Comparative Study of the Productivity and Some Economical Aspects of the Conventional Rice and Rice-Fish Farmings Systems in Agonlin-Lowé Village, Adjohoun, Bénin

The main idea of this work was to compare the productivities of rice farming systems and rice rice- fish polyculture in the same fish ponds. The experiment was conducted in six (06) different compartments with a total area of 300 m² between March and August 2022. The test was carried out with 600 fry including 400 fingerlings of Oreochromis niloticus and seedlings of rice (Variety IR 841). The initial average weights of fish in rice-fish culture without food supply and with food supply were respectively 9.7 g and 9.8 g. After 72 days, the variations of the physico-chemical parameters showed no significant difference between the compartments. In rice-fish farming, in the compartments without food supply, the average yield was 2.17 t/ha and in the compartments with food supply this average was 2.33 t/ha against 2.04 t/ha in the rice fields. In the associated culture, food intake was favorable with a mass gain of 6.9 g compared to 1.4 g obtained in the second pound. Also, the rice yields and the growth performance of fish O. niloticus were significantly (p > 0.05) higher than those obtained in conventional rice cultivation. Also monitoring the growth of farmed fish must continue in order to assess the performance achieved as well as the financial benefits for good promotion of the sector.