Effect of thyme essential oil on rumen parameters, nutrient digestibility, and nitrogen balance in wethers fed high concentrate diets
| Autor: | Ivanete Susin, Alexandre Arantes Miszura, José Paulo Roman Barroso, T.T. Souza, A.R. Cunha, M. V. C. Ferraz Junior, Evandro Maia Ferreira, A.D.B. Ribeiro, Daniel Montanher Polizel, Alexandre Vaz Pires |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Nitrogen balance General Veterinary ruminal pH Feed additive Monensin 0402 animal and dairy science 04 agricultural and veterinary sciences SF1-1100 040201 dairy & animal science Animal culture monensin 03 medical and health sciences chemistry.chemical_compound Rumen p-cymene 030104 developmental biology Animal science chemistry thymol Feedlot TOMILHO Dry matter Nutrition physiology Thymol |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Arquivo Brasileiro de Medicina Veterinária e Zootecnia v.72 n.2 2020 Arquivo brasileiro de medicina veterinária e zootecnia Universidade Federal de Minas Gerais (UFMG) instacron:UFMG Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Vol 72, Iss 2, Pp 573-580 (2020) |
| Popis: | This trial aimed to evaluate the effects of thyme essential oils (EO) on rumen parameters, nutrient digestibility and nitrogen balance in wethers fed with high-concentrate diet. Twenty rumen-cannulated wethers were blocked according to body weight (BW= 64.0±2.1kg), and received one of the following treatments: 25mg of monensin/kg of dry matter (DM; MON) or doses of thyme EO (1.25, 2.50 or 3.75g/kg of DM). The diet was composed of 90% concentrate. Thyme EO was composed mainly by thymol (46.6% of DM) and p-cymene (38.9% of DM). The nutrient intake and apparent digestibility were similar among treatments. The inclusion of 3.75g of thyme EO tended (P= 0.07) to increase butyrate compared to MON and 1.25OE and wethers fed with 1.25g of thyme EO tended (P= 0.07) to decrease ruminal pH on the 14th day compared to MON. The treatments did not affect acetate:propionate ratio, total short chain fatty acids (SCFA) and nitrogen retention. Results from this study suggest that adding thyme EO to high-concentrate diets may be used as an alternative to monensin as feed additive in feedlot lambs. |
| Databáze: | OpenAIRE |
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