Comparison of Four Techniques to Estimate Forage Intake by Rams Grazing on a Panicum coloratum L. Pasture

The estimation of daily feed intake is important in the determination of animal production The objective of this experiment was to compare measurements of animal forage intake obtained by the use of four techniques: pre- and post-grazing difference in standing forage mass, total daily feces collecti...

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Autores principales:	Ferri,Carlos M, Stritzler,Néstor P, Brizuela,Miguel A, Pagella,Horacio J
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2008
Materias:	C4 grass fecal nitrogen forage intake n-alkanes
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000300004
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spelling	oai:scielo:S0718-583920080003000042018-10-01Comparison of Four Techniques to Estimate Forage Intake by Rams Grazing on a Panicum coloratum L. PastureFerri,Carlos MStritzler,Néstor PBrizuela,Miguel APagella,Horacio J C4 grass fecal nitrogen forage intake n-alkanes The estimation of daily feed intake is important in the determination of animal production The objective of this experiment was to compare measurements of animal forage intake obtained by the use of four techniques: pre- and post-grazing difference in standing forage mass, total daily feces collection in combination with in vitro diet digestibility, total daily feces collection in combination with diet digestibility estimated by the fecal nitrogen index and the n-alkane technique. The experiment was carried out on a stockpiled Panicum coloratum L. pasture during two growing seasons. The treatments for the first season comprised standing forage mass accumulated after mid-October, mid-January and mid-February mechanical harvest to 8-cm stubble. In the second season, the treatments came from forage mass accumulated after mid-December, early January and February cuttings. Treatments were assigned at random to 0.5 ha plots in two replicates. The most closely correlated estimations of intake (r = 0.83; P < 0.01) were those obtained through total collection of feces and diet digestibility and the least with either the in vitro technique or the fecal N index. The apparent overestimation of intake by the n-alkane technique might be a consequence of the bias produced by forage sampling. In general terms, the techniques used to estimate intake were responsive to treatment effect.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.68 n.3 20082008-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000300004en10.4067/S0718-58392008000300004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	C4 grass fecal nitrogen forage intake n-alkanes
spellingShingle	C4 grass fecal nitrogen forage intake n-alkanes Ferri,Carlos M Stritzler,Néstor P Brizuela,Miguel A Pagella,Horacio J Comparison of Four Techniques to Estimate Forage Intake by Rams Grazing on a Panicum coloratum L. Pasture
description	The estimation of daily feed intake is important in the determination of animal production The objective of this experiment was to compare measurements of animal forage intake obtained by the use of four techniques: pre- and post-grazing difference in standing forage mass, total daily feces collection in combination with in vitro diet digestibility, total daily feces collection in combination with diet digestibility estimated by the fecal nitrogen index and the n-alkane technique. The experiment was carried out on a stockpiled Panicum coloratum L. pasture during two growing seasons. The treatments for the first season comprised standing forage mass accumulated after mid-October, mid-January and mid-February mechanical harvest to 8-cm stubble. In the second season, the treatments came from forage mass accumulated after mid-December, early January and February cuttings. Treatments were assigned at random to 0.5 ha plots in two replicates. The most closely correlated estimations of intake (r = 0.83; P < 0.01) were those obtained through total collection of feces and diet digestibility and the least with either the in vitro technique or the fecal N index. The apparent overestimation of intake by the n-alkane technique might be a consequence of the bias produced by forage sampling. In general terms, the techniques used to estimate intake were responsive to treatment effect.
author	Ferri,Carlos M Stritzler,Néstor P Brizuela,Miguel A Pagella,Horacio J
author_facet	Ferri,Carlos M Stritzler,Néstor P Brizuela,Miguel A Pagella,Horacio J
author_sort	Ferri,Carlos M
title	Comparison of Four Techniques to Estimate Forage Intake by Rams Grazing on a Panicum coloratum L. Pasture
title_short	Comparison of Four Techniques to Estimate Forage Intake by Rams Grazing on a Panicum coloratum L. Pasture
title_full	Comparison of Four Techniques to Estimate Forage Intake by Rams Grazing on a Panicum coloratum L. Pasture
title_fullStr	Comparison of Four Techniques to Estimate Forage Intake by Rams Grazing on a Panicum coloratum L. Pasture
title_full_unstemmed	Comparison of Four Techniques to Estimate Forage Intake by Rams Grazing on a Panicum coloratum L. Pasture
title_sort	comparison of four techniques to estimate forage intake by rams grazing on a panicum coloratum l. pasture
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000300004
work_keys_str_mv	AT ferricarlosm comparisonoffourtechniquestoestimateforageintakebyramsgrazingonapanicumcoloratumlpasture AT stritzlernestorp comparisonoffourtechniquestoestimateforageintakebyramsgrazingonapanicumcoloratumlpasture AT brizuelamiguela comparisonoffourtechniquestoestimateforageintakebyramsgrazingonapanicumcoloratumlpasture AT pagellahoracioj comparisonoffourtechniquestoestimateforageintakebyramsgrazingonapanicumcoloratumlpasture
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Comparison of Four Techniques to Estimate Forage Intake by Rams Grazing on a Panicum coloratum L. Pasture

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