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Keywords = Hubbard slow growth chicken

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16 pages, 325 KiB  
Article
Impact of Different Levels of Crude Protein on Production Performance and Meat Quality in Broiler Selected for Slow Growth
by Marius Giorgi Usturoi, Răzvan-Mihail Radu-Rusu, Alexandru Usturoi, Cristina Simeanu, Marius Gheorghe Doliș, Roxana Nicoleta Rațu and Daniel Simeanu
Agriculture 2023, 13(2), 427; https://doi.org/10.3390/agriculture13020427 - 11 Feb 2023
Cited by 10 | Viewed by 4416
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Animal Nutrition and Productions: Series II)
11 pages, 861 KiB  
Article
Poultry Meat Quality in Antibiotic Free Production Has Improved by Natural Extract Supplement
by Raffaella Rossi, Francesco Vizzarri, Sabrina Ratti and Carlo Corino
Animals 2022, 12(19), 2599; https://doi.org/10.3390/ani12192599 - 28 Sep 2022
Cited by 3 | Viewed by 2036
Abstract
Modern consumers are conscious of the relationship between meat quality and animal welfare. Today, slow-growing chickens are associated with a higher broiler welfare. The present work aims to evaluate the effect of dietary natural extract supplementation with polyphenols and seaweed mixtures (PPE) on [...] Read more.
Modern consumers are conscious of the relationship between meat quality and animal welfare. Today, slow-growing chickens are associated with a higher broiler welfare. The present work aims to evaluate the effect of dietary natural extract supplementation with polyphenols and seaweed mixtures (PPE) on breast and thigh muscles quality parameters in Hubbard JA57 slow growth chicken in antibiotic-free production. Five hundred Hubbard female chickens (250 from control and 250 from experimental group) were housed on floor pens (10 pens/treatment, 25 birds/pen) and assigned to two experimental groups: a control group (CON) receiving a commercial diet and another group receiving the same diet supplemented with 0.3% of polyphenols and seaweed mixtures (PPE). Dietary supplementation with PPE did not affect (p > 0.05) growth performances. The breast pH tended to be lower (p = 0.062) in PPE groups. The protein content of breast muscles resulted higher in PPE samples (p < 0.05) than controls. The thigh muscles from PPE group showed a lower (p < 0.05) malondialdehyde content than CON during refrigerated storage. In conclusion, the PPE supplement improves breast muscle protein content and oxidative stability of thigh muscle. This feeding practice is suggested to enhance the nutritional and technological parameters of meat Hubbard slow growth chicken in antibiotic-free production. Full article
(This article belongs to the Special Issue New and Potential Feedstuffs and Additives in Livestock)
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