Effects of Kikuyu grass (Pennisetum clandestinum) age and different forage: concentrate ratios on methanogenesis
Objective. To evaluate the effect of Kikuyu grass (Pennisetum clandestinum) harvested at two different ages and three forage: concentrate supplement ratios (F/C) on methane (CH4) production, dry matter digestibility (DMD), and fermentation profile using the in vitro gas production technique. Materia...
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| Format: | Article |
| Language: | English |
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Universidad de Cordoba
2015-09-01
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| Series: | Revista MVZ Cordoba |
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| Online Access: | http://revistas.unicordoba.edu.co/revistamvz/mvz-203/v20n3a07.pdf |
| _version_ | 1818268594719424512 |
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| author | John Ramírez Sandra Posada O Ricardo Noguera |
| author_facet | John Ramírez Sandra Posada O Ricardo Noguera |
| author_sort | John Ramírez |
| collection | DOAJ |
| description | Objective. To evaluate the effect of Kikuyu grass (Pennisetum clandestinum) harvested at two different ages and three forage: concentrate supplement ratios (F/C) on methane (CH4) production, dry matter digestibility (DMD), and fermentation profile using the in vitro gas production technique. Materials and methods. six treatments, resulting from the combination of pasture age (30 or 60 days) and F/C (100/0, 75/25, or 50/50) were evaluated using a 2x3 factorial design. The response variables were measured 6, 12, 24 and 48 hours after incubation. A repeated-measure over time design was used to analyze the data, and differences between means were determined with the LSMEANS procedure of SAS. Results. the youngest grass (30 days) was more digestible, produced less CH4 per gram of digestible dry matter (dDM) and more total volatile fatty acids (VFA) compared to the oldest grass (60 days; p <0.05). Reductions of the F/C ratio increased DMD and CH4 production per gram of dDM (p<0.05) but had no significant effect on VFA concentration (p>0.05). Conclusions. under in vitro conditions and pH close to neutrality, the older grass reduces DMD and increases CH4 production per gram of dDM, while a F/C reduction increases DMD and CH4 production per gram of dDM, which differs with reports conducted in vivo. |
| first_indexed | 2024-12-12T20:40:59Z |
| format | Article |
| id | doaj.art-b56b2193afd34c47a21438cd92aa5486 |
| institution | Directory Open Access Journal |
| issn | 0122-0268 0122-0268 |
| language | English |
| last_indexed | 2024-12-12T20:40:59Z |
| publishDate | 2015-09-01 |
| publisher | Universidad de Cordoba |
| record_format | Article |
| series | Revista MVZ Cordoba |
| spelling | doaj.art-b56b2193afd34c47a21438cd92aa54862022-12-22T00:12:45ZengUniversidad de CordobaRevista MVZ Cordoba0122-02680122-02682015-09-0120347264738Effects of Kikuyu grass (Pennisetum clandestinum) age and different forage: concentrate ratios on methanogenesisJohn Ramírez0Sandra Posada O1Ricardo Noguera2Universidad de Antioquia, Facultad de Ciencias Agrarias, Grupo de Investigación en Ciencias Agrarias-GRICA, AA 1226, Medellín, Colombia.Universidad de Antioquia, Facultad de Ciencias Agrarias, Grupo de Investigación en Ciencias Agrarias-GRICA, AA 1226, Medellín, Colombia.Universidad de Antioquia, Facultad de Ciencias Agrarias, Grupo de Investigación en Ciencias Agrarias-GRICA, AA 1226, Medellín, Colombia.Objective. To evaluate the effect of Kikuyu grass (Pennisetum clandestinum) harvested at two different ages and three forage: concentrate supplement ratios (F/C) on methane (CH4) production, dry matter digestibility (DMD), and fermentation profile using the in vitro gas production technique. Materials and methods. six treatments, resulting from the combination of pasture age (30 or 60 days) and F/C (100/0, 75/25, or 50/50) were evaluated using a 2x3 factorial design. The response variables were measured 6, 12, 24 and 48 hours after incubation. A repeated-measure over time design was used to analyze the data, and differences between means were determined with the LSMEANS procedure of SAS. Results. the youngest grass (30 days) was more digestible, produced less CH4 per gram of digestible dry matter (dDM) and more total volatile fatty acids (VFA) compared to the oldest grass (60 days; p <0.05). Reductions of the F/C ratio increased DMD and CH4 production per gram of dDM (p<0.05) but had no significant effect on VFA concentration (p>0.05). Conclusions. under in vitro conditions and pH close to neutrality, the older grass reduces DMD and increases CH4 production per gram of dDM, while a F/C reduction increases DMD and CH4 production per gram of dDM, which differs with reports conducted in vivo.http://revistas.unicordoba.edu.co/revistamvz/mvz-203/v20n3a07.pdfCarbohydratesin vitro digestibilitygrass maturitymethane production |
| spellingShingle | John Ramírez Sandra Posada O Ricardo Noguera Effects of Kikuyu grass (Pennisetum clandestinum) age and different forage: concentrate ratios on methanogenesis Revista MVZ Cordoba Carbohydrates in vitro digestibility grass maturity methane production |
| title | Effects of Kikuyu grass (Pennisetum clandestinum) age and different forage: concentrate ratios on methanogenesis |
| title_full | Effects of Kikuyu grass (Pennisetum clandestinum) age and different forage: concentrate ratios on methanogenesis |
| title_fullStr | Effects of Kikuyu grass (Pennisetum clandestinum) age and different forage: concentrate ratios on methanogenesis |
| title_full_unstemmed | Effects of Kikuyu grass (Pennisetum clandestinum) age and different forage: concentrate ratios on methanogenesis |
| title_short | Effects of Kikuyu grass (Pennisetum clandestinum) age and different forage: concentrate ratios on methanogenesis |
| title_sort | effects of kikuyu grass pennisetum clandestinum age and different forage concentrate ratios on methanogenesis |
| topic | Carbohydrates in vitro digestibility grass maturity methane production |
| url | http://revistas.unicordoba.edu.co/revistamvz/mvz-203/v20n3a07.pdf |
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