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Abstract
An on-farm study was conducted during July 2002 to February 2003 under EC funded POND LIVE project to compare two major existing integrated pond-dike production systems in Mymensingh area of Bangladesh. Three farmers practising carp polyculture managed as low input system and other three practising pangas monoculture managed as high input system were selected from two neighbouring villages, Noshirpur and Bashati of Muktagacha Upazilla under Mymensingh district. The input-output of both categories of farming systems were computed in terms of biomass (Kg/ha), money value (Cash and non-cash Taka/ha) and nutrient (Kg Nitrogen/ha). In low input system averages of pond and dike inputs were 9,235 Kg/ha and 6,553 Kg/ha, respectively with the averages of outputs of the same were 1,526 Kg/ha and 7,788 Kg/ha, respectively. Whereas, in case of high input system the averages of pond and dike inputs were 72,818 Kg/ha and 7,135 Kg/ha, respectively with the averages outputs of the same were 32,460 Kg/ha and 6,971 Kg/ha, respectively. These pond dike inputs and outputs were converted into cash Taka as well as non-cash Taka. The averages of pond inputs in Kg N were 74 Kg N/ha in low input system and 2,025 Kg N/ha in high input system. The averages of pond outputs in Kg N in low and high input systems were 36 Kg N/ha and 690 Kg N/ha, respectively. Significant difference (P < 0.001) was found between Pond inputs in Kg biomass and Kg N of low input system and high input system. Pond outputs in Kg biomass, cash Taka and Kg N of low and high input systems were also significantly different.