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Evaluation of the Productivity of Intercropping Plantain Cultivar (PITA 3) Fertilized with Two Types of Manure, under Coconut Tree Based (Cocos nucifera L.), on the Tertiary Sands of Côte d’Ivoire

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Agricultural Sciences 2023年第10期14卷 1405-1419页

作者： Pierre-Marie Janvier Coffi Joséphine Tamia Ama Thierry Tacra Lekadou Siaka Traore charly fernand agoh Didier Martial Saraka Yao Geosciences and Environment Laboratory Environmental Sciences and Management Training and Research Unit (UFR) Nangui Abrogoua University (UNA) Abidjan C&#244te d’Ivoire Centre National de Recherche Agronomique Station de Recherche Marc DELORME Abidjan C&#244te d’Ivoire Department of Biochemistry-Genetics UFR of Biological Sciences Péléforo Gon Coulibaly University Korhogo C&#244te d’Ivoire

Pressure on land tenure is having a negative impact on the coconut sector, reducing farmers’ incomes. Intercropping cultivars plantain under coconut based has been considered as a solution to this problem. The aim of this work is to diversify the sources of income for coconut growers. The plantain variety PITA 3, popularised by the CNRA, was grown in coconut inter-rows (PB113+), with two types of manure (chemical, organic). Six (06) treatments D1, D2, D3, D4, D5 and D6 were studied. In the tenth month after planting, treatment D3, which included banana plants fertilised with 9 kg of manure/plant, got the best agromorphological performance: height (264.08 cm), neck circumference (57.68 cm) and 12 leaves. In terms of production parameters, D3 banana plants had a shorter production cycle (347 days) and the highest diet mass (9.3 kg). However, the plants that received no fertiliser (D6) showed stunted growth and were unable to produce brunch. The fertilization of plantain with 10 t/ha of laying hen droppings permitted good development and production of plantains on tertiary sands.

关键词： Intercropping Coconut Plantain PITA 3 Manure Tertiary Sands

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Impact of Climate Variability on Water Resources: The Case of Marc Delorme-Cnra Station, Southeast of Ivory Coast

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Journal of Water Resource and Protection 2021年第9期13卷 726-749页

作者： charly fernand agoh Tacra Thierry Lekadou Mahaman Bachir Saley Bi Trazié Jérémie Gala Jean Homian Danumah Pierre-Marie Janvier Coffi Zadjéhi Eric-Blanchard Koffi Bi Tié Albert Goula Laboratory of Water and Environmental Sciences and Techniques (LSTEE) UFR of Earth Sciences and Mineral Resources (STRM) Felix Houphou&euml t Boigny University Abidjan Ivory Coast National Agronomic Research Center Marc Delorme Research Station Abidjan Ivory Coast Laboratory Geosciences and Environment Training and Research Unit of Environmental Sciences and Management (UFR) of Environmental Sciences and Management Nangui Abrogoua University (UNA) Abidjan Ivory Coast Laboratory of Biology and Improvement of Plant Productions UFR Sciences de la Nature Peleforo Gon Coulibaly University Korhogo Ivory Coast

This study aims to characterize the climatic variability in the South-East of Ivory Coast and to show its impact on the supply of water resources. To do this, statistical and hydrological methods were applied to climatic data collected at the Marc DELORME Research Station of the CNRA. The statistical trend tests on this data revealed a significant decrease in precipitation and an increase in temperature, insolation and evaporation. Statistical break methods indicate a rainfall break in 1982 which marks a modification of the rainfall regime thus translating a drop in rainfall of 15%, a recession in the frequency of rainy days in general and in particular in rainfall heights between 10 and 30 mm and greater than 50 mm. This break is accompanied by a shortening of the rainy seasons, with average rainfall durations ranging from 54 days (short rainy season) to 104 days (great rainy season). Despite the disturbances in the different seasons of the year, the monthly rainfall regimes in the area have not changed. The assessment of the effects of drought on water resources using the Standardized Precipitation and Evapotranspiration Index (SPEI) for three-time scales (1 month, 3 months and 12 months) indicates a severe drought ranging from 3% to 7% over the period 1961 to 2018. However, despite the presence of this severe drought, the intensity of the drought was found to be moderate on all time scales. The Thorrnthwaite method was used to highlight the impacts of this climatic variability on the region’s water resources. The average annual recharge estimated at 402 mm, has been reduced to 153 mm during a deficit period, a decrease of about 62%. The average annual runoff, which was 294 mm, fells to 257 mm, a decrease of about 13%. This recorded decrease in the water infiltrated after the rainfall break (1983-2018), explains the heterogeneous decrease in the depth of the water table.

关键词： Climate Variability Drought Statistical Tests Water Resource Ivory Coast

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