- -

Effects of the correction of particle microbial contamination and particle transit model in the rumen on in situ protein evaluation of grass hays

RiuNet: Institutional repository of the Polithecnic University of Valencia

Share/Send to

Cited by

Statistics

Effects of the correction of particle microbial contamination and particle transit model in the rumen on in situ protein evaluation of grass hays

Show simple item record

Files in this item

dc.contributor.author Guevara-Gonzalez, J. A. es_ES
dc.contributor.author Gonzalez, J. es_ES
dc.contributor.author Arroyo, J. M. es_ES
dc.contributor.author Moya, V.J. es_ES
dc.contributor.author Piquer Querol, Olga es_ES
dc.date.accessioned 2016-09-14T12:02:18Z
dc.date.available 2016-09-14T12:02:18Z
dc.date.issued 2012
dc.identifier.issn 1836-0939
dc.identifier.uri http://hdl.handle.net/10251/69495
dc.description.abstract Effects of considering the particle comminution rate (k(c)) in addition to particle rumen outflow (k(p)) and the ruminal microbial contamination on estimates of by-pass and intestinal digestibility of DM, organic matter and crude protein were examined in perennial ryegrass and oat hays. By-pass k(c)-k(p)-based values of amino acids were also determined. This study was performed using particle transit, in situ and N-15 techniques on three rumen and duodenum-cannulated wethers. The above estimates were determined using composite samples from rumen-incubated residues representative of feed by-pass. Considering the comminution rate, k(c), modified the contribution of the incubated residues to these samples in both hays and revealed a higher microbial contamination, consistently in oat hay and only as a tendency for crude protein in ryegrass hay. Not considering k(c) or rumen microbial contamination overvalued by-pass and intestinal digestibility in both hays. Therefore, non-microbial-corrected k(p)-based values of intestinal digested crude protein were overestimated as compared with corrected and k(c)-k(p)-based values in ryegrass hay (17.4 vs 4.40%) and in oat hay (5.73 vs 0.19%). Both factors should be considered to obtain accurate in situ estimates in grasses, as the protein value of grasses is very conditioned by the microbial synthesis derived from their ruminal fermentation. Consistent overvaluations of amino acid by-pass due to not correcting microbial contamination were detected in both hays, with large variable errors among amino acids. A similar degradation pattern of amino acids was recorded in both hays. Cysteine, methionine, leucine and valine were the most degradation-resistant amino acids. es_ES
dc.description.sponsorship This work has been supported by the CICYT-funded Project AGL 2006-08300. Analyses of <SUP>15</SUP>N isotope ratios were performed at the Servicio Interdepartamental de Investigacion, Universidad Autonoma de Madrid, Spain. en_EN
dc.language Inglés es_ES
dc.publisher CSIRO Publishing es_ES
dc.relation CICYT AGL 2006-08300 es_ES
dc.relation.ispartof Animal Production Science es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject INTESTINAL DIGESTIBILITY es_ES
dc.subject FEED PROTEIN es_ES
dc.subject AMINO-ACIDS es_ES
dc.subject DEGRADABILITY es_ES
dc.subject DEGRADATION es_ES
dc.subject RUMINANTS es_ES
dc.subject ACCURACY es_ES
dc.subject BACTERIA es_ES
dc.subject PASSAGE es_ES
dc.subject MARKER es_ES
dc.title Effects of the correction of particle microbial contamination and particle transit model in the rumen on in situ protein evaluation of grass hays es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1071/AN11320
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ciencia Animal - Departament de Ciència Animal es_ES
dc.description.bibliographicCitation Guevara-Gonzalez, JA.; Gonzalez, J.; Arroyo, JM.; Moya, V.; Piquer Querol, O. (2012). Effects of the correction of particle microbial contamination and particle transit model in the rumen on in situ protein evaluation of grass hays. Animal Production Science. 53(2):134-141. doi:10.1071/AN11320 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1071/AN11320 es_ES
dc.description.upvformatpinicio 134 es_ES
dc.description.upvformatpfin 141 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 53 es_ES
dc.description.issue 2 es_ES
dc.relation.senia 234730 es_ES


This item appears in the following Collection(s)

Show simple item record