Performance of Amblypharyngodon mola with Barbodesgonionotus, Cyprinus carpio and Macrobrachium rosenbergii inrice-fish culture system
2008
An experiment was conducted to assess the performance of mola (Amblyphmyngodon
mola) in rice fish culture system with freshwater prawn Macrobrachium rosenbergii), Thai
silver barb (Bm·bades ganianotus) and common carp (Cyprinus cmpia) for a period of 4
months at the Agronomy Field Laboratory, Bangladesh Agricultural University,
Mymensingh, Bangladesh. Four treatments viz., treatment-I (T1) with A. mala and M.
rosenbergii; treatmen t-II (T2) with A. mala, M. rosenbergii and B. gonianatus ; treatmentIII
(T3) with A. mala, 1Vf. rosenbergii and C. cmpia, and treatment- IV (T4) as control
(without fish) were used in triplicate. All treatments were equally fertilized with urea
(200 kg/ha), TSP (150 kg/ha) and MP (75 kg/ha). The mean values of water quality
parameters viz., temperature, dissolved oxygen, pH, nitrate-nitrogen showed a very
small variations among different treatments, but phosphate-phosphorus and
chlorophyll-a were relatively higher in T4 without fish (i.e., control). The fish
production of 480.5 kg/ha in T3 was significantly higher than that of 355.6 kg/ha T2 and
223.8 kg/ha in T 1• The values of soil organic matter, total-nitrogen, phosphorus and
potassium at harvest were significantly (P<0.05) higher in the treatments with fish
than without fish, but pH did not show any significant differences. The yield of rice
grain and straw was also obtained significantly (P<0.05) higher in the treatments with
fish. The increase in grain was higher over the control by 11.81%, 9.41% and 14.76%
and that in straw was by 9.83%, 4.77% and 13.29% in Tl> T2, and T3 respectively.
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