Dietary supplementary glutamine and L-carnitine enhanced the anti-cold stress of Arbor Acres broilers
<p>Newborn poultry in cold regions often suffer from cold stress, causing a series of changes in their physiology and metabolism, leading to slow growth and decreased production performance. However, a single anti-stress substance cannot completely or maximally eliminate or alleviate the vario...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2021-06-01
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| Series: | Archives Animal Breeding |
| Online Access: | https://aab.copernicus.org/articles/64/231/2021/aab-64-231-2021.pdf |
| Summary: | <p>Newborn poultry in cold regions often suffer from cold stress,
causing a series of changes in their physiology and metabolism, leading to
slow growth and decreased production performance. However, a single
anti-stress substance cannot completely or maximally eliminate or alleviate
the various effects of cold stress on animals. Therefore, the effects of the
supplemented glutamine and L-carnitine on broilers under low temperature
were evaluated in this study. Broilers were randomly allocated into 16
groups which were respectively fed with different levels of glutamine and
L-carnitine according to the L<span class="inline-formula"><sub>16</sub></span> (4<span class="inline-formula"><sup>5</sup></span>) orthogonal experimental
design for 3 weeks (the first week is the adaptive feeding period; the
second and third weeks are the cold exposure period). Growth performance
was recorded, and blood samples were collected during cold exposure. The
results showed the supplementation had altered the plasma parameters, growth
performance and cold-induced oxidative stress. The increase of
corticosterone and suppression of thyroid hormone was ameliorated.
Supplemented groups had lower daily feed intake and feed-to-gain ratio, higher
daily weight gain and better relative weights of immune organs. Plasma
glucose, total protein, blood urea nitrogen and alkaline phosphatase
changed as well. Oxidative stress was mollified due to the improved
activities of superoxide dismutase and glutathione peroxidase, heightened
total antioxidant capacity and stable malondialdehyde. Dietary glutamine and
L-carnitine improve the growth performance, nutritional status and cold
stress response of broilers at low temperature, and their interaction
occurred.</p> |
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| ISSN: | 0003-9438 2363-9822 |