| Autor: |
J.L. Qiu, Q. Zhou, J.M. Zhu, X.T. Lu, B. Liu, D.Y. Yu, G. Lin, T. Ao, J.M. Xu |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Poultry Science, Vol 99, Iss 3, Pp 1483-1490 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
0032-5791 |
| DOI: |
10.1016/j.psj.2019.11.006 |
| Popis: |
The objective of this study was to investigate the effects of low inclusion levels of organic trace minerals (iron, copper, manganese, and zinc) on performance, eggshell quality, serum hormone levels, and enzyme activities of laying hens during the late laying period. A total of 405 healthy hens (HY-Line White, 50-week-old) were randomly divided into 3 treatments, with 9 replications per treatment and 15 birds per replication. The dietary treatments included a basal diet supplemented with inorganic trace minerals at commercial levels (CON), a basal diet supplemented with inorganic trace minerals at 1/3 commercial levels (ITM), and a basal diet supplemented with proteinated trace minerals at 1/3 commercial levels (TRT). The trial lasted 56 D (8 wk). Compared with the CON group, the ITM group showed decrease in (P 0.05). Furthermore, hens fed with low inclusion levels of organic trace minerals had smaller mammillary knobs (P |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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