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Comparative Study of the Physicochemical Quality of the Waters of the Méné River(Sassandra Watershed, Ivory Coast) in the Dry Season and in the Rainy Season

Open Journal of Stomatology（口腔学期刊） 2024年第7期 341页

作者： Bakary Ouattara Camille Assouan Laurent Boka Koffi konan René Kouakou Ake Lucien Jonathan Yapo Annick Zoglo-Brou Ahi Morel Mounin Chapo Affoué Linda Marie Pierre Koffi Kahder Morel Diarra Atse Kobo n’guessan konan Marc Koffi

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Sprinkler Irrigation and Soil Tillage Practices in Sugarcane Plantations as Influenced by Soil Texture and Water Storage in northern Ivory Coast

Journal of Environmental Protection（环境保护） 2024年第6期 738页

作者： konan Lopez Kouamé Gansso Valentin Akilinon olivier Simon Mananga Kombo Gneneyougo Emile Soro Bi Tié Albert Goula

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Journal of Life Sciences 2013年第3期7卷 293-301页

作者： Crepin B. Pene, Souleymane n'Diaye Chantal n'guessan-konan Department of R&D SUCAFCI/SOMDIAA Sugar Mills 33 rue des Brasseurs O1 P.O. Box 1967 Abidjan 01 Ivory Coast

Soil survey investigations were carried out in Ferk6 1 as well as Ferk6 2 sugar mills of northern Ivory Coast to determine soil texture and water storage capacity for sprinkler irrigation and tillage management. A 5-year term observation experiment on reduced tillage compared with conventional tillage was also conducted in Ferk6 1 over an irrigated cane crop of 28 ha for yield optimization purpose. Soil sampling was achieved after harvest or prior to re-plantation at five different spots along two transects over 30 cm depth in every farmland which covers about 30-40 ha with 432 m long cane rows as to get an average soil sample of 1.5-2 kg. Soil physical properties like texture and water retention curves were determined locally in the sugar company＇s soil laboratory. It came out that the majority of soils investigated was coarse-textured for about 64% in Ferk6 1 and 85% in Ferk6 2, with a lower to medium water storage capacity （70-89 mm） over 60 cm depth which corresponds to a readily available moisture less than 60 mm. Except for the sugarcane plant crop, no significant difference in cane yields resulting from tillage practices was observed over four consecutive cropping seasons. The yield decline from plant cane to first ratoon was very high under conventional tillage （-16 t/ha） compared with the reduced tillage （＋3 t/ha）. Even higher cane yield was obtained on the second ratoon （89 t/ha） compared with the conventional tillage （83 t/ha）.

关键词： Particle size distribution physical property water retention available moisture reduced tillage irrigation management.

Influence of the Year and Growing Area on Maize (Zea mays L.) Production in the Central and north-Central Zones of Côte d’Ivoire (Departments of Bouake and Katiola)

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American Journal of Plant Sciences 2022年第8期13卷 1116-1125页

作者： Essy konan Jean François Kouassi n’dri Jacob Kouame n’guessan Kouadio Yatty Justin Agricultural Production Improvement Laboratory UFR Agroforestry University of Jean Lorougnon GUEDE (UJLoG) Daloa C&#244 te d’Ivoire

Several studies conducted in recent years in Côte d’Ivoire reveal that agriculture is increasingly affected by the adverse effects of climate variability. The present study aims at evaluating the effect of the zone and the year of cultivation on the productivity of maize in the Central and north-Central zones of Cote d’Ivoire. It was carried out for two years (2020 and 2021). The experimental design used was a completely randomized block design with three replications. Observations were made on 12 agronomic parameters (plant size, internode size, collar diameter, number of leaves, number of internodes, cob insertion level, cob length, cob diameter, total kernels, cob dry weight, kernel dry weight, yield). The results showed that all agronomic traits of maize were significantly influenced by locality, except for the number of leaves. The highest values of the traits were observed in the locality of Bouaké. However, the year of cultivation did not influence the agronomic parameters of maize. This study will help to avoid yield decreases due to rainfall disturbances as a consequence of climate change.

关键词： Climate Variability Agronomic Parameters Growing Area

Preliminary Study of Predation Effectiveness of the Assassin Bug Rhynocoris rapax Stal (Heteroptra: Reduviidae) on Fall Armyworm Spodoptera frugiperda Smith (Lepidoptera: noctuidae), a Major Pest of Maize Crops

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Advances in Entomology 2023年第1期11卷 10-17页

作者： Assiénin Hauverset n’guessan Brice Sidoine Essis Achi Laurent n’cho Hugues Annicet n’da Kouamé Jean-noël konan n’guessan Alphonse Kouassi national Centre for Agronomy Research Research Station of La Mé Laboratory of Entomology Abidjan C&ocirc te d’Ivoire national Centre for Agronomy Research Food Crops Research Station Laboratory of Phytopathology Bouaké C&ocirc te d’Ivoire national Centre for Agronomy Research Research Station of Maize Millet and Sorghum Laboratory of Phytopathology Ferkessédougou C&ocirc te d’Ivoire national Centre for Agronomy Research Research Station of Maize Millet and Sorghum Plant Breeding Laboratory Ferkessédougou C&ocirc te d’Ivoire national Centre for Agronomy Research Research Station of La Mé Plant Breeding Laboratory Abidjan C&ocirc te d’Ivoire national Centre for Agronomy Research Research Station of La Mé Soil Science Laboratory Abidjan C&ocirc te d’Ivoire

Maize is a staple food in many sub-Saharan African countries, grown on large surfaces and with high production. However, maize’s cultivation is often confronted with attacks by the fall armyworm, which considerably reduces production. Thus, the use of biological agents in the control of the fall armyworm would contribute effectively to the sustainability of agriculture. It is in this context that this study, conducted at the La Mé station of the national Centre for Agronomy Research, aims to test the effectiveness of Rhynocoris rapax, a powerful predator of various insect families, on the fall armyworm Spodoptera frugiperda, for biological control of this maize pest in Côte d’Ivoire. Therefore, 3 batches of 1 adult individuals of Rhynocoris rapax were captured in trial plots set up at the La Mé station. These individuals were then put in contact with 3 batches of 5, 20 and 40 larvae of the pest in rearing boxes at an average temperature of 26.4°C and an average relative humidity of 60%, in order to evaluate the efficiency of the predation. The results showed that Rhynocoris rapax kills more larvae when these are in large numbers. The mortality of the high number of larvae was observed during the first three days, probably due to the voracity and aggressiveness of Rhynocoris rapax that period. So R. rapax is a potential predator of fall armyworm and should be protected.

关键词： Effectiveness Predation Rhynocoris rapax Spodoptera frugiperda Maize

Estimation of the Actual Evapotranspiration by the SEBAL Method in the Irrigated Rice Perimeter of Zatta (Yamoussoukro—Côte d’Ivoire)

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Journal of Water Resource and Protection 2023年第10期15卷 539-556页

作者： Junias Léandre Kra Moïse Botou Adahi Brice Arthur konan-Waidhet Jean-Yves konan n’guessan Joël Doyéré Koné Emmanuel nogbou Assidjo Department of Geosciences and Environment Université Jean Lorougnon Guédé (UJLoG) Daloa C&ocircte d’Ivoire Department of Rural Engineering and Geographical Sciences Institut National Polytechnique Félix Houphou&eumlt-Boigny (INP-HB) Yamoussoukro C&ocircte d’Ivoire Department of Chemical and Food Engineering Institut National Polytechnique Félix Houphou&eumlt-Boigny (INP-HB) Yamoussoukro C&ocircte d’Ivoire

In this study, the SEBAL (Surface Energy Balance Algorithm for Land) model was used to map the spatio-temporal distribution of actual evapotranspiration in the Yamoussoukro department (Côte d’Ivoire). Like other regions of the country, the Yamoussoukro district is confronted with the phenomenon of evapotranspiration (ET). This is a very important component that comes into play in the water balance but also in the calculation of the water needs of agricultural crops. Consequently, its estimation is of paramount importance in research related to the rational management of water resources, particularly agricultural water. The objective of this study was to analyze the spatio-temporal distribution of actual evapotranspiration (AET) as a function of land cover and land use. The methodology used is based on the SEBAL model which uses remote sensing (Landsat 8_OLI/TIRS) and climatic data to estimate actual evapotranspiration and analyze the spatio-temporal distribution of AET. The results reveal that the AET varied from 0 to 5.44 mm/day over the period from December 2019 to February 2020 with an average value of 4.92 mm/day. The highest average values occurred for water bodies (4.90 mm/day) and flooded vegetation (4.88 mm/day) while the lowest values occurred in residential areas (2.04 mm/day). Furthermore, the results show that the difference between the SEBAL model and the FAO-Penman-Monteith method is minimal with an average RMSE of 0.36 mm/day for all the satellite images. This study demonstrates the considerable potential of remote sensing for the characterization and estimation of spatial evapotranspiration in the Zatta irrigated rice-growing area.

关键词： Evapotranspiration Water Balance Rational Management Remote Sensing SEBAL Model

Influence of Mineral Fertilization on the Capacity of nodulation of Three Species of Legumes(Groundnut,Cowpea and Soybean)

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American Journal of Plant Sciences 2019年第12期10卷 2208-2218页

作者： Kouassi n’dri Jacob Kouame n’guessan Alui konan Alphonse Yao Koffi Joel Ayolie Koutoua Yatty Kouadio Justin Laboratory of Improvement of Agricultural Production University Jean Lorougnon GUEDEAgroforestry UFRDaloaCote d’Ivoire Geosciences Department University Péléforo Gbon CoulibalyBiological SciencesUFRKorhogoCote d’Ivoire

Groundnut (Arachis hypogaea), cowpea (Vigna unguiculata) and soybean (Vigna radiata) are the main food legumes grown in Cote d’Ivoire and the localities of Haut-Sassandra. These legumes are highly valued for their nutritional, agronomic and economic value. Groundnut, cowpea and soybean are the main food legumes grown in Cote d’Ivoire and in the localities of Haut-Sassandra. On the other hand, Ivorian soils are characterized by a tendency towards acidification and a decrease in the content of nutrients such as phosphorus and nitrogen which have a direct impact on the products. To restore soil fertility, farmers use mineral fertilization. However, this fertilization has an influence on the nodulation of these legumes. The study took place at Jean Lorougnon University. We adopted a completely random experimental block device. The parameters measured included the number of nodules, the length and weight of the plant, the length and weight of the root system. Our results showed that mineral fertilization reduced the nodulation capacity of legumes. However, a small dose of phosphorus ( g) would be required for early growing legumes.

关键词： Mineral Fertilization Legumes nodulation Phosphorus

Repair of Complex Post-Traumatic Facial Dislocations: Indications, Therapeutic Difficulties and Results at Treichville University Hospital, Abidjan, Cote d’Ivoire

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Open Journal of Stomatology 2022年第11期12卷 337-345页

作者： A. M. R. E. Anzouan-Kacou Christophe konan Allah Romaric Evrard Assi Yapo Eric Kouassi Zegbeh n’guessan Kouadio Emmanuel konan Department of Maxillofacial Surgery and Stomatology Treichville University Hospital Abidjan Cote d’Ivoire Department of Reconstructive and Aesthetic Plastic Surgery Hand Surgery and Burns Treichville University Hospital Abidjan Cote d’Ivoire Department of Stomatology and Maxillo-Facial Surgery University of Bouaké Health Centre Bouaké Cote d’Ivoire

Introduction: Complex post-traumatic facial disfigurements are caused by civilian or ballistic trauma. Their repercussions are functional, aesthetic and psychological. The initial emergency or secondary management of facial damage is difficult. The objective is to report, through the clinical observation of three patients, the results of the management of complex facial dislocations in a context of limited technical resources. Patients and methods: Three complex post-traumatic facial dislocations were managed between May 2006 and June 2017. Results: Primary treatment and secondary repair were established on a case-by-case basis. Local autoplasty was the indication of choice. Multidisciplinary management resulted in satisfactory functional and cosmetic outcomes. Two of the patients were lost to follow-up before the end of treatment. Discussion: The complete management of facial dislocations remains difficult and complex, in an extreme exercise situation. In an emergency, the priority is to save the life of the injured person. Several factors are involved in the therapeutic decision: the choice of the maxillofacial reconstruction technique, the availability of the technical platform, the financial capacity and the psychological state of the patient and his entourage. Sequential and multidisciplinary treatment gives satisfactory results in terms of morphology, function and aesthetics, despite the limited technical resources available. Psychological support is an essential complement for successful socio-professional and family reintegration.

关键词： Dislocation Face Complex Difficulties Treatment

Study of Varietal Influence Post Conservation on Biochemical and Sensory Qualities of Attiékéand Boiled Cassava (Manihot esculenta Crantz)

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Agricultural Sciences 2016年第3期7卷 127-136页

作者： Pierre Martial Thierry Akely Yves Djina Brou Roger konan Kady Irie Lucien Patrice Kouame n’guessan Georges Amani Laboratoire de Biochimie Alimentaire Technologie de Produits Tropicaux UFR STA UNA Abidjan Cote d’Ivoire Section Sciences de la vie et de la Terre Sciences et Technologie ENS Abidjan Cote d’Ivoire Laboratoire d’Enzymologie et Catalyse Enzymatique UFR STA UNA Abidjan Cote d’Ivoire

Cassava root is shortly preserved after harvesting due to its tanning and rapid physiological decomposition. Consequently, the commercial value is reduced and the craving of its finishes products. With an aim of improving physiological quality, post harvest food value “the effects of bleaching and conservation in silo-pits were evaluated. Four (04) varieties of cassava: Bocou1, Bocou2, Bocou3 and Yavo were collected fresh and healthy in 13 months of maturity. They were subjected to a bleaching (65°C /15 - 30 s) followed by a kinetic conservation (7 days of intervals) in silo-pit (1 × 0.6 × 0.5 m). Results show that Bocou2 variety has the high proteins content (2.64% ± 0.01%), followed by hydrocyanic acid (8.21 ± 0.01 mg/100 g) and total carotenoids (26.7 μg/100 g). The conservation influences positively the protein content, reducing sugars content, the dries matter content and the total phenolic compounds for all the varieties excluded Bocou2 variety whose protein content drops. As regard of the fat contents, a weak increase is observed. The sensory analysis reveals that the boiled cassava of the Yavo variety is more appreciated followed by Bocou1 variety. Concerning the Attiéké, Bocou3 variety gives the more appreciated dish followed by the Yavo variety. In conclusion, the silo-pit conservation after bleaching improves the physiological quality of the cassava and the sensory taste even during 14 days. This study has a huge impact of reducing the post harvests losses and increases the commercial value of cassava in the world.

关键词： Cassava Atttieke Boiled Post Conservation Silo-Pit Case Sensory Quality

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石油中不同环数芳烃化合物的精细分离和制备

石油实验地质 2021年第3期43卷 524-531页

作者：刘雪李美俊唐友军何大祥 konan n’guessan Francois De Sales 师生宝朱雷长江大学油气资源与勘探技术教育部重点实验室武汉430100 长江大学资源与环境学院武汉430100 中国石油大学(北京)油气资源与勘探国家重点实验室北京102249 中国石油大学(北京)地球科学学院北京102249

石油族组分的分离和制备过程是后续分子组成、同位素分析的基础。由于同分异构体多,传统技术制备的芳烃化合物组分仍然无法满足单体化合物的同位素分析要求。采用两种不同的分离方案对原油中的多环芳烃进行精细的分离和制备,其中"一步法... 详细信息

石油族组分的分离和制备过程是后续分子组成、同位素分析的基础。由于同分异构体多,传统技术制备的芳烃化合物组分仍然无法满足单体化合物的同位素分析要求。采用两种不同的分离方案对原油中的多环芳烃进行精细的分离和制备,其中"一步法"是直接将脱沥青质的原油样品经过一次氧化铝/硅胶层析柱,用不同体积比的石油醚/二氯甲烷混合溶剂进行洗脱;"两步法"先将原油采用常规的族组分分离方法得到芳烃馏分,再将芳烃馏分经氧化铝层析柱,用不同比例的石油醚/二氯甲烷混合溶剂进行洗脱,可得到不同环数芳烃的组分。对洗脱出来的不同组分进行色谱—质谱分析(GC-MS),与"一步法"相比,"两步法"可以更好地实现单环、双环与三环芳烃化合物的分离制备,其中,石油醚/二氯甲烷(99/1,V/V)的混合溶剂可以制备单环芳烃化合物;石油醚/二氯甲烷(9/1,V/V)混合溶剂可制备得到以双环芳烃化合物占绝对优势的组分;石油醚/二氯甲烷(8/2,V/V)混合溶剂则可制备得到三环芳烃化合物组分。

关键词：石油柱层析分离多环芳烃