Effects of Natural Organic and Mineral Fertilizers on the Growth and Productivity of Cabbage (Brassica oleracea) in Daloa Commune, West-central Côte d'ivoire

Abstract

The aim of the study was to evaluate the effect of natural organic fertilizers (Azolla caroliniana and compost) and mineral fertilizers (NPK 15-15-15) on growth and production parameters of cabbage, variety Fortune F1. The experiment was conducted at the University of Daloa, on a 210m2 plot in a three-block Fisher design with four treatments (Control, NPK, aqueous extract of Azolla and compost). Growth and production parameters were measured every 10 days after transplanting and analyzed using STATISTICA7.1 software. Results showed improved cabbage growth, with good evolution of leaf area, number of leaves, span, height and collar diameter of seedlings transplanted with Azolla caroliniana aqueous extract. Yield (14.7t/ha) and cabbage head diameter (44.13+5.86cm) were obtained with NPK, while Azolla caroliniana liquid indicated (17.33t/ha) and (46.69+8.68cm), respectively, compared with the other treatments (control and compost). In conclusion, the aqueous extract of Azolla was found to be the best performer for improving cabbage productivity in the study area. It can be recommended as a natural organic fertilizer.