EFFECT OF REPLACING FISH MEAL PROTEIN BY SHRIMP WASTE MEAL PROTEIN WITH OR WITH OUT AMINOACIDS ON PERFORMANCE OF BROILERS
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Date
2016-10
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SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517 502. (A.P.) INDIA
Abstract
ABSTRACT:
The present study was carried out with an objective to investigate the
growth performance, digestibility of nutrients, gut pathogen population,
serological parameters, haematological parameters and carcass traits of broilers
fed diets containing shrimp waste meal with or with-out amino acids.
Basal pre-starter, starter and finisher broiler diets were formulated with
conventional feed ingredients like maize, soya bean meal, de-oiled 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 22.04, 3000; 21.50, 3049 and 19.57, 3099 respectively.
The experimental diets in pre-starter phase were prepared by replacing
fish meal protein of the basal diet with the shrimp waste meal protein at 20%
level (T2) , 30% level (T3) and T4, T5 diets were prepared by adding synthetic
lysine and methionine to T2 and T3 diets. In starter and finisher phases five
experimental diets were prepared by replacing fish meal protein of the basal
diet with the shrimp waste meal protein at 50% level (T2) , 100% level (T3) and
T4, T5 diets were prepared by adding synthetic lysine and methionine to T2 and
T3 diets. The basal diet T1 was used as control containing maize, SBM, DORB
and 10 % fish meal. All diets were iso-nitrogenous and iso-caloric.
Three hundred and seventy five day old commercial broiler chicks were
distributed randomly to five 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 and thus a total
of 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,
haematological parameters. Carcass traits were studied at the end of the
experimental trial. There was no significant difference in body weight gain among
treatments during pre-starter phase.The body weight gain (BWG) was found
significantly (P<0.01) higher in birds fed (T4, T2 and T1) diets when compared
to birds fed T3 and T5 during starter, finisher and overall phases. Feed intake
was found to be significantly (P<0.01) higher in birds fed with control diet
compared to birds fed with (T2 to T5) diets at pre-starter phase. During starter,
finisher and overall growth phases no significant difference was noticed
regarding feed intake among treatments. Irrespective of the growth phase the
feed conversion ratio (FCR) was found non significant among treatments.
The nutrient digestibility of DM and CF was found to be non-significant
among treatments during starter and finisher phase. However during starter and
finisher phases CP and EE digestibilities were found significantly (P<0.01)
higher in birds fed T4 diet when compared to birds fed other diets T1, T2, T3 and
T5. 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,
T4 and T5 than control diet (T1) during pre-starter, starter and finisher phases.
In pre-starter and starter phases no significant difference was noticed
regarding levels of serum total protein (g/dl), albumin (g/dl), globulin (g/dl),
glucose (mg/dl) and cholesterol (mg/dl) among treatments (T1 to T5). In
finisher phase also there was no significant difference in levels of serum total
protein (g/dl), albumin (g/dl) and glucose (mg/dl) among treatments, but the
serum cholesterol levels (mg/dl) and globulin levels (g/dl) were found
significantly (P<0.01) higher in birds fed T1 diet than birds fed other diets (T2,
T3, T4 and T5). Non significant differences were noticed among treatment groups
regarding RBC count during the three phases of the study. During pre-starter
phase the WBC count (103/μl) was significantly higher (P<0.01) in the birds
fed with the diets T2, T3 ,T4 and T5 when compared to the birds fed with T1(
control diet). During starter and finisher phases the WBC count (103/μl) was
significantly higher (P<0.01) in the birds fed with the diets T2 and T3 than the
birds fed with T1 , T4 and T5. During the pre-starter and starter phases
lymphocyte (%) count was significantly higher (P<0.01) in T2 and T3 than in
T1, T4,and T5 fed birds.Whereas during the finisher phase there was no
significant difference among treatments. At the end of experimental period, the live weight gain, hot carcass weight and the dressing percentage were found significantly (P<0.01) higher in birds fed T4 diet when compared to birds fed other diets. The liver, gizzard and heart weights (g) were found significantly (P<0.01) higher in birds fed T4, T2, and T1 diets when compared to T3 and T5 group. The results of the present study indicated that the Protein from FM can be safely substituted up to 30% with the SWM protein in pre-starter and up to 50% in starter and finisher broiler diets for good economic returns and productive performance with amino acid supplementation (lysine and methionine).
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