tree height, crown diameter, crown depth from stem diameter of a tree species enables arborists, researchers, and urban forest managers to model costs and benefits, analyze alternative management scenarios, and determine the best management practices for sustainable forests. The objective of this study was to develop regression prediction models for tree age, tree height, crown diameter, crown ratio and crown depth for A. senegal growing in Ferlo, in the northern Senegal. Four plantations of different years old (ISRA, 10 years old plantations, Ndodj, 8 years old plantations, Boulal, 5 years old plantations and Déali, 4 years old plantations) were selected. The following dendometric variables: crown height, crown diameter, stem diameter at the breast height, stem basal diameter (at 0.30 m) and the height from the tree base to first branch were measured on a total of 489 trees. The results suggested that the ecological structure of the different year old A. Senegal plantation revealed a bell-shaped form with left dissymmetric distribution indicating a predominance of individuals with small diameter at breast height. Allometry study of A. Senegal showed highly significant positive correlations (p = 0.00) between stem diameter at breast height, stem basal diameter, tree height, crown diameter and crown depth. Positive correlations were also found between crown diameter, tree height and crown height. Prediction models derived from these relationships can be used to estimate the tree height, stem diameter at breast height and crown depth from crown diameter with greater precision. As for A. Senegal age estimation, the established model is not strong as it can explain only 49.1% of the age variation.

关键词： Ecological Structure Stem Diameter at Breast Stem Basal Diameter Crown Diameter Crown Depth Tree Height Age Correlation Regression Acacia senegal Northern Senegal

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Residual Effects of Sucrose and Hormonal Treatments of the Tuberization Medium on in VitroGermination of Potato (Solanum tuberosumL.) Microtubers

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American Journal of Plant Sciences 2013年第9期4卷 1872-1878页

作者： Abraham Diémé Mame Abdou Nahr Sambe emile codjo agbangba Mame Ourèye Sy Laboratoire Campus de Biotechnologies Végétales Département de Biologie Végétale Faculté des Sciences & Techniques Université Cheikh Anta Diop Dakar Sénégal Laboratoire Campus de Biotechnologies Végétales Département de Biologie Végétale Faculté des Sciences & Techniques Université Cheikh Anta Diop Dakar Sénégal Laboratoire d’Ecologie Végétale et d’Ecohydrologie Département de Biologie Végétale Faculté des Sciences & Techniques Université Cheikh Anta Diop Dakar Sénégal.

The residual effects of sucrose concentrations (80 or 100 g·L-1) and hormonal treatments (BAP + Kinetin or Coumarin) of tuberization medium on in vitro microtubers germination of three potato varieties (Solanum tuberosum L.) so called Aida, Atlas and Odessa, are described. After 3 weeks of incubation at 28℃ ± 1℃, 70% of Aida microtubers variety, previously formed in the MT2 medium [MS/2 + 80 g·L-1 Sucrose], germinated. The best germination rate for varieties Atlas (100%) and Odessa (66.66%) was obtained on microtubers previously formed in the medium MT2 [MS/2 + 100 g·L-1 Sucrose]. The addition of hormones in the tuberization medium allowed optimizing the microtubers germination of the Aida variety unlike the other varieties. Indeed, for the Aida variety, the combination M5 [Kin 2.5 mg·L-1 + Coum 0.025 mg·L-1 + Sucrose 80 g·L-1] increased the germination rate from 70% up to 93.33%. The best germination rate (90%), noticed with microtubers of Atlas variety, initially formed in M2 medium [Kin 1 mg·L-1 + BAP 1 mg·L-1 + Sucrose 100 g·L-1], was lower than that one (100%) obtained on medium without hormones. For Odessa variety, the maximum germination rate (53.33%) of microtubers, from the medium M4 [Kin 2.5 mg·L-1 + BAP 1 mg·L-1 + Sucrose 100 g·L-1], was also lower than that one (66.66%) observed in the medium without hormones. Aida and Atlas varieties thus offer a better germination rate than Odessa after their cold storage.

关键词： Solanum tuberosum Microcuttings Microtubers In Vitro Germination Sucrose Cytokinins Coumarin

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Quantification of Ecosystem Services Provided by Pterocarpus lucensLepr. Ex Guill. and Perrott.: Forage Production, Timber and Carbon Sequestration in the Biosphere Reserve of Ferlo (Northern Senegal)

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American Journal of Plant Sciences 2014年第5期5卷 766-777页

作者： Daouda Ngom emile codjo agbangba Thioro Fall Sekouna Diatta Léonard E. Akpo Department of Agroforestery Unité de Formation et de Recherche de Sciences et Technologie (UFR ST) University Assane Seck of Ziguinchor Ziguinchor Senegal Department of Agroforestery Unité de Formation et de Recherche de Sciences et Technologie (UFR ST) University Assane Seck of Ziguinchor Ziguinchor Senegal Department of Plant Biology Faculty of Science and Technology University Cheikh Anta Diop of Dakar Dakar Senegal Department of Plant Biology Faculty of Science and Technology University Cheikh Anta Diop of Dakar Dakar Senegal

This study aims at quantifying the most important ecosystem services: forage production, timber production and carbon sequestration provided by Pterocarpus lucens to local communities of Ferlo Biosphere Reserve. The results suggested that the ecological structure of Pterocarpus lucens revealed a bell-shaped form with left dissymmetric distribution indicating a predominance of individuals with small circumference and height. A regression using the software Minitab 16, with circumference and the height as explanatory variables, has allowed a development of predictive models for the estimation of the produced forage and the quantification of the timber supplied by one of the most used plant species in Sahelian pastures. Forage production of Pterocarpus lucens was estimated at 178 kg DM/ha. This large value of forage showed the predominance of this species in animal feed in the Sahel. The quantity of wood produced was 545 kg DM/ha while the quantity of above ground sequestered carbon was 325.35 kg of C/ha. Those estimations are interesting in the implementation context of the Ferlo Biosphere Reserve which aims at matching the productive capacity of ecosystems with the needs of local communities.

关键词： Ecosystem Services Regression Forage Timber Production Carbon Sequestration

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Effects of protein and mineral supplementation on the performance of lactating dairy cows gobra and crossbreed guzerat during the dry season in senegal

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Open Journal of Animal Sciences 2014年第1期4卷 18-22页

作者： Fat Cheikh Ndione emile codjo agbangba Ousmane Ndiaye Idrissa Sane Abdou Diouf Amadou Tamsir Diop Centre de Recherches Zootechniques de Dahra Institut Sénégalais de Recherches Agricoles Dahra Sénégal Département de Biologie Végétale Université Cheikh Anta Diop Dakar Sénégal Laboratoire national D’élevage et de Recherche Vétérinaire (LNERV) Institut Sénégalais de Recherches Agricoles Dakar Sénégal

The purpose of this study carried out in the township of Dahra was to access the effect of dry season protein and mineral supplementation of Gobra and Crossbreed Guzerat cows on milk production. The experimental design is a completely randomized block. The treatments were: supplement of molasse-urea blocks with supplement of hay;supplement of molasse-urea blocks without any hay;no supplement of molasse-urea blocks and supplement of hay;no supplement of molasse-urea block without any hay. For each breed, the treatments were replicated three times on a lot of cows with the similar zootechnic parameters. A total of twelve lactating cows per breed were then used. The supplement of block + hay has significantly (p < 5%) allowed obtaining the largest average daily quantity of milk: 1.9 ± 0.7L/day/cow and 2.4 ± 0.8 L/day/cow respectively in Gobra and Crossbreed Gobra*Guzerat. The increases in production compared to the control treatment (without supplement) are 52.63% and 100% respectively in the breed Gobra and Gobra*Guzerat. The supplement of hay comes in the second place and contributes to an additional production of 66.66% in both breeds of cow. Then, the supplement of block follows and it allows increasing the production of 44.44% and 50% respectively in Gobra and Crossbreed. In both races, the supplement of block + hay has allowed obtaining the highest profits of $1.6/L/day/cow for Gobra and $ 2.8/L/day/cow for the Crossbreed, that equals to an increase by $ 0.3 and $ 0.9 compared to the control treatment. The supplement of hay and the block supplement have respectively given a profit of 0.4 and $ 0.3/L/day/cow in Gobra and 0.6 and $ 0.4/L/day/cow in the Crossbreed. The adoption of supplementation molasse-urea block + hay by producers appears an alternative to boost milk production in dry season.

关键词： Milk Yield Supplements Gobra Guzerat Dry Season

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Mineral Fertilization Influences the Acceptability of Fresh Pulp and Juice Made from Sugarloaf Pineapple

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Agricultural Sciences 2020年第3期11卷 342-353页

作者： Sabai Kate Elvire Line Sossa codjo emile agbangba Rodrigue Idohou Edmond Sacla Aide Gbènoukpo Pierre Tovihoudji Brice Sinsin Institut National des Recherches Agricoles du Benin CotonouBenin Laboratoire des Sciences du Sol Département de Production VégétaleUniversitéd’Abomey-CalaviCotonouBenin Laboratoire de Biomathématiques et d’Estimations Forestières Universitéd’Abomey-CalaviCotonouBénin Laboratoire de Recherche en Biologie Appliquée Ecole Polytechnique d’Abomey-CalaviUniversitéd’Abomey-CalaviCotonou Benin Ecole de Gestion et de Production Végétale et Semencière Université Nationale d’AgricultureKetouBenin Laboratory of Hydraulics and Environmental Modeling(HydroModE-Lab) Facultéd’AgronomieUniversitéde ParakouParakouBenin Laboratoire d’Ecologie Appliquée Universitéd’Abomey-CalaviCotonouBénin

Fertilization practices can influence the quality of pineapple fruit and consequently its acceptability by consumers who are increasingly oriented towards high quality agri-food products. This study aimed at evaluating the influence of N, P and K on some physico-chemical and organoleptic characteristics of pineapple (Ananas comosus L. Merr) for fresh consumption and juice processing. A complete NPK factorial design was installed in the south Benin. The treatments NPK in g plant-1 were randomized into four blocks: T1;T2;T3;T4;T5;T6;T7;T8;T9. Brix juice was determined using a refractometer and pH with a pH meter. An evaluation of sensory characteristics such as sweetness, acid taste and aroma of fresh pineapple pulp and processed juice was made by a panel of tasters selected and trained. A principal components analysis, followed by a numerical classification was performed on fruits’ sensory and physicochemical characteristics. Results showed that juice pH was significantly influenced by the phosphorus and potassium. Potassium influenced significantly juice yield. Some physico-chemical characteristics and sensory attributes were correlated between them and groups of treatments are formed for both the juice and the fresh fruit.

关键词： Ananas comosus Fertilizer Fruit Intensification Juice Sensory

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Inoculation with arbuscular mycorrhizal fungi improves seedlings growth of two sahelian date palm cultivars (Phoenix dactyliferaL., cv. Nakhla hamra and cv. Tijib) under salinity stresses

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Advances in Bioscience and Biotechnology 2014年第1期5卷 64-72页

作者： Ibrahima Léopold Djitiningo Diatta Aboubacry Kane codjo emile agbangba Maurice Sagna Diegane Diouf Frédérique Aberlenc-Bertossi Yves Duval Alain Borgel Djibril Sane IRD Institut de Recherche pour le Développement Montpellier France Laboratoire Campus de Biotechnologies Végétales Département de Biologie Végétale Faculté des Sciences et Techniques Un-iversité Cheikh Anta Diop Dakar Sénégal Laboratoire Campus de Biotechnologies Végétales Département de Biologie Végétale Faculté des Sciences et Techniques Un-iversité Cheikh Anta Diop Dakar Sénégal Laboratoire Commun de Microbiologie IRD/ISRA/UCAD Route des Hydrocarbures Dakar Sénégal Laboratoire d’Ecologie et d’Ecohydrologie Département de Bi-ologie Végétale Faculté des Sciences et Techniques Université Cheikh Anta Diop Dakar Sénégal

This study presents an analysis of the impact of mycorrhizal inoculation on growth under salt stress of date palms cultivars Nakhla hamra (NHH) and Tijib known in the Sahel for their earliness in flowering and fruiting. The seedlings were grown in a greenhouse on a sandy substrate watered to field capacity every two days and were subjected to increasing levels of NaCl (0, 1, 2, 4, 6, 8 and 16 g·L-1) and then inoculated with 5 strains of Glomus (G. aggregatum, G. intraradices, G. verriculosum, G. mosseae, G. fasciculatum). The experimental design was a randomized complete block with three factors (cultivars: Tijib and Nakhla Hamra x seven levels of NaCl concentrations x six levels of inoculum). The results showed that in the absence of NaCl, G. verriculosum significantly enhanced shoot growth: 33.5 cm against 30.3 cm in the control and roots growth: 81.5 cm against 78 cm in NHH, while in Tijib, the growth is stimulated by Glomus fasciculatum: 33.8 cm against 32.7 cm for stems and 90 cm against 86 cm for the roots of inoculated plants and controls. In contrast, in the presence of NaCl 8 g·L-1, NHH has a better growth in the presence of G. intraradices: 37.3 cm against 30.6 cm for stems and 77 cm against 73 for roots, while Tijib grows better in the presence of G. fasciculatum with respectively 31.9 cm against 31.7 cm and 51.27 cm against 51.6 cm for stems and roots of inoculated plants and controls. Biochemical analysis revealed that changes in levels of proline depend on the cultivar, the mycorrhizal strain used and concentrations of NaCl applied. These results open the prospect of using mycorrhizal fungi to improve the productivity of palm trees in the Sahel.

关键词： Sahel Date Palm Salinity Inoculation Mycorrhizae Glomus Proline

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Inorganic Fertilizer Adoption, Use Intensity and Rainfed Rice Yield in Benin

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Open Journal of Soil Science 2020年第1期10卷 1-15页

作者： Firmin N. Anago Dagbenonbakin G. Dieudonné agbangba C. emile Oussou C. T. Brice Amadji L. Guillaume Laboratory of Soil Sciences School of Plant Production Faculty of Agricultural Sciences University of Abomey-Calavi Cotonou Benin Laboratory of Soil Science Water and Environment Research Agricultural Center of Agonkanmey National Institute of Agronomic Research of Benin Cotonou Benin Laboratory of Applied Biology Research and Study Polytechnic School of Abomey-Calavi Department of Environment Genius University of Abomey-Calavi Cotonou Benin

Inorganic fertilizers are alternative ways of providing the necessary nutrients to rice crop and increase its productivity. In order to identify the factors determining inorganic fertilizer technology adoption and rainfed rice yield, a survey was carried out among 763 farmers in 11 municipalities in four agriculture development centers (ADC) of Benin. Composite soil samples were collected from 227 farmer fields and analyzed at the laboratory. Rainfed rice yields were determined in these different fields. Data collected was analyzed with R version 3.5.1 software. Results show that inorganic fertilizer technology adoption depends significantly on age, educational status, household size, contribution of rice to household income and organic fertilizer use (0.004 kg⋅ha−1?with a mean of 74.68 kg⋅ha−1. The quantities of inorganic fertilizer applied differ more importantly from one farmer to another and range from 4.58% to 90.5% with a mean of 27.15% of the level recommended by research. However, nitrogen, phosphorous, potassium, organic carbon, pH water, and exchanging capacity cation determine the rainfed rice yield. The policies that aim at promoting inorganic fertilizer among rainfed rice farmers must take into account these factors.

关键词： Endogenous Cropping Systems Double Hurdle Model Regression Tree Inorganic Fertilizer

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Mineral Fertilizer Use for Optimal Groundnut Production in the Sudano-Guinean and Sudanian Zones of Benin

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Open Journal of Soil Science 2021年第2期11卷 72-92页

作者： Faki O. Chabi Gustave D. Dagbenonbakin emile C. agbangba Issa Mouftaou Augustin O. Bankolé Brice T. Oussou Léonard E. Ahoton Guillaume L. Amadji Aliou Saïdou Integrated Soil and Crop Management Research Unit Laboratory of Soil Sciences Crop Sciences School Faculty of Agronomic Sciences University of Abomey-Calavi Cotonou Benin Institut National des Recherches Agricoles du Benin Cotonou Benin Laboratory of Research in Applied Biology Department of Environmental Engineering Polytechnic School of Abomey-Calavi University of Abomey-Calavi Cotonou Benin Laboratoire des Sciences du Sol Eau et Environnement (LSSEE) Centre de Recherche d’Agonkanmey Institut National des Recherches Agricoles du Benin (INRAB) Cotonou Benin Laboratory of Soil Science Faculty of Agronomic Sciences University of Abomey-Calavi Abomey-Calavi Benin

Abstract This study aims to determine the optimal N, P, K, Mg and Zn rates for groundnut production on Ferric and Plintic Luvisol in the Sudano-Guinean and Sudanian zones of Benin Republic. Two years (2018 and 2019) experiment was carried out in the municipality of Ouessè in the Sudano-Guinean zone and Bembèrèkè in the Sudanian zone. The tested nutrient doses were N (0, 20 and 40 kg⋅ha−1), P (0, 25 and 50 kg⋅ha−1), K (0, 20 and 40 kg⋅ha−1), Mg (0, 15 and 30 kg⋅ha−1) and Zn (0, 4 and 8 kg⋅ha−1). The Box and Behnken rotating design is used to define the N, P, K, Mg and Zn rate combinations leading to 46 combinations. A completely randomized bloc design was setting up considering farmers as replication. In total, four farmers’ fields were selected. A one-way analysis of variance is carried out on yield data, using the linear mixed-effect model. Response surface analyses were used to determine the optimal doses for each N, P, K, Mg and Zn. Nodule production (6.5 times higher than the control), number of gynophores (2.8 times higher than the control) and root length (19.2 ± 0.2 cm) of groundnut plants were significantly (p = 0.0001) improved with nutrient application. The response surface analysis shows that treatments N-P-K-Mg-Zn of 16.01-20.18-6.70-5.65-2.47 (in the Sudano-Guinean zone) and 13.1-25.07-11.47-0-1.82 (in the Sudanian zone) are the optimal rates that have induced optimal yield of 2.1 t⋅ha

关键词： Soil Fertility Response Surface Box and Behnken Design Modeling Micronutrient

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