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Microbial phytase supplementation in Rohu, Labeo rohita, diets enhances growth performance and nutrient digestibility
Baruah, K.; Pal, A.K.; Sahu, N.P.; Debnath, D.; Nourozitallab, P.; Sorgeloos, P. (2007). Microbial phytase supplementation in Rohu, Labeo rohita, diets enhances growth performance and nutrient digestibility. J. World Aquacult. Soc. 38(1): 129-137. dx.doi.org/10.1111/j.1749-7345.2006.00081.x
In: Journal of the World Aquaculture Society. World Aquaculture Society: Baton Rouge, La.. ISSN 0893-8849; e-ISSN 1749-7345, more
Peer reviewed article  
Available in  Authors 
Keywords
    Chemical compounds > Organic compounds > Proteins
    Diets
    Enzymes
    Feeding
    Mineralization
    Properties > Organoleptic properties > Digestibility
    Marine/Coastal
Authors  Top 
  • Baruah, K., more
  • Pal, A.K.
  • Sahu, N.P.
  • Debnath, D.
  • Nourozitallab, P.
  • Sorgeloos, P., more
Abstract
    A feeding trial was conducted for 60 d to study the effect of dietary microbial phytase on growth performance and nutrient digestibility of rohu, Labeo rohita, fingerlings. One hundred and twenty fingerlings (average initial weight: 9.17 g/fish) were equally distributed into five experimental tanks, each with four replicates. Five isonitrogenous (35%) and isocaloric (16.79 kJ/g) diets were prepared from plant-based ingredients, supplemented with microbial phytase at the level of 0, 250, 500, 750, and 1000 U/kg diets and fed to T0, T1, T2, T3, and T4 groups, respectively. Weight gain %, food conversion ratio, protein efficiency ratio, and apparent net protein utilization were significantly (P < 0.05) improved in groups fed phytase-supplemented diets compared to control, the highest being observed in T 3 group. Maximum apparent digestibility of phosphorus and crude protein was recorded in T 3 group. Bone ash, phosphorus (P), and calcium (Ca) contents were also significantly (P < 0.05) increased in phytase-fed groups. However, maximum was recorded in T 3 group. Results from the present study indicated that addition of 750 U microbial phytase/kg diets effectively improved nutrient utilization, bone mineralization, and hence growth of L. rohita fingerlings.
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