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Journal

Kansas Agricultural Experiment Station Research Reports

Dairy Science

2002

Keyword

Articles 1 - 12 of 12

Full-Text Articles in Life Sciences

Changes In Ruminal Microbial Populations In Transition Dairy Cows (2002), A.F. Park, Evan C. Titgemeyer, R.C. Cochran, J.M. Defrain Jan 2002

Changes In Ruminal Microbial Populations In Transition Dairy Cows (2002), A.F. Park, Evan C. Titgemeyer, R.C. Cochran, J.M. Defrain

Kansas Agricultural Experiment Station Research Reports

We used four ruminally fistulated, multiparous, pregnant Holstein cows to delineate microbial adaptations in dairy cows as they experienced the transition from one lactation to the next. Diets consisted of typical far-off and close-up diets, a late lactation diet containing wet corn gluten feed (20% DM) and an alfalfa hay-corn silage based early lactation diet. Calculated NEL (Mcal/lb), measured crude protein (%), and diet digestibilities (%; based on steers fed at 2% of BW) were: 0.78, 18.7, 74.1; 0.70, 11.5, 66.2; 0.74, 15.6, 71.0; 0.73, 18.4, 70.7 for late lactation, far-off dry, close-up dry, and early lactation, respectively. Microbial samples …

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Comparative Study Of Three Expeller Process Soybean Meals In Diets For Lactating Dairy Cows (2002), V. Burgos, Evan C. Titgemeyer, John E. Shirley Jan 2002

Comparative Study Of Three Expeller Process Soybean Meals In Diets For Lactating Dairy Cows (2002), V. Burgos, Evan C. Titgemeyer, John E. Shirley

Kansas Agricultural Experiment Station Research Reports

Forty-eight primiparous Holstein cows were used in two simultaneous 3x3 Latin squares with 28-day periods to evaluate expeller soybean meal from three sources. Six pens containing eight cows each were utilized. Cows were pen fed diets formulated in accordance with NRC (2001) recommendations and based on the assumption that the three sources of soybean meal were nutritionally identical. Diets contained on a dry matter basis, 24.3% chopped alfalfa hay, 9.3% field processed corn silage, 9.2% whole fuzzy cottonseed, 19.2% wet corn gluten feed (Minnesota Corn Processors, Inc., Columbus, NE), and 38% grain mix (70.2% dry rolled corn grain, 18.44% expeller …

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Diet Digestibility And Rumen Traits In Response To Feeding Wet Corn Gluten Feed And A Pellet Consisting Of Raw Soybean Hulls And Corn Steep Liquor (2002), E. E. Ferdinand, John E. Shirley, Evan C. Titgemeyer, J.M. Defrain Jan 2002

Diet Digestibility And Rumen Traits In Response To Feeding Wet Corn Gluten Feed And A Pellet Consisting Of Raw Soybean Hulls And Corn Steep Liquor (2002), E. E. Ferdinand, John E. Shirley, Evan C. Titgemeyer, J.M. Defrain

Kansas Agricultural Experiment Station Research Reports

Four ruminally cannulated and two intact multiparous Holstein cows were used in a 3 x 3 replicated Latin square design to evaluate digestibility and rumen traits in lactating dairy cows in response to feeding wet corn gluten feed and a novel product containing raw soybean hulls and corn steep liquor. Three dietary treatments were fed in the experiment. The control contained (DM basis) 30% alfalfa hay, 15% corn silage, 32% corn, 9.3% whole cottonseed, 4.4% solvent soybean meal (SBM), 3.3% expeller SBM, 1.3% fish meal, 1% wet molasses, and 3.7% vitamins/ minerals. Wet corn gluten feed replaced 10% alfalfa hay, …

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Metabolic Changes During The Transition Period (2002), A.F. Park, E.C. Titegemeyer, R.C. Cochran, J.M. Defrain Jan 2002

Metabolic Changes During The Transition Period (2002), A.F. Park, E.C. Titegemeyer, R.C. Cochran, J.M. Defrain

Kansas Agricultural Experiment Station Research Reports

We used four ruminally fistulated, multiparous, pregnant Holstein cows to measure changes in concentrations of plasma metabolite as the dairy cow transitions from one lactation to the next. Diets consisted of typical far-off and close-up diets, a late lactation diet containing wet corn gluten feed (20% DM), and an alfalfa hay-corn silage based early lactation diet. Calculated NEL (Mcal/lb), measured crude protein (%), and diet digestibilities (%; based on steers fed at 2% of BW) were 0.78, 18.7, 74.1; 0.70, 11.5, 66.2; 0.74, 15.6, 71.0; 0.73, 18.4, 70.7 for late lactation, far-off dry, close-up dry, and early lactation diets, respectively. …

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Complete Lactational Performance Of Cows Fed Wet Corn Gluten Feed And Pellet Consisting Of Raw Soybean Hulls And Corn Steep Liquor (2002), E.E. Ferdinand, Evan C. Titgemeyer, J.M. Defrain, A.F. Park Jan 2002

Complete Lactational Performance Of Cows Fed Wet Corn Gluten Feed And Pellet Consisting Of Raw Soybean Hulls And Corn Steep Liquor (2002), E.E. Ferdinand, Evan C. Titgemeyer, J.M. Defrain, A.F. Park

Kansas Agricultural Experiment Station Research Reports

We evaluated the effect of wet corn gluten feed and a novel product containing raw soybean hulls and corn steep liquor on performance in lactating dairy cows. Forty-six multiparous Holstein cows were used in a randomized incomplete block design. Cows were housed in tie stalls for the first 13 weeks of lactation and moved to group pens for the remainder of the study. Cows were blocked by calving date and assigned to control, wet corn gluten feed (20% of diet DM), or the novel product (20% of diet DM). Diets were administered as total mixed rations at the first feeding …

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Milking Frequency, Estradiol Cypionate, And Bst Alters Milk Yield And Reproductive Outcomes In Dairy Cows (2002), C.A. Blevins, J.J. Aberle, B.A. Hensley, S.M Tiffany Jan 2002

Milking Frequency, Estradiol Cypionate, And Bst Alters Milk Yield And Reproductive Outcomes In Dairy Cows (2002), C.A. Blevins, J.J. Aberle, B.A. Hensley, S.M Tiffany

Kansas Agricultural Experiment Station Research Reports

The objective of this study was to determine how milking frequency, estradiol cypionate (ECP) postpartum therapy given at 1 week after calving, and biweekly bovine somatotropin (bST) administration alter lactational and reproductive outcomes in dairy cattle. Holstein cows (n=144) were randomly assigned to eight treatments (18 cows per treatment): 1) twice daily milking frequency (2x), 10-mg injection of ECP at 1 week after calving (ECP), and bST (given biweekly according to label beginning in the ninth week of lactation); 2) 2x milked, oil (cottonseed oil vehicle for ECP), bST; 3) 2x milked, ECP, and no bST; 4) 2x milked, oil, …

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Association Of Cow And Quarter-Level Factors At A Dry Off And New Intramammary Infections In The Dry Period (2002), R.T. Dingwell, K.E. Leslie, J.M. Sargeant, Y.H. Schukken Jan 2002

Association Of Cow And Quarter-Level Factors At A Dry Off And New Intramammary Infections In The Dry Period (2002), R.T. Dingwell, K.E. Leslie, J.M. Sargeant, Y.H. Schukken

Kansas Agricultural Experiment Station Research Reports

Data from 300 cows and 1,178 quarters were analyzed to determine factors associated with new intramammary infections (IMI). Teatends that were cracked and teats that did not close during the dry period were 1.7 and 1.8 times more likely to develop new IMI, respectively. The level of milk production on the last day of lactation significantly influenced new IMI and teat canal closure. More (P<0.05) cows (36%) producing $21 kg of milk developed new IMI than cows (18%) producing less. When milk production was 21 kg or higher, teat canals were 1.8 times more likely to remain open.; Dairy Day, 2002, Kansas State University, Manhattan, KS, 2002;

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Effect Of Tunnel Ventilation And Evaporative Cooling On The Barn Environment And Cow Comfort In Midwest Dairy Facilities (2002), John F. Smith, Joseph P. Harner, Michael J. Brouk Jan 2002

Effect Of Tunnel Ventilation And Evaporative Cooling On The Barn Environment And Cow Comfort In Midwest Dairy Facilities (2002), John F. Smith, Joseph P. Harner, Michael J. Brouk

Kansas Agricultural Experiment Station Research Reports

During the summer of 2001 six tunnel ventilated tie stall barns in northeastern Missouri and southeastern Iowa were evaluated. Three of the barns were equipped with cellulose evaporative pads and three were not. Temperature and relative humidity were recorded continuously for 11 weeks from July 1 to September 15, 2001. Cattle housed in tie stall barns equipped with evaporative cooling had lower average respiration rates (65.7 vs 70.3 breaths/min) than those housed in barns without evaporative cooling. However, rates observed in the morning and at night were not different, only the afternoon rates differed significantly. Average rectal temperatures were also …

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Evaluation Of The California Mastitis Test To Determine Udder Health Status Of Early Lactation Dairy Cows (2002), R.T. Dingwell, K.E. Leslie, J.M. Sargeant, Y.H. Schukken Jan 2002

Evaluation Of The California Mastitis Test To Determine Udder Health Status Of Early Lactation Dairy Cows (2002), R.T. Dingwell, K.E. Leslie, J.M. Sargeant, Y.H. Schukken

Kansas Agricultural Experiment Station Research Reports

Quarter milk bacteriology results of samples collected within the first week of calving were used to calculate the test characteristics of the California Mastitis Test (CMT) that estimate the udder health status of fresh dairy cows. Over 1,200 quarters were both cultured and had a CMT performed. The overall sensitivity and specificity of the CMT was 68.8% and 71.5%, respectively. Using a cutpoint of any CMT reaction as a positive test and examining the results by various days in milk, the highest sensitivity and specificity occurred at day four (82.4% and 80.6%, respectively). The CMT has the potential to be …

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Characteristic Changes Of Ruminal Fermentation In Transition Dairy Cows (2002), A.F. Park, Evan C. Titgemeyer, R.C. Cochran, J.M. Defrain Jan 2002

Characteristic Changes Of Ruminal Fermentation In Transition Dairy Cows (2002), A.F. Park, Evan C. Titgemeyer, R.C. Cochran, J.M. Defrain

Kansas Agricultural Experiment Station Research Reports

Four-ruminally fistulated, multiparous, pregnant Holstein cows were used to delineate changes in ruminal fermentation in dairy cows as they experienced the transition from one lactation to the next. Diets consisted of typical far-off and close-up diets, a late lactation diet containing wet corn gluten feed (20% DM) and an alfalfa hay-corn silage based early lactation diet. Calculated NEL (Mcal/lb), measured crude protein (%), and diet digestibilities (%; based on steers fed at 2% of BW) were: 0.78, 18.7, 74.1; 0.70, 11.5, 66.2; 0.74, 15.6, 71.0; 0.73, 18.4, 70.7 for late lactation, far-off dry, close-up dry, and early lactation diets, respectively. …

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Comparative Value Of Full-Fat Corn Germ, Whole Cottonseed And Tallow As Energy Sources For Lactating Dairy Cows (2002), W.F. Miller, Evan C. Titgemeyer, Michael V. Scheffel, R.T. Ethington Jan 2002

Comparative Value Of Full-Fat Corn Germ, Whole Cottonseed And Tallow As Energy Sources For Lactating Dairy Cows (2002), W.F. Miller, Evan C. Titgemeyer, Michael V. Scheffel, R.T. Ethington

Kansas Agricultural Experiment Station Research Reports

We used 24 multiparous Holstein cows in 4 x 4 Latin square design to evaluate full-fat corn germ as a replacement for whole cottonseed and tallow in total mixed diets for lactating dairy cows. Experimental diets on a dry matter basis were: 1) control 3.5% fat; 2) whole cottonseed 5.1% fat; 3) tallow 5.1% fat; 4) full-fat corn germ 5.1% fat. Diets were fed as total mixed rations typical of that fed on commercial dairy operations. Cottonseed meal and cottonseed hulls were included in the control, tallow, and full-fat corn germ diets to balance for fiber and protein fractions equal …

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Performance Of Dairy Heifers Fed High Forage Diets Supplemented With Bambermycins, Lasalocid Or Monesin (2002), A. Hammond, Michael V. Scheffel, Evan C. Titgemeyer, Jeffrey S. Stevenson Jan 2002

Performance Of Dairy Heifers Fed High Forage Diets Supplemented With Bambermycins, Lasalocid Or Monesin (2002), A. Hammond, Michael V. Scheffel, Evan C. Titgemeyer, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

One hundred and twenty Holstein heifers weighing approximately 450 lb at the beginning of the study were used to evaluate the impact of bambermycins (Gainpro®), monensin (Rumensin®), and lasalocid (Bovatec®) on performance when included in high forage diets fed ad libitum. Heifers were housed in 24 pens (5 hf/pen) containing a super hutch. Pens were blocked (3 pens/block) from heaviest to lightest and randomly assigned within blocks to bambermycins, lasalocid, or monensin treatment. Bambermycins, lasalocid, and monensin were mixed with fine ground corn and fed as topdressing to deliver 20.25, 150, and 150 mg/hd daily, respectively. Diets were formulated (NRC …

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