DOI: https://doi.org/10.36347/sajb.2025.v13i12.008

Pages: 1628-1633

To improve upland rice (Oryza sativa) production in Côte d’Ivoire, where soils are increasingly depleted in essential nutrients, a study was conducted at the CNRA research station in Man. The objective was to assess the effectiveness of the organic fertiliser Green Amino on the growth and yield performance of upland rice. Two upland varieties (IDSA 10 and IDSA 85) and four fertilisation regimes were evaluated: no fertilisation; 1.25 kg/ha of Green Amino; the recommended mineral fertilisation of 200 kg/ha NPK + 100 kg/ha urea; and a combined treatment of 200 kg/ha NPK + 1.25 kg/ha Green Amino. The experiment followed a split-plot design with four replications, assigning varieties to the main plots and fertilisation regimes to the subplots. Analysis of variance revealed significant differences between varieties and between fertilisation treatments for all measured parameters, although no significant interaction was observed between the two factors. The combined application of 1.25 kg/ha Green Amino with 200 kg/ha NPK enhanced growth indicators such as tiller number, plant height, and biomass more effectively than the exclusive use of Green Amino. Growth improvements under the recommended mineral fertilisation were less pronounced than under the combined Green Amino + NPK treatment. Both the Green Amino alone and the Green Amino + NPK regimes significantly influenced paddy yield. The sole application of 1.25 kg/ha Green Amino increased paddy yield by 7% compared with unfertilised plots, while its combination with mineral fertiliser raised yields by 37%. These two regimes produced yields statistically comparable to those obtained with the recommended fertilisation. Overall, the fertilisation regimes of 1.25 kg/ha Green Amino and 1.25 kg/ha Green Amino + 200 kg/ha NPK can be recommended as effective alternatives for upland rice production.