Growth and yield of GIFT (Oreochromis niloticus) and Thai silver barb (Barbodes gonionotus Bleeker) in rice fields and their effects on the yield of rice
2001
Uddin, M.J. | Dewan, S. | Ashrafuzzaman, M | Haque, M.M.
(GIFT) (Oreochromis niloticus) and Silver barb (Barbodes gonionotus) in rice fields and theireffects on the yield of rice was carried out in nine experimental rice plots. Threetreatments viz., treatment-1 with 0. niloticus (T1), treatment-2 with B. gonionotus (T2) andtreatment- 3 was kept as control (T3, without fish) were used in this study. Fertilizerssuch as, Urea (178 kg ha-1), T.S.P (125 kg ha-1) and M.P. (67 kg ha-1) were applied in eachtreatment. The fishes were stocked @ 6250 ha·1 and the experiment was continued for aperiod of 107 days.The values of water quality parameters such as, water temperature, dissolved oxygen,pH and chlorophyll-a were found within suitable level. Between the two species, higherspecific growth rate was recorded in 0. niloticus than that of B. gonionotus. But B.gonionotus showed much higher survival (72%) than that of 0. niloticus (35%). Similar tosurvival, higher production (244 kg ha-1) and income (Tk. 6399 ha-1) were recorded in B.gonionotus than those of 0. niloticus (142.8 kg ha'1 and Tk. 2137 ha-1). Significantdifferences (p<O.Ol) in the yield of rice grain and straw were observed between thetreatments with fish and without fish.
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