{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,18]],"date-time":"2026-01-18T07:29:01Z","timestamp":1768721341640,"version":"3.49.0"},"reference-count":39,"publisher":"Oxford University Press (OUP)","license":[{"start":{"date-parts":[[2024,5,27]],"date-time":"2024-05-27T00:00:00Z","timestamp":1716768000000},"content-version":"vor","delay-in-days":147,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,1,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>The objective was to determine the effects of induced acidosis in the late-finishing phase on rumen fermentation in feedlot steers. Eleven ruminally cannulated steers (body weight [BW]\u2005=\u2005795 kg\u2005\u00b1\u200554) were blocked into two groups based on initial BW. For 195 d prior to the start of the study, cattle were consuming a basal finishing diet (60% dry-rolled corn, 15% modified distillers grains, 15% corn silage, and 10% ground corn-based supplement). Steers were randomly assigned to one of the two treatments: control (CON), or induced acidosis (ACD). Both treatments were fasted for 24\u00a0h then fed the basal finishing diet. Steers on the ACD treatment received 0.05% of BW of wheat starch via rumen cannula at 0800 and 2000 hours on day 1 and ad libitum refeeding following the fast. On days 1 and 2, CON steers were provided 25% of allotted feed every 6\u00a0h. Rumen fluid was collected every 4\u00a0h during the challenge period (hours 0 to 48), and 0, 6, and 12\u00a0h after feeding during the recovery period (hours 54 to 96). Rumen fluid was analyzed for pH, ammonia, volatile fatty acids (VFA), and lactate. Fecal grab samples were collected every 8\u00a0h to determine fecal pH. A treatment\u2005\u00d7\u2005day interaction (P\u2005=\u20050.03) was observed for dry matter intake during the challenge period with steers on the ACD treatments consuming more on day 1 than CON steers. Intake was not different on day 2 (P\u2005=\u20050.88). A treatment\u2005\u00d7\u2005hour effect (P\u2005&amp;lt;\u20050.01) was observed for ruminal pH during the challenge period with the ACD steers having a lesser pH than CON from hours 12 to 32. Duration of time below a pH of 5.6 during the challenge period was greater (P\u2005&amp;lt;\u20050.01) for ACD steers than CON. During the challenge period, a treatment\u2005\u00d7\u2005time interaction (P\u2005=\u20050.04) was observed for total VFA concentration with ACD steers having greater total VFA concentration from hours 12 to 36. Acetate to propionate ratio (A:P) was affected by treatment\u2005\u00d7\u2005hour (P\u2005=\u20050.04) with CON steers having greater A:P from hours 28 to 48. Rumen ammonia and lactate concentrations did not differ (P\u2005\u2265\u20050.25) between treatments or the interaction with time. Challenge and recovery period fecal pH were not affected (P\u2005\u2265\u20050.13) by treatment, time, or their interaction. Recovery period ruminal pH was not different (P\u2005=\u20050.99) between treatments. For the recovery period, total VFA and ammonia concentration were not affected by treatment, time, or their interaction (P\u2005\u2265\u20050.07). Ruminal pH and VFA were affected in the initial 48\u00a0h of induced acidosis in the late-finishing phase.<\/jats:p>","DOI":"10.1093\/tas\/txae084","type":"journal-article","created":{"date-parts":[[2024,5,25]],"date-time":"2024-05-25T04:40:10Z","timestamp":1716612010000},"source":"Crossref","is-referenced-by-count":2,"title":["Effect of acidosis in the late-finishing phase on rumen fermentation in feedlot steers"],"prefix":"10.1093","volume":"8","author":[{"given":"Haley F","family":"Linder","sequence":"first","affiliation":[{"name":"Department of Animal Sciences, University of Illinois Urbana-Champaign , Urbana, IL 61801 , USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Larry L","family":"Berger","sequence":"additional","affiliation":[{"name":"Department of Animal Sciences, University of Illinois Urbana-Champaign , Urbana, IL 61801 , USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1305-8098","authenticated-orcid":false,"given":"Joshua C","family":"McCann","sequence":"additional","affiliation":[{"name":"Department of Animal Sciences, University of Illinois Urbana-Champaign , Urbana, IL 61801 , USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2024,5,27]]},"reference":[{"key":"2024060110163717600_CIT0001","doi-asserted-by":"crossref","first-page":"1447","DOI":"10.3168\/jds.S0022-0302(97)76074-0","article-title":"Relationship between fermentation acid production in the rumen and the requirement for physically effective fiber","volume":"80","author":"Allen","year":"1997","journal-title":"J. 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