Soybean Hulls as an Alternative Feed for Horses

dc.contributor.author Booth, Josie
dc.contributor.author Tyler, Howard
dc.contributor.author Miller-Auwerda, Peggy
dc.contributor.author Moore, Jeanette
dc.date 2018-08-25T18:51:49.000
dc.date.accessioned 2020-06-29T23:29:01Z
dc.date.available 2020-06-29T23:29:01Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2004
dc.date.issued 2004-01-01
dc.description.abstract <p>Soybean hulls (SH) have been successfully fed to ruminant animals as an economical substitute for hay. This feedstuff is a source of highly digestible fiber and does not contain starch. The purpose of this trial was to evaluate SH as a replacement fiber in horse diets. Four cecally cannulated Quarter Horse geldings, aged 6 to 10 years and averaging 502 kg, were used in a 4x4 Latin Square design with 21-day periods. Diets consisted of alfalfa-bromegrass hay (14.4% CP, 58.1% NDF, 39.1% ADF) with the addition of either 0, 25, 50, or 75% unpelleted SH (13.1% CP, 60.6% NDF, 43.7% ADF). Diets were offered at 2% of bodyweight (as fed) daily and body weights were measured weekly. Cecal samples (90-min post-feeding) and total fecal collections (3 d) were taken at the end of each treatment period. Fecal collection bags were emptied every 6 hours and 10% of the total amount was frozen for later analysis. Total cecal VFA production increased linearly from 70 mM to 109 mM as proportions of SH in diets increased (P = 0.02). Proportions of propionate increased linearly (P < 0.01) and cubically (P = 0.03) with means of 15.7, 18.0, 16.6, and 21.9 moles per 100 moles total VFA for the 0, 25, 50, and 75% SH diets respectively. Proportions of butyrate decreased linearly (P < 0.01) from 5.3 to 3.9 moles per 100 moles total VFA. The acetate to propionate ratio decreased linearly (P = 0.02) and cubically (P = 0.03) with means of 4.9, 4.2, 4.9, and 3.3. Apparent digestibility of DM, OM, NDF, ADF, cellulose, and hemicellulose did not differ (P > 0.24) with treatment. Apparent digestibility of N decreased linearly (P < 0.01) as concentrations of SH increased in the diet, most likely due to increased cecal fermentation and microbial biomass production. Cecal pH decreased linearly (P = 0.01) from 7.00 to 6.45 as the level of SH increased, but there was no change (P linear = 0.68) for cecal ammonia (mean concentration of 3.85 mM). Soybean hulls appear to stimulate cecal fermentation and to be a suitable replacement for hay in equine diets. This may be an especially important finding for owners of geriatric horses that often have difficulty consuming roughages.</p>
dc.identifier archive/lib.dr.iastate.edu/ans_air/vol650/iss1/90/
dc.identifier.articleid 1090
dc.identifier.contextkey 3310981
dc.identifier.doi https://doi.org/10.31274/ans_air-180814-593
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ans_air/vol650/iss1/90
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/8188
dc.language.iso en
dc.relation.ispartofseries Animal Science Research Reports
dc.relation.ispartofseries ASL R1931
dc.source.bitstream archive/lib.dr.iastate.edu/ans_air/vol650/iss1/90/AS1931.pdf|||Sat Jan 15 02:26:29 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Animal Sciences
dc.subject.keywords ASL R1931
dc.title Soybean Hulls as an Alternative Feed for Horses
dc.type article
dc.type.genre equine
dspace.entity.type Publication
relation.isJournalIssueOfPublication 3f2790ae-9c11-4703-87e0-39b318362bbc
relation.isSeriesOfPublication 7f3839b7-b833-4418-a6fa-adda2b23950a
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