{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/69992"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/69992","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Factors Affecting Degradation and Utilization of Protein Sources by Ruminants","abstract":"In vivo, in situ and in vitro studies were conducted to evaluate degradation and utilization of various protein sources by ruminants.","abstract_html":"In vivo, in situ and in vitro studies were conducted to evaluate degradation and utilization of various protein sources by ruminants.","abstract_has_math":false,"creators":["Loerch, Steven Christopher"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Animal Science","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-15T21:00:39Z","date_published":"2014-12-15T21:00:39Z","updated_at":"2026-07-22T22:26:02Z","subjects":["Agriculture, Animal Culture and Nutrition"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8209601"],"render_values":[{"text":"(UMI)AAI8209601","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/69992","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Loerch, Steven Christopher"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-15T21:00:39Z","10000-01-01","1982"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Animal Science"]},{"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":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/69992","(UMI)AAI8209601"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["In vivo, in situ and in vitro studies were conducted to evaluate degradation and utilization of various protein sources by ruminants.","Blood meal (BM), meat and bone meal (MBM), and dehydrated alfalfa (DA) were compared with soybean meal (SBM) as supplemental protein sources in two steer and two lamb feedlot trials. Medium to high energy diets, typical of feedlot conditions were fed. No consistent differences in average daily gain, feed intake, or feed efficiency were noted between treatments.","N solubility of casein (C), SBM, BM, MBM, DA, and corn gluten meal was determined in .867% MaCl, MeDougall's artificial saliva, 10% modified Burroughs' mineral mixture, and .02N NaOH. A solvent X protein source interaction suggested that none of these solvents could adequately predict rumen solubility for all protein sources tested. A solvent pH X protein source interaction also existed when solubility of protein sources was determined in McDougall's artificial saliva adjusted to pHs of 5, 6, or 7. In situ N disappearance of C, SBM, and DA decreased with increasing levels of dietary high-moisture corn. Increasing levels of NaOH-treated corn did not affect in situ N disappearance of these protein sources, suggesting that the decreased ruminal protein degradation observed when ruminants were fed high energy diets was primarily due to depressed rumen pH. In situ N disappearance of four protein sources after 12 hours incubation varied depending upon dietary protein supplement, suggesting a possible adaptation of rumen microorganisms to dietary protein source.","Estimated true digestibility of SBM, BM, MBM, and DA was 100.4, 99.1, 86.4, and 85.2%, respectively. Rumen N bypass of BM, MBM, and DA was greater than N bypass of SBM. A method of estimating digestible N bypass suggested that BM provided the greatest amount of digestible N to the duodenum. N bypass was more highly correlated with in situ residual N at 3, 12, and 24 hours than with in situ residual N at 6 hours, rate of N disappearance from 3-12 hours, or in vitro N insolubility.","Made available in DSpace on 2014-12-15T21:00:39Z (GMT). No. of bitstreams: 1 8209601.pdf: 3361742 bytes, checksum: ec1426af3d9aae61b68a889eb8099622 (MD5) Previous issue date: 1982","Embargo set by: Seth Robbins for item 70158 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","96 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1982."]},{"key":"dc:title","label":"Title","values":["Factors Affecting Degradation and Utilization of Protein Sources by Ruminants"]}]}],"canonical_facts":{"dc:creator":["Loerch, Steven Christopher"],"dc:date":["2014-12-15T21:00:39Z","10000-01-01","1982"],"dc:description":["In vivo, in situ and in vitro studies were conducted to evaluate degradation and utilization of various protein sources by ruminants.","Blood meal (BM), meat and bone meal (MBM), and dehydrated alfalfa (DA) were compared with soybean meal (SBM) as supplemental protein sources in two steer and two lamb feedlot trials. Medium to high energy diets, typical of feedlot conditions were fed. No consistent differences in average daily gain, feed intake, or feed efficiency were noted between treatments.","N solubility of casein (C), SBM, BM, MBM, DA, and corn gluten meal was determined in .867% MaCl, MeDougall's artificial saliva, 10% modified Burroughs' mineral mixture, and .02N NaOH. A solvent X protein source interaction suggested that none of these solvents could adequately predict rumen solubility for all protein sources tested. A solvent pH X protein source interaction also existed when solubility of protein sources was determined in McDougall's artificial saliva adjusted to pHs of 5, 6, or 7. In situ N disappearance of C, SBM, and DA decreased with increasing levels of dietary high-moisture corn. Increasing levels of NaOH-treated corn did not affect in situ N disappearance of these protein sources, suggesting that the decreased ruminal protein degradation observed when ruminants were fed high energy diets was primarily due to depressed rumen pH. In situ N disappearance of four protein sources after 12 hours incubation varied depending upon dietary protein supplement, suggesting a possible adaptation of rumen microorganisms to dietary protein source.","Estimated true digestibility of SBM, BM, MBM, and DA was 100.4, 99.1, 86.4, and 85.2%, respectively. Rumen N bypass of BM, MBM, and DA was greater than N bypass of SBM. A method of estimating digestible N bypass suggested that BM provided the greatest amount of digestible N to the duodenum. N bypass was more highly correlated with in situ residual N at 3, 12, and 24 hours than with in situ residual N at 6 hours, rate of N disappearance from 3-12 hours, or in vitro N insolubility.","Made available in DSpace on 2014-12-15T21:00:39Z (GMT). No. of bitstreams: 1 8209601.pdf: 3361742 bytes, checksum: ec1426af3d9aae61b68a889eb8099622 (MD5) Previous issue date: 1982","Embargo set by: Seth Robbins for item 70158 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","96 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1982."],"dc:identifier":["http://hdl.handle.net/2142/69992","(UMI)AAI8209601"],"dc:subject":["Agriculture, Animal Culture and Nutrition"],"dc:title":["Factors Affecting Degradation and Utilization of Protein Sources by Ruminants"],"dc:type":["text"],"thesis:degree_discipline":["Animal Science"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:02Z"}