| Autor: |
Gilberto Vilmar Kozloski, Cristiano Miguel Stefanello, Suelen Ávila, Tiago Orlandi, Fernanda Hentz, Carla Joice Härter |
| Rok vydání: |
2012 |
| Předmět: |
|
| Zdroj: |
Small Ruminant Research. 106:125-130 |
| ISSN: |
0921-4488 |
| DOI: |
10.1016/j.smallrumres.2012.06.005 |
| Popis: |
Four Polwarth × Texel wethers (30 ± 1.8 kg body weight), fitted with a chronic rumen catheter and duodenal cannulae, housed in metabolic cages and offered ryegrass (Lolium multiflorum Lam) ad libitum were used in a 4 × 4 Latin Square experiment to evaluate the effects of infusing Acacia mearnsii tannin extract on intake, digestion and nutrients supply. Treatments consisted of no tannin (0) or intraruminal infusion of a tannin extract solution in a final volume that allowed for a tannin extract concentration of 20, 40 or 60 g/kg of dry matter (DM) intake. Intake and total digestibility of organic matter (OM), neutral detergent fiber (NDF) and N compounds linearly reduced (P ≤ 0.05) at increased levels of tannin infusion. Urinary N excretion linearly decreased (P ≤ 0.05) whereas the proportion of ingested N, which was retained was not affected by treatments. Duodenal flow of α-amino N was not affected by treatments whereas rumen microbial N entering the duodenum tended to linearly decreased (P = 0.15) at increased levels of tannin infusion. Ruminal degradability of both OM and dietary N compounds linearly decreased (P |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect