scholarly journals Effets du lit, de la densité de plantation et de la fertilisation sur la croissance végétative de l’ananas (Ananas comosus L., var. MD2) à différentes saisons de planting dans la zone de Bonoua en Côte d’Ivoire

2020 ◽  
Vol 14 (7) ◽  
pp. 2398-2414
Author(s):  
Marcelline Yao ◽  
Brahima Camara ◽  
Mamadou Cherif ◽  
Généfol Ouattara ◽  
Lezin Edson Bomisso ◽  
...  
Keyword(s):  
Trace Elements ◽  
Cote D'ivoire ◽  
Vegetative Growth ◽  
Côte D’Ivoire ◽  
Dry Season ◽  
Polyethylene Film ◽  
Ananas Comosus ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Complete Fertilizer

L’objectif de ce travail était de définir un itinéraire de culture favorable à la croissance des plants d’ananas MD2 en fonction des saisons de mise en culture dans la localité de Bonoua, au Sud - Est de la Côte d’Ivoire. Les effets de trois lits de plantation (terrain plat, billon sans un film polyéthylénique et billon recouvert avec un film polyéthylénique) ; de deux densités de plantation (50000 et 70000 plants/ha) ; de quatre types de fumure [F1 (Urée + Potasse) ; F2 (Urée + Potasse + Oligoéléments) ; F3 (Urée + Potasse + Engrais complet) et F4 (Urée + Potasse + Engrais complet + Oligoéléments)] et de deux fréquences d’application de fertilisants (3AP et 7AP) ont été testés. Au terme de la phase végétative du cycle, les comparaisons intersaisons des paramètres mesurés ont montré que quels que soient les traitements appliqués, le nombre de feuilles vivantes et la longueur de la feuille D les plus importants, ont été obtenus lorsque les plantings ont été réalisés à la grande saison pluvieuse. Les masses des feuilles D ont été supérieures au seuil de 70 g pour les plantings effectués pendant la petite et la grande saison pluvieuse, ainsi qu’à la grande saison sèche. La confection de billons a permis aux plants d’ananas MD2 d’avoir une bonne croissance végétative en saison sèche dans la localité de Bonoua.Mots clés : Ananas MD2, croissance, feuille D, saison, Fertilisant, Côte d’Ivoire. English Title: Effects of bedding, planting density and fertilization on the vegetative growth of pineapple (Ananas comosus L., var. MD2) at different planting seasons in the Bonoua zone in Côte d'Ivoire The objective of this work was to define a cultivation itinerary favorable to the growth of MD2 pineapple plants according to the growing seasons in the locality of Bonoua, in the South - East of Côte d'Ivoire. The effects of three planting beds (flat ground, ridge without a polyethylene film and ridge covered with a polyethylene film); two planting densities (50,000 and 70,000 seedlings/ha); four types of manuring [F1 (Urea + Potash)]; F2 (Urea + Potash + Trace elements); F3 (Urea + Potash + Complete fertilizer) and F4 (Urea + Potash + Complete fertilizer + Trace elements)] and two fertilizer application frequencies (3AP and 7AP) were tested. At the end ofthe vegetative phase of the cycle, inter-season comparisons of the measured parameters showed that, regardless of the treatments applied, the most important number of live leaves and leaf length D were obtained when the plantings were carried out during the long rainy season. The D-leaf masses were above the threshold of 70 g for plantings carried out during the short and long rainy seasons, as well as during the long dry season. The making of ridges allowed the MD2 pineapple plants to have a good vegetative growth during the dry season in the locality of Bonoua.Keywords: Pineapple MD2, growth, leaf D, season, Fertiliser, Côte d’Ivoire.

Effects of Planting Bed and Density on the Yield of Pineapple (Ananas comosus L. var., MD2) Grown in Short Rainy Season in Southern Côte d’Ivoire

2016 ◽  
Vol 11 (1) ◽  
pp. 18-25
Author(s):  
Ouattara Genefol ◽  
Camara Brahima ◽  
Bomisso Edson Lezi ◽  
Cherif Mamadou ◽  
Sorho Fatogoma ◽  
...  
Keyword(s):  
Cote D'ivoire ◽  
Rainy Season ◽  
Côte D’Ivoire ◽  
Ananas Comosus ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Short Rainy Season

scholarly journals Premières données sur les variations saisonnières de la communauté d’oiseaux du barrage urbain de Koko (Korhogo, Côte d’Ivoire)

2019 ◽  
Vol 41.2 ◽  
pp. 6926-6939
Author(s):  
NIAMIEN Coffi Jean Magloire ◽  
KONAN Ekoun Michaël ◽  
ODOUKPE Kadio Saint Guillaume ◽  
YAOKOKORE-BEIBRO Kouassi Hilaire ◽  
N’GORAN Kouakou Eliézer
Keyword(s):  
Cote D'ivoire ◽  
Rainy Season ◽  
Côte D’Ivoire ◽  
Well Being ◽  
Dry Season ◽  
Resident Species ◽  
Cote D’Ivoire ◽  
South Central ◽  
Frequent Species ◽  
Côte D'ivoire

Les oiseaux rendent d’importants services écologiques nécessaires au bien-être de l’homme. En Côte d’Ivoire, l’essentiel des études ornithologiques se sont déroulées au sud, et accessoirement au centre et au centre-ouest. En outre, très peu de travaux ont porté sur les zones humides. La ville de Korhogo abrite des barrages à vocation agro-pastorale qui n’ont été l’objet d’aucune étude. Pour combler ce manque de connaissance, une étude a été menée de février 2016 à janvier 2017. L’objectif de ce travail est d’évaluer la richesse spécifique et de déterminer l’influence des saisons sur la distribution qualitative de la communauté des oiseaux du barrage urbain de Koko dans la commune de Korhogo. Pour ce faire, des observations directes, utilisant la méthode des transects ponctuée d’arrêts d’environ 15 minutes, ont été effectuées. Les résultats indiquent que cette communauté est constituée de 63 espèces d’oiseaux appartenant à 32 familles et regroupées en 14 ordres. Globalement, l’ordre des Passériformes et la famille des Ardeidae sont les mieux représentés. Du point de vue de leur statut biogéographique, les espèces résidentes (37 individus : 59 %) et accidentelles (23 individus : 36,51%) sont majoritaires. Le plus grand nombre d’espèces a été observé en saison des pluies (52 individus : 82,54%). Sept espèces ont été spécifiques de la saison sèche alors que trois espèces sont caractéristiques de la saison des pluies. Les espèces résidentes ont été les nombreuses en toute saison. Au niveau structural, les espèces accessoires, les espèces assez-fréquentes et les espèces fréquentes ont été les mieux représentées en saison sèche tandis que les espèces assez-fréquentes ont été majoritaires en saison des pluies. Cette étude confirme la distribution des communautés des oiseaux selon les saisons. ABSTRACT Birds provide important ecosystem services necessary for human well-being. In Côte d'Ivoire, ornithological studies were carried out in the south, central and central-west. In addition, very little work has been done on wetlands. The Commune of Korhogo is home to agro-pastoral dams that have not been studied. To fill in this gap of information, a study was conducted from February 2016 to January 2017. The aim of this study was to assess the specific richness and to examine the effect of seasons on the qualitative distribution of the Koko urban dam birds’ community. Direct observations using the method of line transects with a 15 minutes points were carried out. Results show that this community consists of 63 species of birds belonging to 32 families and grouped in 14 orders. Globally, the order of the Passeriformes and the family of Ardeidae were the best represented. In terms of their biogeographical status, resident species (37 individuals: 59%) and accidental species (23 individuals: 36.51%) were dominant. The high number of bird species was observed during the rainy season (52 individuals: 82.54%). Seven species were specific to the dry season while three species are characteristic of the rainy season. Resident species were numerous in all seasons. The accessory and relatively frequent species have been the most abundant during the dry season while the fairly frequent species were predominant in the rainy season. This study confirms the distribution of bird communities according to the seasons.

Assessment of Trace Elements in Bissap (Hibiscus sabdariffa) Sold in the City of Abidjan in Côte d’Ivoire

2017 ◽  
Vol 05 (03) ◽  
Author(s):  
M’boh Gervais Melaine ◽  
N guessan Ismael Gbabia Zie ◽  
Ackah Jacques Auguste Alfred Bognan ◽  
Konan Kouassi Martin ◽  
Djaman Allico Joseph
Keyword(s):  
Trace Elements ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Hibiscus Sabdariffa ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
The City

scholarly journals Vegetative Growth Response of Eggplant (Solanum aethiopicum L.) to Combined Effects of Fertilizer Types and Irrigation Regimes Applied on Littoral Tertiary Soil in Côte d’Ivoire

2019 ◽  
pp. 1-11
Author(s):  
Lekadou Tacra Thierry ◽  
Coffi Pierre-Marie Janvier ◽  
Yao Saraka Didier Martial ◽  
Ama Tamia Joséphine
Keyword(s):  
Cote D'ivoire ◽  
Drip Irrigation ◽  
Vegetative Growth ◽  
Côte D’Ivoire ◽  
Organic Manure ◽  
Irrigation Regime ◽  
Irrigation Systems ◽  
Leaf Production ◽  
Cote D’Ivoire ◽  
Côte D'ivoire

The use of manures and irrigation systems are essential ways to improve the fertility of coastline poor soils in Côte d’Ivoire and to optimize crop yields at any time of the year. The present study aims to identify the best manures and irrigation systems suitable for the vegetative growth of eggplant on the tertiary poor soils of the coast in Côte d'Ivoire. For this purpose, combinations of fertilizer (urea and organic manure from chicken droppings) and irrigation techniques (manual watering and drip irrigation system) were tested in Fisher block design. So, vegetative growth variables of Eggplant, Aub 21N / 06, grown on tertiary soil at the Marc Delorme research station of the Centre National de Recherche Agronomique (CNRA) in Southern Côte d'Ivoire were evaluated. The results showed that the growth dynamics of collar circumference, height and leaf production of eggplant irrigated by drip system and fertilized with organic manure from chicken droppings was significantly higher. The eggplants that received a treatment composed by organic or chemical manure without irrigation and those without manure and irrigation expressed lower vegetative growth. The organic manure from chicken droppings associated with the drip irrigation regime had a significant beneficial effect on the average growth rates of the collar circumference (0.0035 cm.day-1), height (0.5669 cm.day-1) and leaf production (3.12 leaves.day-1) of eggplant. It appears that organic manure from chicken droppings associated with drip irrigation regime is an agricultural innovation to disseminate to market gardeners to cultivate the eggplant on littoral tertiary soil.

scholarly journals Physico-chemical characterization of urban aerosols from specific combustion sources in West Africa at Abidjan in Côte d'Ivoire and Cotonou in Benin in the frame of the DACCIWA program

2020 ◽  
Vol 20 (9) ◽  
pp. 5327-5354 ◽  
Author(s):  
Aka Jacques Adon ◽  
Catherine Liousse ◽  
Elhadji Thierno Doumbia ◽  
Armelle Baeza-Squiban ◽  
Hélène Cachier ◽  
...  
Keyword(s):  
Organic Carbon ◽  
West Africa ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Dry Season ◽  
Water Soluble ◽  
Wet Season ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Combustion Sources

Abstract. Urban air pollution in West Africa has yet to be well characterized. In the frame of DACCIWA (Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa) program, intensive measurement campaigns were performed in Abidjan (Côte d'Ivoire) and Cotonou (Benin), in dry (January 2016 and 2017) and wet (July 2015 and 2016) seasons, at different sites chosen to be representative of African urban combustion sources, i.e., domestic fires (ADF), traffic (AT) and waste burning (AWB) sources in Abidjan and traffic source in Cotonou (CT). Both the size distribution of particulate matter (PM) and their chemical composition including elemental carbon (EC), organic carbon (OC), water-soluble organic carbon (WSOC), water-soluble inorganic ions (WSI) and trace metals were examined. Results show very high PM concentrations at all sites and a well-marked seasonality as well as a strong spatial variation. The average PM2.5 mass concentrations during the wet season are 517.3, 104.1, 90.3, and 69.1 µg m−3 at the ADF, CT, AT, and AWB sites, respectively. In the dry season, PM2.5 concentrations decrease to 375.7 µg m−3 at the ADF site, while they increase to 269.7, 141.3, and 175.3 µg m−3 at the CT, AT, and AWB sites, respectively. The annual PM2.5 levels at almost all sites are significantly higher than the WHO guideline level of 10 µg m−3. As for PM mass, (EC) and (OC) concentrations are also maximal at the ADF site, accounting for up to 69 % of the total PM mass. Such a high content is mainly linked to wood burning for domestic cooking and commercial food smoking activities. Dust contributions are dominant at CT (57 %–80 %), AT (20 %–70 %), and AWB (30 %–69 %) sites and especially in the coarse and fine-particle modes at the CT site and in the coarse fraction at the AT site, which may be explained by the impact of long-range desert-dust transport and resuspended particles from the roads, in addition to anthropogenic sources. The contributions of WSI to the total PM mass, mainly driven by chloride, nitrate, and calcium in the fine and/or large particles, are highly variable according to the sites but remain less than 30 %. Values are generally 1–3 times higher in the wet season than in the dry season. This is due not only to anthropogenic emissions but also to nitrate formation by reaction processes and natural emissions. The concentrations of trace elements reflect well the trends in dust at the traffic and AWB sites, with a predominance of Al, Na, Ca, Fe, and K, keys markers of crustal dust. This study constitutes an original database that characterizes specific African combustion sources.

scholarly journals The representativeness of the dental calculus dietary record: insights from Taï chimpanzee faecal phytoliths

2021 ◽  
Vol 13 (6) ◽  
Author(s):  
Robert C. Power ◽  
Roman M. Wittig ◽  
Jeffery R. Stone ◽  
Kornelius Kupczik ◽  
Ellen Schulz-Kornas
Keyword(s):  
Cote D'ivoire ◽  
National Park ◽  
Côte D’Ivoire ◽  
Dry Season ◽  
Dental Calculus ◽  
Cote D’Ivoire ◽  
Taï National Park ◽  
Côte D'ivoire ◽  
Dietary Records ◽  
Tai National Park

AbstractIn recent years, new applications of microremain dietary analysis using dental calculus as a source of dietary data on ancient human subsistence and behaviours have accelerated. The dental calculus of contemporary human and non-human populations with known diets have been used as reference datasets, including the chimpanzees of Taï National Park (Côte d'Ivoire), but explaining the preservation mechanism involved is challenged by our incomplete knowledge of the microremain content within the diets of these reference populations and our rudimentary information on microremain incorporation into dental calculus. Here, we analyse phytoliths in faecal samples to assess to what extent plant phytoliths of a diet are reflected in the dental calculus as well as in the egested faeces. In this study, we identify and document the faecal phytolith assemblages as an indicator of plant consumption in two Western chimpanzees of the Taï National Park (Côte d'Ivoire) before (wet season), during (dry season) and after (dry season) a dust-rich period. Moreover, observational dietary records of these two individuals were compiled to improve the interpretability of this dental calculus phytolith dataset. The faecal phytolith assemblages vary significantly across samples in terms of abundance and diversity. The most common phytolith morphotypes were eudicot plates, single-cell and multi-cell tracheids, monocot rugulose and echinate spheroids and, to a lesser extent, unspecified thick and thin elongates. High loads of grit and other micro-remains (e.g. diatoms) are found during the dry period. Using observational dietary records as a starting point and our faecal results as a terminus, we consider how dental calculus can accumulate phytoliths. Our findings enable identification of the phytolith morphotypes that are under-represented in dental calculus, which is highly informative for future dental calculus research strategies.

scholarly journals Vegetative Performance of Two Cultivars and Four Hybrids of Pineapple in Côte d’Ivoire

2021 ◽  
pp. 282-288
Author(s):  
N’guetta Adélaïde ◽  
Aby N’goran ◽  
Koffi Kouamé Cyrille Germain ◽  
Atsin Guy Joël Olivier ◽  
Traoré Siaka
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
International Market ◽  
Dry Mass ◽  
Fresh Mass ◽  
Ananas Comosus ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Significant Difference ◽  
Fresh And Dry Mass

Since the early 2000s, pineapple from Côte d’Ivoire has suffered a discount in its marketing due to the heterogeneity of the quality of its fruit and the arrival of MD2 on the international market. In order to help pineapple from Côte d'Ivoire once again win back the international market, Ananas comosus hybrids with an early natural coloring have been developed at the CNRA. The agronomic performances of these hybrids were tested at the research station of Anguédédou. Vegetative characteristics such as plant fresh mass, stem fresh and dry mass, number of leaves generated and leaf D fresh mass of these hybrids H1, H2, H3 and H4 were compared to those of cultivars Smooth Cayenne and MD2 at 2, 4 and 6 months. The results obtained showed no statistically significant difference in plant mass between hybrid H4 (2675 g) and cultivars MD2 (2645 g) and Smooth Cayenne (2763 g) after 6 months of planting. The fresh and dry mass of the stems of these three varieties were also statistically identical. Hybrid H4 leaf D fresh mass was very low (55 g) at six months of planting compared to the two cultivars (73 g each). Hybrids H2 and H3 at this same period gave leaf masses of over 80 g. Regarding the characteristics assessed, hybrids H4 and H3 had much more conformity with cultivars Smooth Cayenne and MD2.

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