摘要
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<sup>-1</sup>) and magnesium sulfate (0, 25, 50 and 75 kg·Mg·ha<sup>-1</sup>) and Togo natural phosphate (0, 25, 50 and 75 kg·P·ha<sup>-1</sup>) 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<sup>-1</sup> 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.
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<sup>-1</sup>) and magnesium sulfate (0, 25, 50 and 75 kg·Mg·ha<sup>-1</sup>) and Togo natural phosphate (0, 25, 50 and 75 kg·P·ha<sup>-1</sup>) 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<sup>-1</sup> 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.
作者
Guy Fernand Yao
Brahima Kone
Kouadio Amani
Franck Michaël Lemonou Bahan
Jean Lopez Essehi
Brou Kouame
François Lompo
Albert Yao-Kouame
Guy Fernand Yao;Brahima Kone;Kouadio Amani;Franck Michaël Lemonou Bahan;Jean Lopez Essehi;Brou Kouame;François Lompo;Albert Yao-Kouame(National Center for Agronomic Research (CNRA), Central Laboratory, Soils, Water and Plants (LCSEP), Sustainable Soil and Water Management Program, Bouaké, Cô,te d’Ivoire;Soil, Water and Geomaterials Sciences Laboratory (LS2EG), Earth Sciences and Mining Resources Training and Research Unit (UFR STRM), Félix Houphouë,t-Boigny University, Abidjan, Cô,te d’Ivoire;National Center for Agronomic Research (CNRA), Man Research Station, Rice Program, Man, Cô,te d’Ivoire;Environment and Agricultural Research Institute (INERA), Ouagadougou, Burkina Faso)
