Use of ditch-dike systems in low laying area to improve Livelihood of farmars of Bangladesh

Abstract

Abstract : The people living in low lying areas in the southern part of Bangladesh are vulnerable due to repeated water-logging over the last 10 years. The application of pond-dike system in flood-prone low-lying areas may be a high potential for improving livelihoods of poor households. In this purpose, an experiment was conducted to evaluate the growth performance and production of different fish species in monoculture (tilapia and shing) and polyculture (rohu, catla, silver carp, pangus, and grass carp) systems using commercial fish feeds to determine a profitable fish culture techftique in pond-dike system in low lying area. The fish production in polyculture system was 7.4 t/ha/120 days. The production of tilapia and shing in monoculture system was 9.9 t/ha/120 days and 2.0 t/ha/120 days, respectively. Overall yield of tilapia was significantly higher (p<0.05) than that of polyculture and monoculture of shing. The result indicated on the basis of benefit-cost-ratio (BCR) that gross margin was significantly higher (p<0.05) in tilapia monoculture than that in polyculture and monoculture of shing.