| Autor: |
Nuo Heng, Shan Gao, Yu Chen, Liang Wang, Zheng Li, Yong Guo, Xihui Sheng, Xiangguo Wang, Kai Xing, Longfei Xiao, Hemin Ni, Xiaolong Qi |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Poultry Science, Vol 100, Iss 5, Pp 101045- (2021) |
| Druh dokumentu: |
article |
| ISSN: |
0032-5791 |
| DOI: |
10.1016/j.psj.2021.101045 |
| Popis: |
The objective of this study was to evaluate the effects of natural astaxanthin (ASTA) from Haematococcus pluvialis on production performance, egg quality, antioxidant enzyme activity, free radical scavenging ability, and gene expression of antioxidant enzymes in laying hens. Nongda No. 3 laying hens (n = 450) were randomly allocated to 1 of 5 dietary treatments. Each treatment had 6 replicates of 15 hens each. All birds were assigned to a corn-soybean meal-based diet containing 0, 20, 40, 80, or 160 mg/kg ASTA for 4 wk. With increasing dietary ASTA, no significant effects were observed on egg weight, feed consumption, feed efficiency, laying rate, Haugh unit, or eggshell strength. Yolk color darkened linearly with increasing dose of ASTA (P |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
