Phase feeding with different energy and protein levels in comparison with NRC and Ross feeding system on growth performance, carcass characteristics and blood metabolites of broilers

Manzari, Y.; Mazhari, Mozhgan; Esmaeili, O. A.; Moosaee, A.

doi:10.22092/asj.2017.109339.1388

Document Type : Research Paper

Authors

University of Jiroft

https://doi.org/10.22092/asj.2017.109339.1388

Abstract

In this experiment, 160 one day old male broilers were used to compare the effect of weekly changing of metabolizable energy (ME) and protein (CP) levels with NRC and Ross feeding system on growth performance, carcass characteristics and blood metabolites of broilers. Experiment was done in a completely randomized design with 4 treatment and 4 replicates (10 birds each). There were four experimental treatments including: T1: diets formulated based on NRC recommendation, T2: diets formulated based on Ross recommendation T3: phase feeding 1 and T4: phase feeding 2. The results showed that lowering ME and CP level did not have any adverse effect on broiler performance till 14 days of age. In grower, finisher and whole period, significant effect of treatments was seen on performance traits (P<0.05). Cost calculations showed that the most food cost was seen for NRC diets and the lowest cost was for phase feeding 2 diet. The best weight gain and feed conversion ratio was observed in birds feeding by Ross diet and after that NRC diet and T3. Effect of treatments on the relative weight of breast, abdominal fat and spleen was significant (P<0.05). Effect of treatment on blood metabolites including glucose, cholesterol and blood cells was not significant but heterophil to lymphocyte ratio was differed significantly (P<0.05) as it was higher in birds with weekly changing of diets.

Keywords

References

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Research Journal of Livestock Science

Phase feeding with different energy and protein levels in comparison with NRC and Ross feeding system on growth performance, carcass characteristics and blood metabolites of broilers

References

References

Volume 31, Issue 118
June 2018
Pages 45-60

Phase feeding with different energy and protein levels in comparison with NRC and Ross feeding system on growth performance, carcass characteristics and blood metabolites of broilers

References

References

Volume 31, Issue 118June 2018Pages 45-60

Volume 31, Issue 118
June 2018
Pages 45-60