{"id":14972,"date":"2009-08-14T14:41:47","date_gmt":"2009-08-14T20:41:47","guid":{"rendered":"http:\/\/prairieswine.com\/rsc\/?p=14972"},"modified":"2013-08-14T14:47:59","modified_gmt":"2013-08-14T20:47:59","slug":"protein-turnover-and-heat-production-of-sows-varies-at-day-30-45-and-105-of-gestation-2","status":"publish","type":"post","link":"https:\/\/prairieswine.com\/rsc\/protein-turnover-and-heat-production-of-sows-varies-at-day-30-45-and-105-of-gestation-2\/","title":{"rendered":"Protein Turnover and Heat Production of Sows Varies at Day 30, 45 and 105 of Gestation"},"content":{"rendered":"<p>The objective of this study was to determine the protein turnover and heat production rate of sows at day 30, 45 and 105 of gestation.\u00a0Gravid sows (n=4) were fed 2.4 \u00b1 0.1 kg of a barley-wheat-SBM diet of 12.5 MJ ME\/kg, 0.65% total lysine, and 15% crude protein twice daily throughout gestation. Heat production was measured by indirect calorimetry and a primed-constant infusion of L-[1-13C]leucine (1.0 mg\/kg\/h) was simultaneously delivered intravenously over 24 h. All measurements were made at d 30, 45, and 105 of gestation. Respiratory quotient (RQ) was calculated to determine nutrient utilization. Energy retention (intake minus heat production) (MJ\/d) was greatest (P&lt;0.01) on d 45 (6.1 \u00b1 0.9) compared to d 30 (3.7 \u00b1 0.9) or d 105 (1.4 \u00b1 1.5) of gestation. The RQ was greater than 1 and highest on d 45 indicating lipogenesis. Leucine flux, appearance from breakdown, and incorporation into protein were highest (P&lt;0.0001) on d 45 compared to days 30 or 105 of gestation. However, as a result of the significant increase in protein breakdown (9.3 vs. 1.0 g\/d) protein gain was lower (P&lt;0.05) for sows on d 45 (165.2 g\/d) compared to d 30 (172.4 g\/d and). Therefore, energy was preferentially stored by these sows on d 45 at the expense of protein.\u00a0The correct utilization of phase feeding would improve productivity and provide positive economic returns.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The objective of this study was to determine the protein turnover and heat production rate of sows at day 30, 45 and 105 of gestation.\u00a0Gravid sows (n=4) were fed 2.4 \u00b1 0.1 kg of a barley-wheat-SBM diet of 12.5 MJ ME\/kg, 0.65% total lysine, and 15% crude protein twice daily throughout gestation. Heat production was [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18120,19],"tags":[46,108,102,23138,1053,104,18011,934],"class_list":["post-14972","post","type-post","status-publish","format-standard","hentry","category-ontario-pork","category-pork-insight-articles","tag-feed","tag-feeding","tag-gestation","tag-lux","tag-phase-feeding","tag-sow","tag-tot","tag-wheat"],"_links":{"self":[{"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/14972","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/comments?post=14972"}],"version-history":[{"count":1,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/14972\/revisions"}],"predecessor-version":[{"id":14974,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/14972\/revisions\/14974"}],"wp:attachment":[{"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/media?parent=14972"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/categories?post=14972"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/tags?post=14972"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}