| Autor: |
Sai Zhang, Jay S. Johnson, Mu Qiao, Nathalie L. Trottier |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Journal of Animal Science and Biotechnology, Vol 11, Iss 1, Pp 1-16 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2049-1891 |
| DOI: |
10.1186/s40104-019-0414-x |
| Popis: |
Abstract Background The study objective was to test the hypothesis that 1) lowering dietary crude protein (CP) increases dietary energetic efficiency and reduces metabolic heat associated with lactation, and 2) excessive dietary leucine (Leu) supplementation in a low CP diet decreases dietary energetic efficiency and increases metabolic heat associated with lactation. Methods Fifty-four lactating multiparous Yorkshire sows were allotted to 1 of 3 isocaloric diets (10.80 MJ/kg net energy): 1) control (CON; 18.75% CP), 2) reduced CP with a near ideal or optimal AA profile (OPT; 13.75% CP) and 3) diet OPT with excessive Leu (OPTLEU; 14.25% CP). Sow body weight and backfat were recorded on day 1 and 21 of lactation and piglets were weighed on day 1, 4, 8, 14, 18, and 21 of lactation. Energy balance was measured on sows during early (day 4 to 8) and peak (day 14 to18) lactation, and milk was sampled on day 8 and 18. Results Over 21-day lactation, sows fed OPT lost body weight and body lipid (P |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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