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oai:www.ideals.illinois.edu:2142/83538 2023-07-11 col_2142_5131 col_2142_14771 com_2142_5130 com_2142_685 com_2142_397

2001 2001 Murphy, Michael R. Shah, Mohammad Abid Pervez 2015-09-25T21:08:02Z 2015-09-25T21:08:02Z 10000-01-01 A final 9-wk experiment studied the performance of 24 Holstein cows during the transition period. Cows were assigned to either a control or a liquid-flavored (0.52 ml/kg of feed) totally mixed ration in a randomized complete-block design. Weekly means of DMI, milk production, and body weight were analyzed. Individual cow daily DMI data were fitted to the exponential model. There was no effect of treatment on these variables or the fractional rates of increase in DMI. Multiple regression analysis suggested that more body weight was mobilized per unit increase in 3.5% fat-corrected milk in cows fed the control diet, and those cows tended to be in more negative energy balance than cows fed the flavored diet. Parameters of both the exponential and cosinor models were associated with various pre- and post-parturn production variables. Plasma progesterone concentrations were positively correlated with DMI. It was concluded that feeding the flavor improved the energy balance of cows in early lactation and may reduce the risk of health or reproductive problems. Overall, the exponential model was consistently more accurate and robust than the current NRC equation. Together with cosinor model it explained most of the day-to-day variation in the feed consumption of dairy cows in early lactation. The association between plasma progesterone and DMI was also confirmed. Made available in DSpace on 2015-09-25T21:08:02Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3030478.pdf: 6898173 bytes, checksum: 448af2aac99150cd3040f42832aa988c (MD5) Previous issue date: 2001 Embargo set by: Seth Robbins for item 84819 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 170 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2001. http://hdl.handle.net/2142/83538 (MiAaPQ)AAI3030478 eng Biology, Animal Physiology Day-to-Day Variation in the Feed Consumption of Dairy Cows in Early Lactation text Animal Sciences Animal Sciences University of Illinois at Urbana-Champaign Dissertation Ph.D.