Performance and ultrasound measurements of beef cattle fed diets based on whole corn or oats grains

This study intended to contrast dietary effects of whole grain oats versus corn included in rations with moderate roughage content on animal performance, beef ultrasound measurements, rumen and blood parameters. Ten Aberdeen Angus steers (203 kg) in individual pens were fed twice daily on either who...

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Autores principales:	Arelovich,Hugo M, Bravo,Rodrigo D, Martinez,Marcela F, Forgue,Pedro L, Torquati,Sergio O
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2013
Materias:	Blood steers feed efficiency parameters rumen environment
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000300009
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spelling	oai:scielo:S0718-583920130003000092018-10-02Performance and ultrasound measurements of beef cattle fed diets based on whole corn or oats grainsArelovich,Hugo MBravo,Rodrigo DMartinez,Marcela FForgue,Pedro LTorquati,Sergio O Blood steers feed efficiency parameters rumen environment This study intended to contrast dietary effects of whole grain oats versus corn included in rations with moderate roughage content on animal performance, beef ultrasound measurements, rumen and blood parameters. Ten Aberdeen Angus steers (203 kg) in individual pens were fed twice daily on either whole oats (OD) or corn (CD) based diets. Measurements were: DM intake (DMI), average daily gain (ADG), feed to gain ratio (F/G); back fat (BF) and rib eye area (RA); blood parameters. Four cannulated steers were used to study rumen pH, NH3-N and grain degradability. Rations dietary components were 55% grain, 30.1% barley straw, and 10.6% whole soybeans. Despite calculated higher ME supply (P = 0.0887) no differences were found for DMI, ADG, or F/G. Metabolizable protein intake (19.4%) was larger and degradable protein intake (43.3%) smaller for CD compared with OD (P < 0.01). The growth rate (cm² d-1) for RA was 40% grater for OD, but larger BF deposition (P = 0.0787) was found for CD. Blood Mg was higher for OD (p = 0.0564), nevertheless other blood parameters remained unaffected. Rumen pH and NH3-N were not influenced by diet, variations were only observed within time periods. Rumen pH decreased linearly from 7.05 to 6.13 and 7.11 to 6.37 for OD and CD respectively (P < 0.05). Minimum NH3-N concentrations (mg dL-1) were reached 12 and 18 h after morning meal for OD (7.10) and CD (5.82) respectively. Rumen degradation was larger for oats than corn. Whole oats rather than corn fed up to 55% of total DM seems to improve protein deposition, without significant changes in animal performance, rumen environment or blood parameters.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.73 n.3 20132013-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000300009en10.4067/S0718-58392013000300009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Blood steers feed efficiency parameters rumen environment
spellingShingle	Blood steers feed efficiency parameters rumen environment Arelovich,Hugo M Bravo,Rodrigo D Martinez,Marcela F Forgue,Pedro L Torquati,Sergio O Performance and ultrasound measurements of beef cattle fed diets based on whole corn or oats grains
description	This study intended to contrast dietary effects of whole grain oats versus corn included in rations with moderate roughage content on animal performance, beef ultrasound measurements, rumen and blood parameters. Ten Aberdeen Angus steers (203 kg) in individual pens were fed twice daily on either whole oats (OD) or corn (CD) based diets. Measurements were: DM intake (DMI), average daily gain (ADG), feed to gain ratio (F/G); back fat (BF) and rib eye area (RA); blood parameters. Four cannulated steers were used to study rumen pH, NH3-N and grain degradability. Rations dietary components were 55% grain, 30.1% barley straw, and 10.6% whole soybeans. Despite calculated higher ME supply (P = 0.0887) no differences were found for DMI, ADG, or F/G. Metabolizable protein intake (19.4%) was larger and degradable protein intake (43.3%) smaller for CD compared with OD (P < 0.01). The growth rate (cm² d-1) for RA was 40% grater for OD, but larger BF deposition (P = 0.0787) was found for CD. Blood Mg was higher for OD (p = 0.0564), nevertheless other blood parameters remained unaffected. Rumen pH and NH3-N were not influenced by diet, variations were only observed within time periods. Rumen pH decreased linearly from 7.05 to 6.13 and 7.11 to 6.37 for OD and CD respectively (P < 0.05). Minimum NH3-N concentrations (mg dL-1) were reached 12 and 18 h after morning meal for OD (7.10) and CD (5.82) respectively. Rumen degradation was larger for oats than corn. Whole oats rather than corn fed up to 55% of total DM seems to improve protein deposition, without significant changes in animal performance, rumen environment or blood parameters.
author	Arelovich,Hugo M Bravo,Rodrigo D Martinez,Marcela F Forgue,Pedro L Torquati,Sergio O
author_facet	Arelovich,Hugo M Bravo,Rodrigo D Martinez,Marcela F Forgue,Pedro L Torquati,Sergio O
author_sort	Arelovich,Hugo M
title	Performance and ultrasound measurements of beef cattle fed diets based on whole corn or oats grains
title_short	Performance and ultrasound measurements of beef cattle fed diets based on whole corn or oats grains
title_full	Performance and ultrasound measurements of beef cattle fed diets based on whole corn or oats grains
title_fullStr	Performance and ultrasound measurements of beef cattle fed diets based on whole corn or oats grains
title_full_unstemmed	Performance and ultrasound measurements of beef cattle fed diets based on whole corn or oats grains
title_sort	performance and ultrasound measurements of beef cattle fed diets based on whole corn or oats grains
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000300009
work_keys_str_mv	AT arelovichhugom performanceandultrasoundmeasurementsofbeefcattlefeddietsbasedonwholecornoroatsgrains AT bravorodrigod performanceandultrasoundmeasurementsofbeefcattlefeddietsbasedonwholecornoroatsgrains AT martinezmarcelaf performanceandultrasoundmeasurementsofbeefcattlefeddietsbasedonwholecornoroatsgrains AT forguepedrol performanceandultrasoundmeasurementsofbeefcattlefeddietsbasedonwholecornoroatsgrains AT torquatisergioo performanceandultrasoundmeasurementsofbeefcattlefeddietsbasedonwholecornoroatsgrains
_version_	1714205325814398976

Performance and ultrasound measurements of beef cattle fed diets based on whole corn or oats grains

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