Seasonal and annual changes in the quality of native rangeland selected by grazing steers in northern Mexico

The objective of this study was to determine and compare seasonally the chemical composition, in vitro gas production, in situ degradability and ruminal fermentation of the diet selected by cattle grazing on native rangeland over two years. Diet samples were collected from four esophageal fistulated...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Reyes,Osvaldo, Murillo,Manuel, Herrera,Esperanza, Carrete,Francisco O
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2016
Materias:	Cattle grazing in vitro gas production in situ degradation ruminal fermentation
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000200003
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-16202016000200003
record_format	dspace
spelling	oai:scielo:S0718-162020160002000032016-10-07Seasonal and annual changes in the quality of native rangeland selected by grazing steers in northern MexicoReyes,OsvaldoMurillo,ManuelHerrera,EsperanzaCarrete,Francisco O Cattle grazing in vitro gas production in situ degradation ruminal fermentation The objective of this study was to determine and compare seasonally the chemical composition, in vitro gas production, in situ degradability and ruminal fermentation of the diet selected by cattle grazing on native rangeland over two years. Diet samples were collected from four esophageal fistulated steers (350 ± 3 kg BW), and four ruminally fistulated steers (342 ± 1.5 kg BW) were used to evaluate degradation and ruminal fermentation. Data were analyzed using a repeated measurements design. The crude protein (CP), in vitro dry matter digestibility (IVDMD) and metabolizable energy (ME) were higher in 2008 (P≤0.01) and in the summer (P≤0.05). The volatile fatty acids (VFA) and propionate concentrations were affected by season and year (P≤0.05). The gas produced by the soluble (a) and insoluble (b) fractions and the constant rate of gas production (c) were greater in the summer and fall (P≤0.05). The values of effective degradability of dry matter (EDDM) were greater in 2008 (P≤0.01) and during the summer (P≤0.05). Likewise, ruminal NH3N concentrations were greater in 2008 and during the summer (P≤0.05). The total concentrations of volatile fatty acids (VFA) and propionate were affected by year (P≤0.05) and season (P≤0.05). This study showed a reduction in the nutritive value of the diet selected by grazing cattle due to annual and seasonal changes.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.43 n.2 20162016-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000200003en10.4067/S0718-16202016000200003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Cattle grazing in vitro gas production in situ degradation ruminal fermentation
spellingShingle	Cattle grazing in vitro gas production in situ degradation ruminal fermentation Reyes,Osvaldo Murillo,Manuel Herrera,Esperanza Carrete,Francisco O Seasonal and annual changes in the quality of native rangeland selected by grazing steers in northern Mexico
description	The objective of this study was to determine and compare seasonally the chemical composition, in vitro gas production, in situ degradability and ruminal fermentation of the diet selected by cattle grazing on native rangeland over two years. Diet samples were collected from four esophageal fistulated steers (350 ± 3 kg BW), and four ruminally fistulated steers (342 ± 1.5 kg BW) were used to evaluate degradation and ruminal fermentation. Data were analyzed using a repeated measurements design. The crude protein (CP), in vitro dry matter digestibility (IVDMD) and metabolizable energy (ME) were higher in 2008 (P≤0.01) and in the summer (P≤0.05). The volatile fatty acids (VFA) and propionate concentrations were affected by season and year (P≤0.05). The gas produced by the soluble (a) and insoluble (b) fractions and the constant rate of gas production (c) were greater in the summer and fall (P≤0.05). The values of effective degradability of dry matter (EDDM) were greater in 2008 (P≤0.01) and during the summer (P≤0.05). Likewise, ruminal NH3N concentrations were greater in 2008 and during the summer (P≤0.05). The total concentrations of volatile fatty acids (VFA) and propionate were affected by year (P≤0.05) and season (P≤0.05). This study showed a reduction in the nutritive value of the diet selected by grazing cattle due to annual and seasonal changes.
author	Reyes,Osvaldo Murillo,Manuel Herrera,Esperanza Carrete,Francisco O
author_facet	Reyes,Osvaldo Murillo,Manuel Herrera,Esperanza Carrete,Francisco O
author_sort	Reyes,Osvaldo
title	Seasonal and annual changes in the quality of native rangeland selected by grazing steers in northern Mexico
title_short	Seasonal and annual changes in the quality of native rangeland selected by grazing steers in northern Mexico
title_full	Seasonal and annual changes in the quality of native rangeland selected by grazing steers in northern Mexico
title_fullStr	Seasonal and annual changes in the quality of native rangeland selected by grazing steers in northern Mexico
title_full_unstemmed	Seasonal and annual changes in the quality of native rangeland selected by grazing steers in northern Mexico
title_sort	seasonal and annual changes in the quality of native rangeland selected by grazing steers in northern mexico
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000200003
work_keys_str_mv	AT reyesosvaldo seasonalandannualchangesinthequalityofnativerangelandselectedbygrazingsteersinnorthernmexico AT murillomanuel seasonalandannualchangesinthequalityofnativerangelandselectedbygrazingsteersinnorthernmexico AT herreraesperanza seasonalandannualchangesinthequalityofnativerangelandselectedbygrazingsteersinnorthernmexico AT carretefranciscoo seasonalandannualchangesinthequalityofnativerangelandselectedbygrazingsteersinnorthernmexico
_version_	1714202170586300416

Seasonal and annual changes in the quality of native rangeland selected by grazing steers in northern Mexico

Ejemplares similares