Effects of organo-mineral fertilisers on soil chemical parameters and on the rice yields (oryza glaberrimasteud) under irrigated conditions in the south sudanian zone of Burkina Faso

About 53% of rice production in Burkina Faso comes from irrigated rice cultivation. However, national average paddy yields remain low, due mainly to inherient soils fertility conditions of rice soils. The current study was initiated to solve low rice land soils fertility issues and was conducted on the irrigate rice land of the southern Sudanese zone of Burkina Faso. The objective was to evaluate the effects of four fertilization options on soil chemistry properties and rice paddy yield (during the dry season of year 2022-2023. A Fisher block experimental design was set up, with five treatments in four replicates: (T1) Control without fertilization, (T2) Compost + Urea recommended, (T3) Compost + NPK + Urea recommended, (T4) NPK + Super granulated Urea and (T5) NPK + Urea recommended. During this study, soil chemistry, rice agro-morphological and yield parameters were assessed. The results show significant difference between treatments for K and P avaiable. Treatments T2 to T5 show also significant effect on the growth and development of rice plants. The best paddy yield (5544 kg/ha) was obtained with treatment T2 ("compost + Urea recommended)" compared to the other treatments and the control showed the lowest low paddy yield (1848 kg/ha). The current study should be repeated to also assess the short and medium term effects on soils and rice yield productivity.