Mineral Fertilizers from Soil Diagnosis Reduce the Decomposition Time of Cocoa Leaf Litter in the South-Western of Cote d'ivoire

A study on soil mineral fertilization was carried out over three years in three cocoa farms in the Nawa region of south-western Côte d'Ivoire. The aim of this study was to evaluate the effects of mineral fertilizers on the decomposition time of cocoa leaf litter. The experimental design was Fisher block with four treatments (T0, T1, T2, T3) repeated three times. The treatments were for T0, the control without fertilizer, for T1, NPK fertilizer 0-23-19, for T2, NPK fertilizer 0-15-15 + 17 CaO + 5 MgO + 1 B2O3 + 0.5 Zn and for T3, NPK fertilizer 4-10-10 + 19 CaO + 4 MgO + 0.8 B2O3 + 0.3 Zn. In each treatment, 3 plots of 1 m2 were delimited with a 1 cm2 mesh wire grid. The rate of decomposition of the cocoa leaf litter was made by measuring twice a year the weight loss of the ground litter contained in the plots. Comparison of the average decomposition rates between treatments showed that the fertilized soils had the best rates during the first 6 and 12 months of the trial. In Soubré, the T2 treatment (24.6±0.6%) in the 6th month and the T1 (72.6±6.6), T2 (82.4±1.6) and T3 (78.8±4.0%) treatments in the 12th month had the best decomposition rates. At Divo, treatment T1 (38.8±0.5%) in month 6 and treatments T1 (57.8±1.7%), T2 (67.9±10%) and T3 (66.9±7.7%) in month 12 were the best. At Méagui, decay rates did not differ between treatments throughout the trial. The application of mineral fertilizers resulting from soil diagnosis reduced the decomposition time of the cocoa leaf litter.

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Effect of the Organic and NPK Fertilizers on the Growth and Yield of Sweet Potato (Ipomoea batatas (L) Lam) in the Centre of Côte d’Ivoire

Asian Journal of Soil Science and Plant Nutrition ◽

10.9734/ajsspn/2019/v4i330047 ◽

2019 ◽

pp. 1-14

Author(s):

Bakayoko Sidiky ◽

Konate Zoumana ◽

Dibi Konan Evrard Brice ◽

Kouassi Jean Hugues Martial

Keyword(s):

Sweet Potato ◽

Cote D'ivoire ◽

Ipomoea Batatas ◽

Côte D’Ivoire ◽

Poultry Manure ◽

Chemical Fertilizer ◽

Mineral Fertilizers ◽

Npk Fertilizers ◽

Cote D’Ivoire ◽

Côte D'ivoire

In Côte d’Ivoire, the sweet potato is little cultivated but stays however a culture of pension and a food mattering in certain regions. This study was conducted to assess the effect of the application of mineral (NPK 15-15-15, NPK 12-22-22) and organic (poultry manure) fertilizers on yield components of sweet potato (Ipomoea batatas (L) Lam). The experiment was conducted over two years (2016 to 2017) in experimental station of National Center of Agronomic Research (CNRA) of Bouaké in the centre of Côte d'Ivoire. The experiment was conducted following a split plot with 2 factors (variety and fertilizers) and 3 replicates. The main factor was variety with 2 levels (variety Irene and variety TIB-440060) and the subplot was fertilizers application consisted 13 levels (200, 300, 400, 500 kg ha-1 of NPK fertilizers combined 5, 10, 15 t ha-1 of organic fertilizer). Thirteen treatments based on poultry manure (T6, T7), chemical fertilizer NPK 15 15 15 (T1, T3, T4, T5) and NPK 12 22 22 (T8, T10, T11, T12) and their combination (T2 and T9) were tested. The experimental results revealed that that the effects of chemical fertilizer treatments, manure and their combination with mineral fertilizers did not influence the measured parameters. The results also showed that fertilizers improved all the agronomic parameters of sweet potato compared to the control treatment during two years of experiment. However, the Irene variety with a mean weight of 180 g tuberous roots was significantly different from the TIB variety with a mean weight of 138.73 g. In the conditions of our study and over the two-year period, producers of sweet potatoes would benefit from using organic fertilizers with the Irene variety.

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Use of Vermicompost in the Control of Rhizoctonia sp: Impact on Tomato (Solanum lycopersicum L) Production

Asian Journal of Advances in Agricultural Research ◽

10.9734/ajaar/2021/v17i230191 ◽

2021 ◽

pp. 11-21

Author(s):

Abobi Akré Hebert Damien ◽

Guei Arnauth Martinez ◽

Zro Bi Gohi Ferdinand ◽

Dale Dalé Jonathan

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Crop Yields ◽

Block Design ◽

Mineral Fertilizers ◽

Vegetable Production ◽

Tomato Crop ◽

Cote D’Ivoire ◽

Tomato Plants ◽

Côte D'ivoire

The area planted for vegetable production is increasing in Côte d'Ivoire while crop yields are decreasing due to low soil fertility, poor application of mineral fertilizers and poor plant development due to pest pressure. The trial carried out at the experimental site of the University Jean Lorougnon Guédé of Daloa, Central-Western Côte d'Ivoire, aims at evaluating the potential of vermicompost to reduce the attacks of the Rhizoctonia sp fungus on the tomato crop and increase its production. The trial was carried out using the Fischer randomized block design where four treatments were repeated four times. Four substrates, composed of mixtures of soils and doses of vermicompost (0, 20, 40 and 60 t/ha), inoculated with the fungus, were used for the cultivation of tomato in pots. Agronomic and phytosanitary parameters were evaluated on tomato plants at the end of the trial. The results showed that the production increased with the addition of vermicompost and this, the higher the dose of vermicompost added. The health of tomato plants was also improved by the reduction of Rhizoctonia sp attacks, especially with the 60t/ha dose, for which the disease severity and incidence indices were the lowest, 15% and 14%, respectively, against 41% and 38% obtained with the control. Vermicompost could be used to control fungal diseases of tomato and improve its production.

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Short-term changes in the structure of ant assemblages in a Guinean savanna under differing fire regimes at Lamto Scientific Reserve, Côte d'Ivoire

Journal of Tropical Ecology ◽

10.1017/s0266467418000305 ◽

2018 ◽

Vol 34 (5) ◽

pp. 326-335

Author(s):

Mouhamadou Kone ◽

Kanvaly Dosso ◽

Christine Dakele Yode ◽

Akissi Evelyne Kouakou ◽

Aya Brigitte N'dri ◽

...

Keyword(s):

Leaf Litter ◽

Cote D'ivoire ◽

Côte D’Ivoire ◽

Fire Regimes ◽

Habitat Modification ◽

Cote D’Ivoire ◽

Ant Assemblages ◽

Côte D'ivoire ◽

The Impact ◽

Seasonal Fires

Abstract:To maintain savanna vegetation, mid-seasonal fire has been applied since 1961 in the Lamto Savanna (Côte d'Ivoire). However, this prescribed fire has not impeded tree encroachment during recent years, nor have its effects on insect assemblages been documented. Also the impact of tree intrusion on insect assemblages is poorly studied in savanna. To prevent tree density increasing, a change in fire regime might be a solution. In this study, we examined the effect of different fire regimes (early, mid-seasonal and late fires) on leaf-litter ant assemblages in order to suggest appropriate measures for preventing tree invasion without having an effect on insect communities. Sampling was implemented by combining pitfall trapping and leaf-litter sampling before and after three different fire regimes, early, mid-seasonal and late fires. While the ant species richness declined after the passage of early and mid-seasonal fires, significantly more species were found in the burnt savanna after the late fire. However, the losses or gains of species due to different fire regimes did not cause severe changes in the ant species composition. Of the functional groups identified, only the generalists and specialist predators were respectively strongly affected by the early and mid-seasonal fires, certainly due to micro-habitat modification. Based on the trends observed in the present study, we suggest sampling other invertebrate fauna in similar savanna plots to find out if other insect groups have similar reactions to the applied fire regimes.

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