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Impact of Different Levels of Crude Protein on Production Performance and Meat Quality in Broiler Selected for Slow Growth

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  • Marius Giorgi Usturoi

    (Department of Animal Resources and Technologies, Faculty of Food and Animal Sciences, “Ion Ionescu de la Brad” University of Life Sciences, 700489 Iasi, Romania)

  • Răzvan-Mihail Radu-Rusu

    (Department of Animal Resources and Technologies, Faculty of Food and Animal Sciences, “Ion Ionescu de la Brad” University of Life Sciences, 700489 Iasi, Romania)

  • Alexandru Usturoi

    (Department of Control, Expertise and Services, Faculty of Food and Animal Sciences, “Ion Ionescu de la Brad” University of Life Sciences, 700489 Iasi, Romania)

  • Cristina Simeanu

    (Department of Animal Resources and Technologies, Faculty of Food and Animal Sciences, “Ion Ionescu de la Brad” University of Life Sciences, 700489 Iasi, Romania)

  • Marius Gheorghe Doliș

    (Department of Animal Resources and Technologies, Faculty of Food and Animal Sciences, “Ion Ionescu de la Brad” University of Life Sciences, 700489 Iasi, Romania)

  • Roxana Nicoleta Rațu

    (Department of Food Technologies, Faculty of Agriculture, “Ion Ionescu de la Brad” University of Life Sciences, 700489 Iasi, Romania)

  • Daniel Simeanu

    (Department of Control, Expertise and Services, Faculty of Food and Animal Sciences, “Ion Ionescu de la Brad” University of Life Sciences, 700489 Iasi, Romania)

Abstract

The production performance and meat quality of the slow-growing hybrid Hubbard JA757 were monitored under conditions of diets differentiated by crude protein content. A total of 1200 as-hatched day-old chickens were equally and randomly allotted into two treatments (T-1 and T-2), with six replicates provided for each treatment (100 chickens/replicate). T-1 chickens received standard diets (according to Hubbard Company recommendations), and those in T-2 were fed diets supplemented with crude protein (+0.5% CP in the growing phase and +1.0% CP in the finishing phase). At the end of the investigations (age 56 days), the T-2 chickens performed better than the T-1 chickens for growth traits (+2.72% body weight; +2.77% daily growth gain; −0.34% mortality; and −4.15% feed conversion ratio); for slaughtering (+0.66% dressed yield; +1.10% breast weight; and +1.25% thigh weight); and for quality meat (+0.55% dry matter in thigh muscles and +1.52% dry matter in breast muscles) ( p > 0.05). Statistically significant differences ( p < 0.05) occurred between treatments for body weight, daily weight gain, and feed conversion ratio due to the 0.5% CP feed supplementation during the 15–28 day age period, justifying the usefulness of the CP increasing throughout the grower diet only and not during the finishing period.

Suggested Citation

  • Marius Giorgi Usturoi & Răzvan-Mihail Radu-Rusu & Alexandru Usturoi & Cristina Simeanu & Marius Gheorghe Doliș & Roxana Nicoleta Rațu & Daniel Simeanu, 2023. "Impact of Different Levels of Crude Protein on Production Performance and Meat Quality in Broiler Selected for Slow Growth," Agriculture, MDPI, vol. 13(2), pages 1-16, February.
  • Handle: RePEc:gam:jagris:v:13:y:2023:i:2:p:427-:d:1065464
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    References listed on IDEAS

    as
    1. Akifumi Ogino & Kazato Oishi & Akira Setoguchi & Takashi Osada, 2021. "Life Cycle Assessment of Sustainable Broiler Production Systems: Effects of Low-Protein Diet and Litter Incineration," Agriculture, MDPI, vol. 11(10), pages 1-14, September.
    2. Abdulrahman S. Alharthi & Ali R. Al Sulaiman & Riyadh S. Aljumaah & Abdulaziz A. Alabdullatif & Ahmed A. Elolimy & Abdulmohsen H. Alqhtani & Maged A. Al-Garadi & Alaeldein M. Abudabos, 2022. "Protective Effect of Date Pits on Growth Performance, Carcass Traits, Blood Indices, Intestinal Morphology, Nutrient Digestibility, and Hepatic Aflatoxin Residues of Aflatoxin B1-Exposed Broilers," Agriculture, MDPI, vol. 12(4), pages 1-11, March.
    3. Anna Milczarek & Magdalena Pachnik & Maria Osek & Renata Świnarska, 2022. "Rearing Performance and Carcass Composition of Broiler Chickens Fed Rations Containing Guar Meal at Graded Levels," Agriculture, MDPI, vol. 12(9), pages 1-17, September.
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    Cited by:

    1. Gabriela Frunză & Marius-Mihai Ciobanu & Otilia Cristina Murariu & Roxana Nicoleta Rațu & Răzvan-Mihail Radu-Rusu & Cristina Simeanu & Paul-Corneliu Boișteanu, 2023. "Effect of Gender and Muscle Type on Fatty Acid Profile, Sanogenic Indices, and Instrumental and Sensory Analysis of Flemish Giant Rabbit Meat," Agriculture, MDPI, vol. 13(12), pages 1-17, December.
    2. Daniel Simeanu & Răzvan-Mihail Radu-Rusu & Adrian Maximilian Macri & Daniel Mierliță, 2024. "Animal Nutrition and Productions: Series II," Agriculture, MDPI, vol. 14(3), pages 1-7, March.

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