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174822

GROWTH PERFORMANCE AND CARCASS CHARACTERISTICS OF RAHMANI LAMBS FED DIFFERENT DIETARY PROTEIN LEVELS

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Last updated: 23 Jan 2023

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Abstract

Fifteen male Rahmani lambs (8 months in age with an average body weight 30.52 ± 0.21 Kg) were used in this study to evaluate the effect of different protein levels in diets on the performance, nutrient digestibility, blood parameters, ruminal characteristics and carcass traits in addition to economical benefit. Animals were randomly divided into 3 similar groups (5 lambs each). Each group was fed on one of the protein level tested (12, 14.70 & 17% CP) for 90 days. The medium protein's ration (14.7 %) was considered as control. The two different protein levels as treatments (high protein, HP = 17%, low protein, LP= 12%). All diets contained the same digestible energy (3.20 MCal/kg DE / kg diet). There was significant (P<0.05) difference in the feed intake, weight gain and feed conversion between different experimental groups. The apparent digestion coefficients of DM, CP, EE, CF & NFE were significantly (P<0.05) increased with increasing dietary protein levels. There was significant (P<0.05) increase in the total protein, albumin, globulin and urea as the protein level increased. The levels of protein had no significant effect on the pH of the rumen, while ammonia-N concentration and total volatile fatty acids were significantly (P<0.05) increased. There were no significant differences in the carcass characteristics between treated groups. Consequently, it was considered that feeding Rahmani lambs with higher protein level than 14.7% had no advantage for performance and would be cause of economic loss, it can be said that, 14.7% CP was optimal.  

DOI

10.21608/avmj.2009.174822

Keywords

GROWTH PERFORMANCE AND CARCASS CHARACTERISTICS OF RAHMANI LAMBS FED DIFFERENT DIETARY PROTEIN LEVELS

Authors

First Name

A.N.

Last Name

SAYED

MiddleName

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Affiliation

Dept. of Animal and Clinical Nutrition, Faculty of Vet. Med., Assiut University

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Orcid

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First Name

M.N.M.

Last Name

ABD EL-ATI

MiddleName

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Affiliation

Dept. of Animal and Poultry production. Fac. of Agric., Assiut Univ.

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Volume

55

Article Issue

122

Related Issue

24382

Issue Date

2009-07-01

Receive Date

2009-04-16

Publish Date

2009-06-01

Page Start

1

Page End

12

Print ISSN

1012-5973

Online ISSN

2314-5226

Link

https://avmj.journals.ekb.eg/article_174822.html

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https://avmj.journals.ekb.eg/service?article_code=174822

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3

Type

Research article

Type Code

1,840

Publication Type

Journal

Publication Title

Assiut Veterinary Medical Journal

Publication Link

https://avmj.journals.ekb.eg/

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Article

Created At

23 Jan 2023