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dc.contributor.advisorWickersham, Tryon A
dc.contributor.advisorLeatherwood, Jessica L
dc.creatorGoehring, Mallory Sherrill
dc.date.accessioned2018-02-05T21:22:07Z
dc.date.available2019-08-01T06:53:34Z
dc.date.created2017-08
dc.date.issued2017-08-07
dc.date.submittedAugust 2017
dc.identifier.urihttps://hdl.handle.net/1969.1/166068
dc.description.abstractNineteen Quarter horse geldings (466 to 697 kg BW; 9 to 18 yr age) were used in a randomized design to determine the difference in nutrient utilization of either pelleted or extruded concentrate. Horses were randomly assigned to one of two treatments: a pelleted diet (PEL; n = 10) or an extruded diet (EXT; n = 9, Life Plus, Muenster Milling, LLC, Muenster, TX). Diets were formulated to be isocaloric and isonitrogenous with 8% fat and 14% protein, respectively. Dietary treatments were fed at 0.5% BW (as fed) daily, and all horses received 1.5% BW coastal bermudagrass (Cynodon dactylon) hay (as fed) daily. Horses were fed at 0630 and 1830 h daily, and refusals (ORTs) were collected and weighed 3 h after feeding. The first 14-d were used as a dietary adaptation period, followed by 4-d total fecal collection. Fecal samples were collected from fecal harnesses (Bun-bag, Sagle, ID) every 6 h, weighed, homogenized, and subsampled. Additionally, concentrate rate of intake was measured over 5 feedings and averaged to determine kg consumed/min. Data were analyzed using PROC MIXED procedure of SAS. Concentrate rate of intake was influenced by treatment (P = 0.05) with PEL eating at 0.16 kg/min and EXT eating at 0.13 kg/min. Concentrate dry matter intake was greater (P = 0.02) for EXT than PEL (0.46 and 0.44%, respectively) this difference resulted from a higher DM content for the EXT than the PEL. There were also no differences in hay intake (P = 0.70), total dry matter intake (P = 0.99), digestible dry mater intake (P = 0.17), or starch intake (P = 0.62). Dry matter digestion was greater (P = 0.03) for PEL at 51% compared to 48% for EXT. In accordance, organic matter digestion followed a similar response (P = 0.03) with digestibilities of 51% and 48% for PEL and EXT, respectively. Starch digestion was greater (P = 0.02) for PEL 90% compared to 87% for EXT and GE digestion was influenced by treatment (P = 0.03) with PEL being higher than EXT. In conclusion, digestion and rate of intake was decreased by extrusion feed processing.en
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.subjectEquineen
dc.subjectExtrusionen
dc.subjectDigestionen
dc.titleEffect of Extrusion Feed Processing on Equine Digestionen
dc.typeThesisen
thesis.degree.departmentAnimal Scienceen
thesis.degree.disciplineAnimal Scienceen
thesis.degree.grantorTexas A & M Universityen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelMastersen
dc.contributor.committeeMemberWelsh, Jr., Thomas H
dc.contributor.committeeMemberSarah, White H
dc.type.materialtexten
dc.date.updated2018-02-05T21:22:07Z
local.embargo.terms2019-08-01
local.etdauthor.orcid0000-0002-1650-6052


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