© Impact Journals EFFECTS OF ORGANIC FERTILIZER AND SUPPLEMENTARY FEEDS ON GROWTH PERFORMANCE OF SILVER CARP (HYPOPHTHALMICHTHYS MOLITRIX) AND BATA (CIRRHINUS REBA) FRY IN NURSERY PONDS

Experiment was conducted to evaluate the effects of an organic fertilizer and supplementary feeds on the growth performance of silver carp(Hypophthalmichthysmolitrix) and bata (Cirrhinusreba) fry for a period of 90 days.It was carried out under 3 (three)treatmentswere consisted of mustard oil cake (T1), cow dung (T2) and rice bran + mustard oil cake (T3) with each three replications. The fries were initially fed at the rate of 30 % of body weight and it was reduced to 15 % gradually. The rate of cow dung application was 988 kg/ha. During the experimental period, the water parameters werein suitable range.The average weight gain of silver carp and bata in T3 (4.69±0.17 g and 2.05±0.08 g) was significantly ((p<0.05) higher than those of T1 (3.00±0.16g and 1.81±0.02 g) and T2 (2.32±0.09 g and 1.19±0.13 g). The survival rate was found significant 59.12, 55.05 and 63.33 % for Silver carp and 52.15, 51.10 and 55.18 % for bata in T1, T2 and T3respectively. The SGR of silver carp and bata in T3 (2.55±0.43%bwd-1 and 2.29±0.08%bwd-1) was significantly ((p<0.05) higher than those of T1 (2.32±0.46%bwd-1 and 1.95±0.47 %bwd-1) and T2 (1.91±0.40 %bwd-1 and 1.72±0.28 %bwd-1). Among the treatments, significantly highest production of Silver carp and Bata(2276.01±85.95 and1855.38±35.95 kg/ha)was achieved from T3 followed by T1 (2116±6.72 and 1745.98±12.31 kg/ha) and T2 (2058.48±26.68 and 1432.82±16.82 kg/ha)