Effect of Diets with Different Energy and Protein Levels on Breast Muscle Characteristics at Broiler Chickens

Adela Marcu, Ioan Vacaru-Opriş, Gabi Dumitrescu, Adrian Marcu, Liliana Petculescu Ciochină, Marioara Nicula, Dorel Dronca, Bartolomeu Kelciov

Abstract


In this paper was studied the effect of dietary energy and protein levels on breast muscle characteristics at broiler chickens, which were sacrificed at 42 days old. The genetic material was represented by broiler chickens that belonged to the „Ross-308” hybrid, with three groups (LC-control group, L1 and L2 experimental groups). In the growth periods (starter, growing and finishing) have received compound feed ad libitum, with different energy and protein levels (LC-was conforming to recommendations of Aviagen Company; L1-higher with 10%; L2-lower with 10%). After evisceration, from each group were sampled breasts from 10 carcasses (five per sex) and were determined: muscle mass, meat:bones ratio, chemical composition of meat, pH value (after evisceration up to 24 h of refrigeration) and the thickness of myocytes in the superficial pectoral muscle. For these characteristics, highest values were obtained at L1 group, and the lowest values were at L2 group. At the L1 group, high levels of dietary proteins and energy has significantly influenced: muscle mass, meat:bones ratio, chemical composition of meat (water, proteins and lipids), pH value and the thickness of myocytes in the superficial pectoral muscle, as compared with LC and L2.


Keywords


breast, broiler chicken, meat, myocytes, pH value

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Scientific Papers Animal Science and Biotechnologies publish open access articles under the terms of the Creative Commons Attribution 4.0 Licence (read full legal code).


LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
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Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Faculty of Animal Science and Biotechnologies
300645, Timişoara, Calea Aradului 119, Romania

E-mail: spasb [at] animalsci-tm.ro
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