Author(s)

Guy Fernand Yao¹, Brahima Kone², Kouadio Amani¹, Franck Michaël Lemonou Bahan³, Jean Lopez Essehi¹, Brou Kouame¹, François Lompo⁴, Albert Yao-Kouame²

¹National Center for Agronomic Research (CNRA), Central Laboratory, Soils, Water and Plants (LCSEP), Sustainable Soil and Water Management Program, Bouaké, Côte d’Ivoire.
²Soil, Water and Geomaterials Sciences Laboratory (LS2EG), Earth Sciences and Mining Resources Training and Research Unit (UFR STRM), Félix Houphouët-Boigny University, Abidjan, Côte d’Ivoire.
³National Center for Agronomic Research (CNRA), Man Research Station, Rice Program, Man, Côte d’Ivoire.
⁴Environment and Agricultural Research Institute (INERA), Ouagadougou, Burkina Faso.

Phosphorus bioavailability has long been a recurring problem in tropical acid soils. A pot experiment was carried out during three (3) successive rice production cycles at Adiopodoumé to evaluate the response of the NERICA 5 rice accession to various doses of calcium, magnesium and phosphorous. The experiment was conducted using a randomized split-plot design. The interactive effects of calcium carbonate (0, 25, 50 and 75 kg·Ca·ha^-1) and magnesium sulfate (0, 25, 50 and 75 kg·Mg·ha^-1) and Togo natural phosphate (0, 25, 50 and 75 kg·P·ha^-1) were determined at each production cycle. The results showed that single-dose natural phosphate supplementation for three cropping cycles resulted in an average enrichment of around 2 mg·P·kg^-1 after each trial following its continuous dissolution, with an increase in DSP (33.31% to 70.52%). The study revealed one strategy for managing and enhancing native P with cations and another for exogenous P: there would be a synergy of Ca/Mg on native P, whereas an antagonism would characterize the two parameters in phosphate fertilization.

Soil Acidity, Native and Exogenous Phosphorus, Free Iron, Ca/Mg Balances, Rice Growing, Côte d’Ivoire

Yao, G. , Kone, B. , Amani, K. , Bahan, F. , Essehi, J. , Kouame, B. , Lompo, F. and Yao-Kouame, A. (2024) Effects of Calcium and Magnesium on Phosphorus Availability in Ferralsols and Rice Production in Forest Zones of Côte d’Ivoire. Journal of Agricultural Chemistry and Environment, 13, 33-53. doi: 10.4236/jacen.2024.131003.