Digestibility, intake and selectivity of three mixed-forage pastures by cattle

dc.contributor.authorThompson, Keith Patricken
dc.contributor.departmentAnimal Science (Ruminant Nutrition)en
dc.date.accessioned2018-03-26T19:54:08Zen
dc.date.available2018-03-26T19:54:08Zen
dc.date.issued1982en
dc.description.abstractA grazing trial was conducted to determine the relative value of three mixed-forage pastures, alfalfa-orchardgrass, bluegrass-white clover, and fescue-red clover. Three steers, three heifers and one esophageally cannulated steer were randomly assigned to each pasture treatment. Chemical composition, digestibility, voluntary intake, and selectivity of the forages were determined through use of esophageally cannulated steers and a rare earth marker (ytterbium). Forage intake appears to be most closely related to DM digestibility and content of the NDF and ADF fiber fractions. Some degree of forage selectivity was observed, although the specific species selected for and determinants of selectivity were not apparent. From the data obtained on levels of intake, digestibility and chemical composition, alfalfa-orchardgrass and bluegrass-white clover offer the highest quality forage of the three compared during the time of year studied. Fescue-red clover was consistently inferior in all respects. The digestible dry matter intake by cattle grazing alfalfa-orchardgrass, bluegrass-white clover and fescue-red clover was 3.2, 2.9 and 2.2 kg/d, respectively. More work needs to be done on a wider variety of pastures during different times of the grazing season.en
dc.description.degreeMaster of Scienceen
dc.format.extentiv, 52, [2] leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/82656en
dc.language.isoen_USen
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 9424630en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1982.T572en
dc.subject.lcshPasturesen
dc.subject.lcshCattle -- Feeding and feedsen
dc.titleDigestibility, intake and selectivity of three mixed-forage pastures by cattleen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineAnimal Science (Reproductive Physiology)en
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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