Effect of ensiled crimped grape marc on energy intake, performance and gas emissions of beef cattle
| Autor: | P. I. Hynd, Mariana Caetano, M. J. Wilkes, S. J. Lee, Wayne S. Pitchford |
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| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
030309 nutrition & dietetics 0402 animal and dairy science Gas emissions 04 agricultural and veterinary sciences Total mixed ration Beef cattle 040201 dairy & animal science 03 medical and health sciences chemistry.chemical_compound Animal science chemistry Carbon dioxide Animal Science and Zoology Mathematics |
| Zdroj: | Animal Feed Science and Technology. 247:166-172 |
| ISSN: | 0377-8401 |
| Popis: | The objective of the current study was to evaluate the effect of ensiled crimped grape marc (ECGM) on energy intake, growth performance, and emissions of carbon dioxide (CO2) and methane (CH4) in beef cattle. Twenty Angus steers (390 ± 38 kg initial BW; mean ± s.d.; 14 months of age) were used in a randomised design to test two diets: control (CON, roughage-based diet) and grape marc (GMD; 300 g/kg of ECGM containing 31.2 g/kg of condensed tannins in the total mixed ration on DM basis). Steers were randomly stratified by initial BW and then assigned to treatment and either an individual or group-housed pen. Steers were fed twice daily for a total of 41 d. Following diet adaptation, steers were moved between individual and group pens every 8 d for three rotations, allowing individual DM intake and faecal output measurements to be quantified. Carbon dioxide and CH4 emissions were measured using two, portable, automated, open-circuit gas quantification systems (GQS). There were no significant treatment differences in average daily gain (ADG), however the final BW was 5% greater for steers fed CON than those fed GMD (P |
| Databáze: | OpenAIRE |
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