{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/83555"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/83555","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Branched -Chain Amino Acid Nutrition of Grow-Finish Pigs and Young Chicks","abstract":"Three bioassays and two digestibility trials were conducted to determine the true digestible isoleucine (Ile) requirement for maximal weight gain and minimal plasma urea-nitrogen (PUN) of growing (25 to 45 kg) pigs. An Ile-deficient basal diet (0.30% true digestible Ile) utilizing red blood cells (RBC) was developed and validated. Digestibility of Ile in the RBC product was determined in both cecectomized roosters and ileal-cannulated pigs and found to be 97%. Broken-line analysis of dose titrations of Ile (0.38 to 0.58% true digestible Ile) suggested a true digestible Ile requirement of 0.50% for growing pigs. Minimal plasma urea-nitrogen levels in the blood agreed with results of the growth assay, suggesting that growing pigs between 25 and 45 kg require an estimated 0.50% true digestible Ile in the diet, or 1.46 g/Mcal ME, for maximal weight gain and minimal PUN. A second project examined the true digestible Ile requirement of high-lean-gain, late-finishing pigs, utilizing maximal weight gain and minimal PUN as response parameters. True digestibility of Ile in the basal diet was calculated to be 88%, based on the 97% true digestibility value obtained for Ile in RBC, together with true Ile digestibility values for corn and soybean meal. Maximal weight gain and minimal PUN responses to incremental Ile suggested a true digestible Ile requirement estimate of 0.31%, or 0.89 g/Mcal ME for high-lean-gain, late-finishing pigs. The third project evaluated the ideal ratios of Ile and valine (Val) relative to lysine (Lys) in chicks during the second and third week of life. A basal diet deficient in Lys, Ile and Val was formulated utilizing corn-gluten meal (CGM). Six dose levels of each AA were fed in three different experiments. Quadratic responses to each AA occurred when graded levels of digestible Lys (0.68 to 1.28%), Ile (0.45 to 0.95%) or Val (0.51 to 1.06%) were fed. Breakpoint requirement estimates for gain and gain:feed, respectively, were: Lys (0.85, 0.96%), Ile (0.59, 0.58%), and Val (0.74, 0.74%). Using the higher of broken-line requirement estimates for gain and gain:feed, ideal ratios (as a % of Lys) were: Lys (100), Ile (61.6) and Val (77.8).","abstract_html":"Three bioassays and two digestibility trials were conducted to determine the true digestible isoleucine (Ile) requirement for maximal weight gain and minimal plasma urea-nitrogen (PUN) of growing (25 to 45 kg) pigs. An Ile-deficient basal diet (0.30% true digestible Ile) utilizing red blood cells (RBC) was developed and validated. Digestibility of Ile in the RBC product was determined in both cecectomized roosters and ileal-cannulated pigs and found to be 97%. Broken-line analysis of dose titrations of Ile (0.38 to 0.58% true digestible Ile) suggested a true digestible Ile requirement of 0.50% for growing pigs. Minimal plasma urea-nitrogen levels in the blood agreed with results of the growth assay, suggesting that growing pigs between 25 and 45 kg require an estimated 0.50% true digestible Ile in the diet, or 1.46 g/Mcal ME, for maximal weight gain and minimal PUN. A second project examined the true digestible Ile requirement of high-lean-gain, late-finishing pigs, utilizing maximal weight gain and minimal PUN as response parameters. True digestibility of Ile in the basal diet was calculated to be 88%, based on the 97% true digestibility value obtained for Ile in RBC, together with true Ile digestibility values for corn and soybean meal. Maximal weight gain and minimal PUN responses to incremental Ile suggested a true digestible Ile requirement estimate of 0.31%, or 0.89 g/Mcal ME for high-lean-gain, late-finishing pigs. The third project evaluated the ideal ratios of Ile and valine (Val) relative to lysine (Lys) in chicks during the second and third week of life. A basal diet deficient in Lys, Ile and Val was formulated utilizing corn-gluten meal (CGM). Six dose levels of each AA were fed in three different experiments. Quadratic responses to each AA occurred when graded levels of digestible Lys (0.68 to 1.28%), Ile (0.45 to 0.95%) or Val (0.51 to 1.06%) were fed. Breakpoint requirement estimates for gain and gain:feed, respectively, were: Lys (0.85, 0.96%), Ile (0.59, 0.58%), and Val (0.74, 0.74%). Using the higher of broken-line requirement estimates for gain and gain:feed, ideal ratios (as a % of Lys) were: Lys (100), Ile (61.6) and Val (77.8).","abstract_has_math":false,"creators":["Parr, Theresa Margaret"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Animal Sciences","degree_department":null,"school":null,"contributors":["Baker, David H."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T21:08:09Z","date_published":"2015-09-25T21:08:09Z","updated_at":"2026-07-22T22:26:21Z","subjects":["Agriculture, Animal Culture and Nutrition"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3086156"],"render_values":[{"text":"(MiAaPQ)AAI3086156","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/83555","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Baker, David H."]},{"key":"dc:creator","label":"Author","values":["Parr, Theresa Margaret"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T21:08:09Z","10000-01-01","2003"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Animal Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Agriculture, Animal Culture and Nutrition"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/83555","(MiAaPQ)AAI3086156"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Three bioassays and two digestibility trials were conducted to determine the true digestible isoleucine (Ile) requirement for maximal weight gain and minimal plasma urea-nitrogen (PUN) of growing (25 to 45 kg) pigs. An Ile-deficient basal diet (0.30% true digestible Ile) utilizing red blood cells (RBC) was developed and validated. Digestibility of Ile in the RBC product was determined in both cecectomized roosters and ileal-cannulated pigs and found to be 97%. Broken-line analysis of dose titrations of Ile (0.38 to 0.58% true digestible Ile) suggested a true digestible Ile requirement of 0.50% for growing pigs. Minimal plasma urea-nitrogen levels in the blood agreed with results of the growth assay, suggesting that growing pigs between 25 and 45 kg require an estimated 0.50% true digestible Ile in the diet, or 1.46 g/Mcal ME, for maximal weight gain and minimal PUN. A second project examined the true digestible Ile requirement of high-lean-gain, late-finishing pigs, utilizing maximal weight gain and minimal PUN as response parameters. True digestibility of Ile in the basal diet was calculated to be 88%, based on the 97% true digestibility value obtained for Ile in RBC, together with true Ile digestibility values for corn and soybean meal. Maximal weight gain and minimal PUN responses to incremental Ile suggested a true digestible Ile requirement estimate of 0.31%, or 0.89 g/Mcal ME for high-lean-gain, late-finishing pigs. The third project evaluated the ideal ratios of Ile and valine (Val) relative to lysine (Lys) in chicks during the second and third week of life. A basal diet deficient in Lys, Ile and Val was formulated utilizing corn-gluten meal (CGM). Six dose levels of each AA were fed in three different experiments. Quadratic responses to each AA occurred when graded levels of digestible Lys (0.68 to 1.28%), Ile (0.45 to 0.95%) or Val (0.51 to 1.06%) were fed. Breakpoint requirement estimates for gain and gain:feed, respectively, were: Lys (0.85, 0.96%), Ile (0.59, 0.58%), and Val (0.74, 0.74%). Using the higher of broken-line requirement estimates for gain and gain:feed, ideal ratios (as a % of Lys) were: Lys (100), Ile (61.6) and Val (77.8).","Made available in DSpace on 2015-09-25T21:08:09Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3086156.pdf: 4212833 bytes, checksum: 5f993df735e8bcceabf650f6a5bc758b (MD5) Previous issue date: 2003","Embargo set by: Seth Robbins for item 84836 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","92 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003."]},{"key":"dc:title","label":"Title","values":["Branched -Chain Amino Acid Nutrition of Grow-Finish Pigs and Young Chicks"]}]}],"canonical_facts":{"dc:contributor":["Baker, David H."],"dc:creator":["Parr, Theresa Margaret"],"dc:date":["2015-09-25T21:08:09Z","10000-01-01","2003"],"dc:description":["Three bioassays and two digestibility trials were conducted to determine the true digestible isoleucine (Ile) requirement for maximal weight gain and minimal plasma urea-nitrogen (PUN) of growing (25 to 45 kg) pigs. An Ile-deficient basal diet (0.30% true digestible Ile) utilizing red blood cells (RBC) was developed and validated. Digestibility of Ile in the RBC product was determined in both cecectomized roosters and ileal-cannulated pigs and found to be 97%. Broken-line analysis of dose titrations of Ile (0.38 to 0.58% true digestible Ile) suggested a true digestible Ile requirement of 0.50% for growing pigs. Minimal plasma urea-nitrogen levels in the blood agreed with results of the growth assay, suggesting that growing pigs between 25 and 45 kg require an estimated 0.50% true digestible Ile in the diet, or 1.46 g/Mcal ME, for maximal weight gain and minimal PUN. A second project examined the true digestible Ile requirement of high-lean-gain, late-finishing pigs, utilizing maximal weight gain and minimal PUN as response parameters. True digestibility of Ile in the basal diet was calculated to be 88%, based on the 97% true digestibility value obtained for Ile in RBC, together with true Ile digestibility values for corn and soybean meal. Maximal weight gain and minimal PUN responses to incremental Ile suggested a true digestible Ile requirement estimate of 0.31%, or 0.89 g/Mcal ME for high-lean-gain, late-finishing pigs. The third project evaluated the ideal ratios of Ile and valine (Val) relative to lysine (Lys) in chicks during the second and third week of life. A basal diet deficient in Lys, Ile and Val was formulated utilizing corn-gluten meal (CGM). Six dose levels of each AA were fed in three different experiments. Quadratic responses to each AA occurred when graded levels of digestible Lys (0.68 to 1.28%), Ile (0.45 to 0.95%) or Val (0.51 to 1.06%) were fed. Breakpoint requirement estimates for gain and gain:feed, respectively, were: Lys (0.85, 0.96%), Ile (0.59, 0.58%), and Val (0.74, 0.74%). Using the higher of broken-line requirement estimates for gain and gain:feed, ideal ratios (as a % of Lys) were: Lys (100), Ile (61.6) and Val (77.8).","Made available in DSpace on 2015-09-25T21:08:09Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3086156.pdf: 4212833 bytes, checksum: 5f993df735e8bcceabf650f6a5bc758b (MD5) Previous issue date: 2003","Embargo set by: Seth Robbins for item 84836 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","92 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003."],"dc:identifier":["http://hdl.handle.net/2142/83555","(MiAaPQ)AAI3086156"],"dc:language":["eng"],"dc:subject":["Agriculture, Animal Culture and Nutrition"],"dc:title":["Branched -Chain Amino Acid Nutrition of Grow-Finish Pigs and Young Chicks"],"dc:type":["text"],"thesis:degree_discipline":["Animal Sciences"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:21Z"}