{"id":{"repo_id":"sdstate","oai_identifier":"oai:openprairie.sdstate.edu:etd-2295"},"canonical_url":"https://search.dev.ndltd.org/etd/sdstate/oai:openprairie.sdstate.edu:etd-2295","repository":{"repo_id":"sdstate","name":"South Dakota State University","base_url":"https://openprairie.sdstate.edu/do/oai/"},"display":{"title":"Utilization of Aspen Pellets as a Partial Roughage Replacement for Lactating Dairy Cows","abstract":"<p>A complete switchback design using ten lactating cows divided into two groups of five was used to evaluate rations containing either (A) 30% dry matter from aspen pellets, 30% OM from corn silage, and 40% DM from a 28% crude protein· concentrate mix, or (B) 60% OM from corn silage and 40% OM from the concentrate mix, to determine if aspen could serve as a partial roughage for lactating dairy cows. All cows were at least 80 days into lactation at the start of the trial. Aspen contained on a DM basis, 1.9% crude protein, 80.3% neutral detergent fiber, 64.5% acid detergent fiber, and 16.88% lignin. There were no significant ration effects on milk production, composition, or flavor; except for slightly higher amounts of 18:0 and 18:1 fatty acids of milk fat from cows fed aspen. Adjusted means for rations A and B were as follows: milk production, kg/day (20.94, 21.35), % milk fat (3.49, 3.50), % milk solids (12.26, 12.22), % milk protein (3.09, 3.08), and milk flavor judged by an experienced panel using the AOSA-OFISA score card with 10 as best score (8.77, 8.77). Cows fed ration A consumed 19.36 kg DM and those fed ration B consumed 19.28 kg DM on a daily basis. Rumen samples were taken via the stomach tube 3-4 hours after feeding the fourth week of each period. Rumen ammonia was similar for both groups. Concentration of total volatile fatty acids for cows fed rations A and B (48.71, 63.17 moles/ml) was lower for the aspen fed cows. The results of this study indicated that aspen can serve as a partial roughage replacement for lactating dairy cows.</p>","abstract_html":"&lt;p&gt;A complete switchback design using ten lactating cows divided into two groups of five was used to evaluate rations containing either (A) 30% dry matter from aspen pellets, 30% OM from corn silage, and 40% DM from a 28% crude protein· concentrate mix, or (B) 60% OM from corn silage and 40% OM from the concentrate mix, to determine if aspen could serve as a partial roughage for lactating dairy cows. All cows were at least 80 days into lactation at the start of the trial. Aspen contained on a DM basis, 1.9% crude protein, 80.3% neutral detergent fiber, 64.5% acid detergent fiber, and 16.88% lignin. There were no significant ration effects on milk production, composition, or flavor; except for slightly higher amounts of 18:0 and 18:1 fatty acids of milk fat from cows fed aspen. Adjusted means for rations A and B were as follows: milk production, kg/day (20.94, 21.35), % milk fat (3.49, 3.50), % milk solids (12.26, 12.22), % milk protein (3.09, 3.08), and milk flavor judged by an experienced panel using the AOSA-OFISA score card with 10 as best score (8.77, 8.77). Cows fed ration A consumed 19.36 kg DM and those fed ration B consumed 19.28 kg DM on a daily basis. Rumen samples were taken via the stomach tube 3-4 hours after feeding the fourth week of each period. Rumen ammonia was similar for both groups. Concentration of total volatile fatty acids for cows fed rations A and B (48.71, 63.17 moles/ml) was lower for the aspen fed cows. The results of this study indicated that aspen can serve as a partial roughage replacement for lactating dairy cows.&lt;/p&gt;","abstract_has_math":false,"creators":["Kipp, Deborah Sharples"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Thesis - Open Access","degree_discipline":"Dairy Science","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1979,"date_issued":"1979-01-01T08:00:00Z","date_published":"1979-01-01T08:00:00Z","updated_at":"2026-07-24T04:29:00Z","subjects":["Dairy Science"],"languages":["en"],"rights":["<p>In Copyright - Non-Commercial Use Permitted<br /><a href=\"http://rightsstatements.org/vocab/InC-NC/1.0/\">http://rightsstatements.org/vocab/InC-NC/1.0/</a></p>"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://openprairie.sdstate.edu/etd/1294","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Kipp, Deborah Sharples"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2017-07-20T07:00:00Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Dairy Science"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis - Open Access"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Dairy Science"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["<p>In Copyright - Non-Commercial Use Permitted<br /><a href=\"http://rightsstatements.org/vocab/InC-NC/1.0/\">http://rightsstatements.org/vocab/InC-NC/1.0/</a></p>"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://openprairie.sdstate.edu/etd/1294"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["<p>A complete switchback design using ten lactating cows divided into two groups of five was used to evaluate rations containing either (A) 30% dry matter from aspen pellets, 30% OM from corn silage, and 40% DM from a 28% crude protein· concentrate mix, or (B) 60% OM from corn silage and 40% OM from the concentrate mix, to determine if aspen could serve as a partial roughage for lactating dairy cows. All cows were at least 80 days into lactation at the start of the trial. Aspen contained on a DM basis, 1.9% crude protein, 80.3% neutral detergent fiber, 64.5% acid detergent fiber, and 16.88% lignin. There were no significant ration effects on milk production, composition, or flavor; except for slightly higher amounts of 18:0 and 18:1 fatty acids of milk fat from cows fed aspen. Adjusted means for rations A and B were as follows: milk production, kg/day (20.94, 21.35), % milk fat (3.49, 3.50), % milk solids (12.26, 12.22), % milk protein (3.09, 3.08), and milk flavor judged by an experienced panel using the AOSA-OFISA score card with 10 as best score (8.77, 8.77). Cows fed ration A consumed 19.36 kg DM and those fed ration B consumed 19.28 kg DM on a daily basis. Rumen samples were taken via the stomach tube 3-4 hours after feeding the fourth week of each period. Rumen ammonia was similar for both groups. Concentration of total volatile fatty acids for cows fed rations A and B (48.71, 63.17 moles/ml) was lower for the aspen fed cows. The results of this study indicated that aspen can serve as a partial roughage replacement for lactating dairy cows.</p>"]},{"key":"dc:title","label":"Title","values":["Utilization of Aspen Pellets as a Partial Roughage Replacement for Lactating Dairy Cows"]}]}],"canonical_facts":{"dc:creator":["Kipp, Deborah Sharples"],"dc:date.available":["2017-07-20T07:00:00Z"],"dc:description.abstract":["<p>A complete switchback design using ten lactating cows divided into two groups of five was used to evaluate rations containing either (A) 30% dry matter from aspen pellets, 30% OM from corn silage, and 40% DM from a 28% crude protein· concentrate mix, or (B) 60% OM from corn silage and 40% OM from the concentrate mix, to determine if aspen could serve as a partial roughage for lactating dairy cows. All cows were at least 80 days into lactation at the start of the trial. Aspen contained on a DM basis, 1.9% crude protein, 80.3% neutral detergent fiber, 64.5% acid detergent fiber, and 16.88% lignin. There were no significant ration effects on milk production, composition, or flavor; except for slightly higher amounts of 18:0 and 18:1 fatty acids of milk fat from cows fed aspen. Adjusted means for rations A and B were as follows: milk production, kg/day (20.94, 21.35), % milk fat (3.49, 3.50), % milk solids (12.26, 12.22), % milk protein (3.09, 3.08), and milk flavor judged by an experienced panel using the AOSA-OFISA score card with 10 as best score (8.77, 8.77). Cows fed ration A consumed 19.36 kg DM and those fed ration B consumed 19.28 kg DM on a daily basis. Rumen samples were taken via the stomach tube 3-4 hours after feeding the fourth week of each period. Rumen ammonia was similar for both groups. Concentration of total volatile fatty acids for cows fed rations A and B (48.71, 63.17 moles/ml) was lower for the aspen fed cows. The results of this study indicated that aspen can serve as a partial roughage replacement for lactating dairy cows.</p>"],"dc:identifier":["https://openprairie.sdstate.edu/etd/1294"],"dc:language":["en"],"dc:rights":["<p>In Copyright - Non-Commercial Use Permitted<br /><a href=\"http://rightsstatements.org/vocab/InC-NC/1.0/\">http://rightsstatements.org/vocab/InC-NC/1.0/</a></p>"],"dc:subject":["Dairy Science"],"dc:title":["Utilization of Aspen Pellets as a Partial Roughage Replacement for Lactating Dairy Cows"],"thesis:degree_discipline":["Dairy Science"],"thesis:degree_level":["Thesis - Open Access"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T04:29:00Z"}