Relationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes
8 páginas, 4 tablas.
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | artículo biblioteca |
| Language: | English |
| Published: |
American Society of Animal Science
2011
|
| Subjects: | Cattle, Chewing behavior, Digestibility, Forage intake, Retention time, |
| Online Access: | http://hdl.handle.net/10261/45862 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
dig-igm-es-10261-45862 |
|---|---|
| record_format |
koha |
| spelling |
dig-igm-es-10261-458622021-03-18T16:23:38Z Relationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes Dias, R. S. Patino, H. O. López, Secundino Prates, E. Swanson, K. C. France, J. Cattle Chewing behavior Digestibility Forage intake Retention time 8 páginas, 4 tablas. The objective of this study was to evaluate the relationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes. Four Hereford steers, with an initial average BW of 136 kg, were used in an experiment conducted as a balanced 4 × 4 Latin square with 4 treatments (levels of intake) and 4 periods. Animals were fed lopsided oat hay (Avena strigosa Schreb.) at 4 levels of intake (as a percentage of BW): 1.5, 2.0, 2.5, and ad libitum. Digestibility, chewing behavior, and digesta passage kinetic measurements were recorded during the experimental period. Chewing rates during eating and ruminating [(chews∙min−1)/g of DMI∙kg−1 of BW∙d−1] decreased (P = 0.018 and P = 0.032, respectively) with increased DMI (g∙kg−1 of BW∙d−1), whereas total chewing and total time spent on each chewing activity increased. Calculated total energy expended by the chewing activity was 4.2, 4.4, 5.2, and 5.3% of ME intake for DMI of 1.5, 2.0, and 2.5% of BW and ad libitum, respectively, indicating that adjustments in animal chewing behavior may be a mechanism of reducing energy expenditure when forages are fed at restricted intake. Hay digestibility decreased (P < 0.001) with increased DMI (r = −0.865). Digesta mean retention time (h) was strongly correlated with DMI (r = −0.868) and OM digestibility (r = 0.844). At reduced intake, hay digestibility was enhanced (P < 0.001) by extending digesta retention time and by increasing chewing efficiency, highlighting the relationship between chewing behavior and the digestive process. Fractional outflow rate of particulate matter from the reticulorumen (k1) was positively correlated with total chews, emphasizing that the decrease in particle size caused by chewing facilitates particle flow through the digestive tract. Increased hay intake also increased (P < 0.001) k1, whereas passage rate of the liquid phase, transit time, and rumen fill were not affected (P > 0.05). The latter was correlated with rumen volume (r = 0.803). In conclusion, the results of this study indicate that animals fed at restricted intake increased chewing rate when eating and ruminating, which, along with a longer digesta retention time, contributed to enhance feed digestibility. Peer reviewed 2012-02-17T12:56:58Z 2012-02-17T12:56:58Z 2011 artículo http://purl.org/coar/resource_type/c_6501 Journal of Animal Science 89 (6): 1873-1880 (2011) 0021-8812 http://hdl.handle.net/10261/45862 10.2527/jas.2010-3156 en http://dx.doi.org/10.2527/jas.2010-3156 none American Society of Animal Science |
| institution |
IGM ES |
| collection |
DSpace |
| country |
España |
| countrycode |
ES |
| component |
Bibliográfico |
| access |
En linea |
| databasecode |
dig-igm-es |
| tag |
biblioteca |
| region |
Europa del Sur |
| libraryname |
Biblioteca del IGM España |
| language |
English |
| topic |
Cattle Chewing behavior Digestibility Forage intake Retention time Cattle Chewing behavior Digestibility Forage intake Retention time |
| spellingShingle |
Cattle Chewing behavior Digestibility Forage intake Retention time Cattle Chewing behavior Digestibility Forage intake Retention time Dias, R. S. Patino, H. O. López, Secundino Prates, E. Swanson, K. C. France, J. Relationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes |
| description |
8 páginas, 4 tablas. |
| format |
artículo |
| topic_facet |
Cattle Chewing behavior Digestibility Forage intake Retention time |
| author |
Dias, R. S. Patino, H. O. López, Secundino Prates, E. Swanson, K. C. France, J. |
| author_facet |
Dias, R. S. Patino, H. O. López, Secundino Prates, E. Swanson, K. C. France, J. |
| author_sort |
Dias, R. S. |
| title |
Relationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes |
| title_short |
Relationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes |
| title_full |
Relationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes |
| title_fullStr |
Relationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes |
| title_full_unstemmed |
Relationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes |
| title_sort |
relationships between chewing behavior, digestibility, and digesta passage kinetics in steers fed oat hay at restricted and ad libitum intakes |
| publisher |
American Society of Animal Science |
| publishDate |
2011 |
| url |
http://hdl.handle.net/10261/45862 |
| work_keys_str_mv |
AT diasrs relationshipsbetweenchewingbehaviordigestibilityanddigestapassagekineticsinsteersfedoathayatrestrictedandadlibitumintakes AT patinoho relationshipsbetweenchewingbehaviordigestibilityanddigestapassagekineticsinsteersfedoathayatrestrictedandadlibitumintakes AT lopezsecundino relationshipsbetweenchewingbehaviordigestibilityanddigestapassagekineticsinsteersfedoathayatrestrictedandadlibitumintakes AT pratese relationshipsbetweenchewingbehaviordigestibilityanddigestapassagekineticsinsteersfedoathayatrestrictedandadlibitumintakes AT swansonkc relationshipsbetweenchewingbehaviordigestibilityanddigestapassagekineticsinsteersfedoathayatrestrictedandadlibitumintakes AT francej relationshipsbetweenchewingbehaviordigestibilityanddigestapassagekineticsinsteersfedoathayatrestrictedandadlibitumintakes |
| _version_ |
1777663901931929600 |