PERFORMANCE OF BROILERS FED DIETS CONTAINING SHRIMP WASTE MEAL
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Date
2016-01
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SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517 502. (A.P.) INDIA
Abstract
ABSTRACT:
The present study was carried out with a view to investigate the growth performance, digestibility of nutrients, gut pathogen population, serological parameters and carcass traits of broilers fed diets containing shrimp waste meal.
Basal pre-starter, starter and finisher broiler diets were formulated with commonly available feed ingredients like maize, soya bean meal, deoiled rice bran (DORB) and fish meal as per the Nutrient Requirements of Poultry (ICAR, 2013). The CP (%) and ME (kcal/kg) contents of the basal pre starter, starter and finisher diets were 22.06, 3000 ; 21.50, 3049 ; 19.55, 3099, respectively. The experimental diets were prepared by incorporating shrimp waste meal at 5, 7.5 and 10% level to basal pre starter, starter and finisher diets. Four experimental diets T1 (Basal diet), T2 (Basal diet containing 5 % SWM), T3 (Basal diet containing 7.5 % SWM), T4 (Basal diet containing 10 % SWM) were prepared. Three hundred day old, commercial broiler chicks were distributed randomly to four treatments with three replicates of twenty five birds each. The experiment was carried out from day old to 42 days of age. Weekly body weight gains and feed intake were recorded and feed efficiency was calculated accordingly. Metabolism trials were conducted to study the digestibility of nutrients during starter (0-28 days) and finisher (29-42 days) phases. At the end of 2, 4 and 6 weeks two birds per replicate, six birds per treatment were sacrificed to study the effect of shrimp waste meal on E.coli and Salmonella count of the cecal contents and on serological parameters. Carcass traits were studied at the end of the experimental trial.
The body weight gain (BWG) was found significantly (P<0.01) higher in birds fed SWM supplemented diets (T2, T3 and T4) when compared to birds fed control diet (T1) during pre-starter, finisher and overall phases. Irrespective of the growth phase feed intake was found to be significantly (P<0.05) at starter and finisher phases, (P<0.01) at pre-starter and overall phases) higher in birds fed T2 diet when compared to control diet (T1). The feed conversion ratio (FCR) was found significantly (P<0.01) superior in birds fed diets supplemented with SWM (T2, T3 and T4) than control diet (T1) during pre-starter, finisher and overall phases. The nutrient digestibility of DM, EE and CF was found to be non-significant among treatments during starter and finisher phase. However during starter phase CP digestibility was found significantly (P<0.05) higher in birds fed T2 diet when compared to birds fed other diets (T1, T3 and T4). During finisher phase CP digestibility was significantly (P<0.01) higher in birds fed T2 diet when compared to control (T1). The E.coli and Salmonella count (log cfu/g) of cecal contents were found significantly (P<0.01) lower in birds fed SWM supplemented diets (T2, T3 and T4) than control diet (T1) during pre-starter, starter and finisher phases. The serum protein levels (g/dl) and globulin levels (g/dl) were found significantly (P<0.1) higher in birds fed T2 diet than birds fed other diets (T1, T3 and T4) during starter phase. Whereas during finisher phase the serum protein and globulin levels were found significantly higher (P<0.05) in birds fed T2 diet when compared to control diet (T1). Non significant differences were noticed among treatment groups during pre-starter phase regarding serum protein and globulin levels. Irrespective of the growth phase no significant differences were noticed regarding serum glucose, albumin and cholesterol values among treatment groups.
The live weight, hot carcass weight and the dressing percentage were found significantly (P<0.01) higher in birds fed T2 diet when compared to birds fed other diets. Non significant differences were noticed among treatment groups regarding liver, gizzard and heart weights (g). During pre-starter phase mortality was high in birds fed with high levels of SWM in the diet and was gradually reduced up to finisher phase. The feed cost/kg weight gain was found significantly (P<0.01) lower in SWM fed birds (T2, T3 and T4) than birds fed control diet (T1).
The results of present study revealed that the shrimp waste meal can safely be incorporated up to 5% level in pre starter, up to 7.5% level in starter and up to 10% level in finisher broiler diets for better economics and improved productive performance.
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