Effects of grazing adaptation on intake, ruminal fermentation, blood metabolites, and body weight change in dairy cows after turning out to pasture in early spring
| Autor: | Tomoyo Kubota, Tomohiro Mitani, Koichiro Ueda, Hitoshi Mizuguchi, Shiro Kushibiki |
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| Rok vydání: | 2020 |
| Předmět: |
Rumen
Time Factors Nitrogen Metabolite ruminal fermentation Biology body weight change Body weight Pasture Blood Urea Nitrogen 03 medical and health sciences chemistry.chemical_compound Eating herbage intake Animal science NEFA Ammonia Grazing Ruminal fermentation Animals Herbivory 030304 developmental biology 0303 health sciences geography geography.geographical_feature_category Body Weight 0402 animal and dairy science grazing adaptation food and beverages blood metabolites 04 agricultural and veterinary sciences General Medicine 040201 dairy & animal science Adaptation Physiological chemistry Fermentation Urea Animal Nutritional Physiological Phenomena Cattle Female Seasons General Agricultural and Biological Sciences Barn (unit) |
| Zdroj: | Animal science journal = Nihon chikusan GakkaihoREFERENCES. 91(1) |
| ISSN: | 1740-0929 |
| Popis: | This study investigated the effect of adaptation to grazing in early spring on herbage intake, ruminal fermentation parameters, blood metabolite concentrations, and body weight change in dairy cows. The experiment was conducted on eight rumen-cannulated non-lactating cows in the early spring period. Four cows were adapted to grazing by stocking for 4 hr for 1 week (ADP group). The other cows were kept in a barn during the period (CON group). Then, both groups of cows were stocked together throughout a day on a 1 ha pasture for 3 weeks (experimental period). In the first week of the experimental period, compared to the CON group, the ADP group had a higher herbage intake, ruminal NH3-N and total VFA concentration, and blood urea concentration, but the NEFA concentration was lower in the ADP group (p < .01). During the subsequent weeks, there were little differences in ruminal fermentation parameters and blood metabolites. Cows in the ADP group maintained their body weight, but cows in the CON group lost 60 kg of body weight in the first week of the experimental period. |
| Databáze: | OpenAIRE |
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