{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,6]],"date-time":"2026-01-06T13:16:08Z","timestamp":1767705368014},"reference-count":42,"publisher":"Cambridge University Press (CUP)","issue":"2","license":[{"start":{"date-parts":[[2007,3,9]],"date-time":"2007-03-09T00:00:00Z","timestamp":1173398400000},"content-version":"unspecified","delay-in-days":2046,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Br J Nutr"],"published-print":{"date-parts":[[2001,8]]},"abstract":"<jats:p>The role of the gastrointestinal tract (GIT) in explaining the less efficient utilization of metabolizable energy (ME) in growing lambs fed forage rather than concentrate-based diets was investigated by feeding forage (legume\u2013grass silage) and concentrate (whole shelled maize) diets, at isoenergetic intakes (ME basis), using five groups of lambs. One group of seven lambs was an initial slaughter group and of the two groups (eight lambs per group) fed each diet, one group was fed for 8 weeks, whereas the other group was fed for 16 weeks. All lambs were slaughtered between 18\u00b75 and 20 h following their last meal. Retained energy (as a percentage of ME intake) was higher (concentrate-fed 28, forage-fed 17;<jats:italic>P<\/jats:italic>&lt;0\u00b7001) for the concentrate-fed animals. Weight-specific mucosal O<jats:sub>2<\/jats:sub>uptake (ml\/g DM per h), measured<jats:italic>in vitro<\/jats:italic>, was 37 % higher for the forestomach (reticulum, rumen and omasum) and small intestine (jejunum) than for the abomasum and large intestine (caecum and colon), but there was no evidence for a diet effect (except colon; forage-fed 5\u00b73, concentrate-fed 4\u00b72;<jats:italic>P<\/jats:italic>=0\u00b7036). Total GIT heat loss was estimated as 14 (forage-fed) and 18 (concentrate-fed) % of the whole-body heat loss. Although the GIT did not contribute to increased thermogenesis in the forage-fed lambs in the present study, greater relative contribution of GIT tissue to whole-body mass, i.e. GIT as a percentage of empty-body weight(forage 7\u00b76, concentrate 6\u00b76;<jats:italic>P<\/jats:italic>&lt;0\u00b7001) in the forage-fed animals supports a role for the GIT in contributing to higher thermogenesis observed in ruminants fed forage as opposed to concentrate diets.<\/jats:p>","DOI":"10.1079\/bjn2001393","type":"journal-article","created":{"date-parts":[[2008,5,15]],"date-time":"2008-05-15T16:14:36Z","timestamp":1210868076000},"page":"257-264","source":"Crossref","is-referenced-by-count":5,"title":["The role of gut tissue in the energy metabolism of growing lambs fed forage or concentrate diets"],"prefix":"10.1017","volume":"86","author":[{"given":"Esther J.","family":"Finegan","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jock G.","family":"Buchanan-Smith","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brian W.","family":"McBride","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2007,3,9]]},"reference":[{"key":"S0007114501001672_ref036","doi-asserted-by":"publisher","DOI":"10.1079\/PNS19900026"},{"key":"S0007114501001672_ref012","doi-asserted-by":"publisher","DOI":"10.1079\/BJN19890005"},{"key":"S0007114501001672_ref004","volume-title":"Official Methods of Analysis","year":"1990"},{"key":"S0007114501001672_ref032","doi-asserted-by":"crossref","first-page":"3","DOI":"10.18174\/njas.v22i1.17230","article-title":"Total N determination in plant material by means of the indophenol blue method","volume":"22","author":"Novozamsky","year":"1974","journal-title":"Netherlands Journal of Agricultural Science"},{"key":"S0007114501001672_ref003","doi-asserted-by":"publisher","DOI":"10.1079\/BJN19570063"},{"key":"S0007114501001672_ref040","first-page":"123","volume-title":"The Analysis of Dietary Fiber in Food","author":"Robertson","year":"1981"},{"key":"S0007114501001672_ref008","doi-asserted-by":"publisher","DOI":"10.4141\/cjas78-088"},{"key":"S0007114501001672_ref039","doi-asserted-by":"publisher","DOI":"10.1093\/jn\/121.7.994"},{"key":"S0007114501001672_ref019","doi-asserted-by":"publisher","DOI":"10.1093\/jn\/102.8.1093"},{"key":"S0007114501001672_ref037","doi-asserted-by":"publisher","DOI":"10.1079\/BJN19930163"},{"key":"S0007114501001672_ref001","volume-title":"Energy and Protein Requirements of Ruminants","year":"1993"},{"key":"S0007114501001672_ref015","doi-asserted-by":"publisher","DOI":"10.1016\/0003-2697(74)90261-9"},{"key":"S0007114501001672_ref017","first-page":"250","volume-title":"The Ruminant Animal","author":"Hofmann","year":"1988"},{"key":"S0007114501001672_ref009","doi-asserted-by":"publisher","DOI":"10.4141\/cjas81-081"},{"key":"S0007114501001672_ref033","doi-asserted-by":"publisher","DOI":"10.3168\/jds.S0022-0302(83)81897-9"},{"key":"S0007114501001672_ref023","doi-asserted-by":"publisher","DOI":"10.4141\/cjas93-088"},{"key":"S0007114501001672_ref038","doi-asserted-by":"publisher","DOI":"10.2527\/1991.6983389x"},{"key":"S0007114501001672_ref020","doi-asserted-by":"publisher","DOI":"10.1093\/jn\/120.6.649"},{"key":"S0007114501001672_ref027","doi-asserted-by":"publisher","DOI":"10.1079\/BJN19850070"},{"key":"S0007114501001672_ref014","doi-asserted-by":"publisher","DOI":"10.1002\/jsfa.2740430102"},{"key":"S0007114501001672_ref011","doi-asserted-by":"publisher","DOI":"10.1079\/BJN19900044"},{"key":"S0007114501001672_ref010","doi-asserted-by":"publisher","DOI":"10.1093\/jn\/100.2.262"},{"key":"S0007114501001672_ref006","doi-asserted-by":"crossref","first-page":"535","DOI":"10.1016\/S0021-9258(18)51379-X","article-title":"The colorimetric determination of lactic acid in biological material","volume":"138","author":"Barker","year":"1941","journal-title":"Journal of Biological Chemistry"},{"key":"S0007114501001672_ref022","first-page":"123","article-title":"Oxygen consumption and the energy costs of Na+-transport in the rumen of Holstein\u2013Friesian steers","volume":"51","author":"Kelly","year":"1991","journal-title":"Proceedings of the New Zealand Society of Animal Production"},{"key":"S0007114501001672_ref025","first-page":"107","volume-title":"Energy Metabolism of Farm Animals, European Association for Animal Production. 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