Methane production and digestibility of kikuyu grass (Pennisetum clandestinum) and potato (Solanum tuberosum) mixtures.

The objective of this study was to evaluate the effect of the mixture of different ratios of kikuyu grass (Pennisetum clandestinum) (K) – potato (Solanum tuberosum) (P) on methane production in vitro, during the second semester of 2012 in the University Research Center (Medellín, Colombia). The trea...

Full description

Main Authors: Posada Ochoa, Sandra Lucía, Ramírez Agudelo, John Fredy, Rosero Noguera, Ricardo
Format: artículo científico
Language: Español
Published: Universidad de Costa Rica 2014
Online Access: http://revistas.ucr.ac.cr/index.php/agromeso/article/view/14214
http://hdl.handle.net/10669/17782
id RepoKERWA17782
recordtype dspace
spelling RepoKERWA177822021-04-14T14:59:06Z Methane production and digestibility of kikuyu grass (Pennisetum clandestinum) and potato (Solanum tuberosum) mixtures. Producción de metano y digestibilidad de mezclas kikuyo (Pennisetum clandestinum) - papa (Solanum tuberosum). Posada Ochoa, Sandra Lucía Ramírez Agudelo, John Fredy Rosero Noguera, Ricardo The objective of this study was to evaluate the effect of the mixture of different ratios of kikuyu grass (Pennisetum clandestinum) (K) – potato (Solanum tuberosum) (P) on methane production in vitro, during the second semester of 2012 in the University Research Center (Medellín, Colombia). The treatments consisted of mixtures K/P in ratios of 100/0 (T1), 75/25 (T2) and 50/50% (T3). The results were processed through a repeated measures analysis over time and nonlinear regression. At the end of incubation period (between 0 and 48 hours), the cumulative gas production (ml/g MSi), the cumulative methane production (ml/g MSi) and the dry matter digestibility were statistically differents (p<0.05) among all treatments, increasing with higher levels of potato in the mixture. In the same time interval, the relationship between dry matter digestibility and cumulative production of gas and methane (mg/ml) was statistically equivalent (p>0.05) among all treatments. The final volume of gas and methane (Vf) and its rate of production throughout the fermentation process (k), estimated from the Gompertz model, were also higher (p<0.05) for treatments including potato. Increased methane production is the result of higher dry matter digestibility according CNE level increases in the mixture. Under the in vitro model and in contrast to literature reports, the greater inclusion of CNE did not reduce methane production. El objetivo del presente trabajo fue evaluar el efecto de diferentes proporciones kikuyo (Pennisetum clandestinum) - papa (Solanum tuberosum) sobre la producción in vitro de metano. Durante el segundo semestre del año 2012 en la Sede de Investigación Universitaria (Medellín, Colombia), se evaluaron diferentes proporciones kikuyo (K) – papa (P) K/P de 100/0 (T1), 75/25 (T2) y 50/50% (T3). Los resultados obtenidos fueron procesados a través de análisis de medidas repetidas en el tiempo y de regresión no lineal. Al finalizar el período de incubación (entre 0 y 48 horas), la producción acumulada de gas (ml/g MSi), de metano (ml/g MSi) y la digestibilidad de la materia seca (%) presentaron diferencias estadísticas significativas (p<0,05) entre todos los tratamientos, aumentando con mayores niveles de inclusión de papa en la mezcla. En el mismo intervalo de tiempo, la relación entre la digestibilidad de la materia seca y la producción acumulada de gas y de metano (mg/ml) no mostró diferencia estadísticamente significativa (p>0,05) entre todos los tratamientos evaluados. El volumen final de gas y de metano (Vf) y su tasa de producción durante todo el proceso fermentativo (k), estimados a partir del modelo Gompertz, también fueron mayores (p<0,05) para los tratamientos incluyendo papa. La mayor producción de metano es resultado de la superior digestibilidad de la materia seca conforme se incrementó el nivel de carbohidratos no estructurales (CNE) en la mezcla. Bajo el modelo in vitro y a diferencia de los reportes de la literatura, la mayor inclusión de CNE no redujo la producción de metano. 2014-04-09 2016-05-02T20:55:06Z 2016-05-02T20:55:06Z artículo científico http://revistas.ucr.ac.cr/index.php/agromeso/article/view/14214 10.15517/am.v25i1.14214 http://hdl.handle.net/10669/17782 spa Copyright (c) 2014 Agronomía Mesoamericana application/pdf Universidad de Costa Rica Mesoamerican Journal of Agronomy; Agronomía Mesoamericana: Vol. 25, Nº 1; 141-150 Agronomía Mesoamericana; Agronomía Mesoamericana: Vol. 25, Nº 1; 141-150 2215-3608 1021-7444
institution Universidad de Costa Rica
collection Repositorio KERWA
language Español
description The objective of this study was to evaluate the effect of the mixture of different ratios of kikuyu grass (Pennisetum clandestinum) (K) – potato (Solanum tuberosum) (P) on methane production in vitro, during the second semester of 2012 in the University Research Center (Medellín, Colombia). The treatments consisted of mixtures K/P in ratios of 100/0 (T1), 75/25 (T2) and 50/50% (T3). The results were processed through a repeated measures analysis over time and nonlinear regression. At the end of incubation period (between 0 and 48 hours), the cumulative gas production (ml/g MSi), the cumulative methane production (ml/g MSi) and the dry matter digestibility were statistically differents (p<0.05) among all treatments, increasing with higher levels of potato in the mixture. In the same time interval, the relationship between dry matter digestibility and cumulative production of gas and methane (mg/ml) was statistically equivalent (p>0.05) among all treatments. The final volume of gas and methane (Vf) and its rate of production throughout the fermentation process (k), estimated from the Gompertz model, were also higher (p<0.05) for treatments including potato. Increased methane production is the result of higher dry matter digestibility according CNE level increases in the mixture. Under the in vitro model and in contrast to literature reports, the greater inclusion of CNE did not reduce methane production.
format artículo científico
author Posada Ochoa, Sandra Lucía
Ramírez Agudelo, John Fredy
Rosero Noguera, Ricardo
spellingShingle Posada Ochoa, Sandra Lucía
Ramírez Agudelo, John Fredy
Rosero Noguera, Ricardo
Methane production and digestibility of kikuyu grass (Pennisetum clandestinum) and potato (Solanum tuberosum) mixtures.
author_sort Posada Ochoa, Sandra Lucía
title Methane production and digestibility of kikuyu grass (Pennisetum clandestinum) and potato (Solanum tuberosum) mixtures.
title_short Methane production and digestibility of kikuyu grass (Pennisetum clandestinum) and potato (Solanum tuberosum) mixtures.
title_full Methane production and digestibility of kikuyu grass (Pennisetum clandestinum) and potato (Solanum tuberosum) mixtures.
title_fullStr Methane production and digestibility of kikuyu grass (Pennisetum clandestinum) and potato (Solanum tuberosum) mixtures.
title_full_unstemmed Methane production and digestibility of kikuyu grass (Pennisetum clandestinum) and potato (Solanum tuberosum) mixtures.
title_sort methane production and digestibility of kikuyu grass (pennisetum clandestinum) and potato (solanum tuberosum) mixtures.
publisher Universidad de Costa Rica
publishDate 2014
url http://revistas.ucr.ac.cr/index.php/agromeso/article/view/14214
http://hdl.handle.net/10669/17782
_version_ 1712705481649160192
score 11.814173