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| Titel: |
Amino acid composition of bacteria harvested from the rumen of dairy cows fed three diets differing in protein content and rumen protein degradability at two levels of intake |
| Auteur: |
Volden, Harald Harstad, Odd Magne |
| Verschenen in: |
Acta agriculturae Scandinavica. Section A, Animal science |
| Paginering: | Jaargang 48 (1998) nr. 4 pagina's 210-215 |
| Jaar: |
1998-11 |
| Inhoud: |
Six dairy cows fitted with rumen and duodenal cannulae were assigned to two replicated 3×3 Latin squares in order to examine amino acid (AA) composition of rumen liquid-associated bacteria (LAB) and solid-adherent bacteria (SAB). Treatments comprised three concentrate mixtures differing in the amount of rumen degradable intake protein (DIP): 13.4, 11.4 and 10.1% of DM, respectively. Measurements were taken in early lactation, at high feeding level (19.7 kg DM day-1), and repeated at late lactation (10 kg DM day-1) with the same animals and diets. The SAB contained more AA than LAB (P < 0.05), and differences in AA profiles between LAB and SAB were observed for 9 out of 17 AA studied. Feeding level affected only four AA. Increased levels of DIP in the concentrate mixtures increased the content of AA in the bacteria (P < 0.05). Addition of formaldehyde to the ruminai samples prior to bacterial isolation reduced the total AA content by 11%, on average. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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