Effect of NPK (15-15-15) on the production of Guinea sorrel ecotypes (Hibiscus sabdariffa L.) in Niger

Guinea sorrel (Hibiscus sabdariffa L.) is an important crop because of its leaves, calyxes and seeds which play a considerable socio-economic role for the people of the Sahel. The main objective of these experiments is to evaluate the effect of mineral fertilization of NPK (15-15-15), in order to determine the optimal dose for calyx, leaf and seed production of guinea sorrel. . They were taken to Tara/Gaya (11°53'N and 3°19'E) and to Tarna/Maradi (13°27'N and 7°06'E) during the rainy season 2017. The device experiment used in this experiment was a four (4) replicate randomized block split plot with ecotypes in main plots and apex sections in secondary plots. The results obtained showed that the addition of NPK increased the yields of leaves, calyxes and seeds in both Tara and Tarna. This increase was around 15% in Tara, compared to 30% in Tarna. The optimal dose of NPK (15-15-15) for better improvement of Guinea sorrel production is 25 kgha^-1. We hope that studies should be continued in other climatic zones of Niger to better confirm the effect of mineral fertilization on the yield of guinea sorrel.

Keywords: Guinea sorrel, leaves, calyxes, seeds, yield, NPK, Niger