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Full-Text Articles in Animal Sciences
Responses Of Lactating Holstein Cows To Increasing Amounts Of Wet Corn Gluten Feed (2006), John F. Smith, K. Grigsby, Michael J. Brouk
Responses Of Lactating Holstein Cows To Increasing Amounts Of Wet Corn Gluten Feed (2006), John F. Smith, K. Grigsby, Michael J. Brouk
Kansas Agricultural Experiment Station Research Reports
Forty lactating Holstein cows were allocated into groups of 5 cows each and assigned to 8 pens containing 10 freestalls each. Each group contained 3 heifers and 2 multiparous cows. Groups were balanced by milk production and days in milk. Diets were formulated to contain none (control), 12, 24, or 36% wet corn gluten feed (WCGF) on a dry matter (DM) basis. Increasing amounts of WCGF and heat-treated expeller soybean meal replaced a portion of the corn silage, alfalfa hay, corn grain, soybean meal, and soybean hulls of the control diet to maintain similar concentrations of crude protein (CP), ruminally …
Efficiency Of Phosphorus Utilization In Dairy Operations (2006), Joseph P. Harner, Michael J. Brouk
Efficiency Of Phosphorus Utilization In Dairy Operations (2006), Joseph P. Harner, Michael J. Brouk
Kansas Agricultural Experiment Station Research Reports
Efficient utilization of nutrients is a must on modern dairies. Most of the phosphorus arriving at the dairy will either be found in purchased feedstuffs or commercial fertilizer used to raise grain and forage for the dairy. In general, those dairies that purchase all feeds are more efficient with phosphorus utilization than those that grow forage and grain. This is likely due to increased inefficiencies associ-ated with feeding and crop enterprises. Care-ful evaluation of diets to reduce feeding ex-cess phosphorus can reduce phosphorus excre-tion in the manure by as much as 50%. This not only reduces input costs, but also …
Evaluation Of Ruminal Degradability And Lysine Bioavailability Of Four Soybean Meal Products (2006), M.S. Awawdeh, Evan C. Titgemeyer, James S. Drouillard, R. Scott Beyer
Evaluation Of Ruminal Degradability And Lysine Bioavailability Of Four Soybean Meal Products (2006), M.S. Awawdeh, Evan C. Titgemeyer, James S. Drouillard, R. Scott Beyer
Kansas Agricultural Experiment Station Research Reports
Evaluations of four soybean meal (SBM) products were conducted. The products were: solvent SBM (SSBM), expeller SBM (ESBM), lignosulfonate-treated SBM (LSBM), and SSBM treated with 0.05% Baker's yeast and toasted at 212ºF (YSBM). In situ ruminal degradations of YSBM and LSBM were slower than those of SSBM or ESBM; thus, ruminally undegraded protein contents of YSBM and LSBM were greater than those of SSBM or ESBM. The ruminally undegraded protein of all SBM products had similar small intestine digestibility when as-sessed by susceptibility to enzymatic digestion in vitro. Available lysine contents, estimated chemically or using standard chick growth assay, were …
Evaluate The Efficacy Of "Heat Stress Audits" Of Your Cooling System Through Core Body Temperature (2006), John F. Smith, M. Vanbaale, C. Jamison, R. Rodriguez
Evaluate The Efficacy Of "Heat Stress Audits" Of Your Cooling System Through Core Body Temperature (2006), John F. Smith, M. Vanbaale, C. Jamison, R. Rodriguez
Kansas Agricultural Experiment Station Research Reports
A project to evaluate the degree of heat stress in individual dairies was carried out in the summer of 2005. The object of this project was to develop a method to evaluate or audit how effective an individual dairy is in manag-ing heat stress. Approximately 45 herds in 20 different states were audited for the degree of heat stress cows experienced during a 72-hr period. Dairies were selected based on geog-raphy, climate, and facility design. Lactating cows 40 to 100 days in milk (DIM) and dry cows within 30 days of calving were evalu-ated. Vaginal temperatures of 8 cows located …
Consumptive Water Usage Of Evaporative Pads (2006), C. Schmidt, John F. Smith, Joseph P. Harner, Michael J. Brouk
Consumptive Water Usage Of Evaporative Pads (2006), C. Schmidt, John F. Smith, Joseph P. Harner, Michael J. Brouk
Kansas Agricultural Experiment Station Research Reports
Consumptive water usage by evaporative pads was measured during 7 days of a 3-week period at a Kansas (KS) dairy and a 2-day pe-riod at a North Dakota (ND) dairy. Water me-ters were installed between the water hydrants, and evaporative pads at each dairy, and were monitored. Data were recorded every 30 min-utes during 5 hr at the KS site and every 15 minutes during 1 to 2.5 hr at the ND site. Ra-tio of pad area to cow equaled 4.8 and 4.5 ft2 per cow at the KS and ND sites, respectively. Airflow rates through the pads were 1.2, …
Effects Of Four Soybean Meal Products On Lactational Performance Of Dairy Cows (2006), M.S. Awawdeh, Evan C. Titgemeyer, James S. Drouillard, John E. Shirley
Effects Of Four Soybean Meal Products On Lactational Performance Of Dairy Cows (2006), M.S. Awawdeh, Evan C. Titgemeyer, James S. Drouillard, John E. Shirley
Kansas Agricultural Experiment Station Research Reports
Thirty-two multiparous Holstein cows (152 days in milk, producing 90 lb/day of milk at the beginning of the study) were used in a 4 x 4 Latin square design with 28-day periods to investigate cow responsiveness to supple-mental ruminally undegraded protein from 4 soybean meal products. The 4 products were: solvent soybean meal (SSBM), expeller soy-bean meal (ESBM), lignosulfonate-treated soybean meal (LSBM), and SSBM treated with 0.05% baker's yeast and toasted at 212ºF (YSBM). Diets were formulated by substitut-ing all SSBM and part of ground corn with YSBM, ESBM, or LSBM to yield isonitroge-nous diets. Diets were formulated to provide …
Influence Of Facilities On Cow Time Budgets (2006), Joseph P. Harner, John F. Smith, Michael J. Brouk
Influence Of Facilities On Cow Time Budgets (2006), Joseph P. Harner, John F. Smith, Michael J. Brouk
Kansas Agricultural Experiment Station Research Reports
A model was developed to evaluate the impact of facilities on cow time budgets. The model suggests that in inadequate facilities overcrowding of the facility by 25% or more resulted because occupancy rate exceeded 100%. The model also is useful in evaluating the impact of time at milking center and milk-ing frequency on cow time budget. In general, the first groups of cows through the milking parlor will have adequate time for resting, feeding, socializing, and watering. The last groups of cows through the parlor, however, do not have adequate time for these activities if the time at the milking …
Characteristics Of Low-Profile Cross-Ventilated Freestalls (2006), Joseph P. Harner, John F. Smith, R. Millner
Characteristics Of Low-Profile Cross-Ventilated Freestalls (2006), Joseph P. Harner, John F. Smith, R. Millner
Kansas Agricultural Experiment Station Research Reports
The first low-profile cross-ventilated (LPCV) freestall building was stocked in fall 2005 in North Dakota. There currently are 3 other LPVC freestalls operational and 6 others under construction. The LPCV building offers some of the advantages of natural ventilated and tunnel ventilated freestalls. Natural or conventional tunnel ventilation buildings normally have from 2 to 6 rows of freestalls. The first LPCV building was an 8-row con-figuration, but wider LPCV buildings with 10, 12, 16, or 24 rows of freestalls are being con-sidered. Low-profile cross-ventilated freestall buildings are another option for dairy cattle housing. These facilities allow producers to have more …
Ovarian Responses And Conception Rates In Response To Gnrh, Hcg, And Progesterone (2006), M.A. Portaluppi, D.E. Tenhouse, A. Lloyd, D.R. Eborn
Ovarian Responses And Conception Rates In Response To Gnrh, Hcg, And Progesterone (2006), M.A. Portaluppi, D.E. Tenhouse, A. Lloyd, D.R. Eborn
Kansas Agricultural Experiment Station Research Reports
We hypothesized that increasing concentrations of progesterone after artificial insemination (AI) would increase fertility. Our objective was to assess changes in ovarian structures, incidence of ovulation, and change in serum progesterone in response to GnRH, human chorionic gonadotropin (hCG), or exogenous progesterone (controlled internal drug release; CIDR insert) treatment, beginning 4 to 9 days after AI (d 0) and again 7 days later (Exp. 1). Blood was collected from 753 cows in 3 herds on days 0 and 7. Ovaries of 162 cows in 1 herd were scanned and mapped to confirm the presence a corpus luteum (CL), and cows …
Ovulation Potential Of Human Chorionic Gonadotropin Versus Gnrh (2006), B.S. Buttrey, M.G. Burns, Jeffrey S. Stevenson
Ovulation Potential Of Human Chorionic Gonadotropin Versus Gnrh (2006), B.S. Buttrey, M.G. Burns, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Experiments have shown human chorionic gonadotropin (hCG) to be more effective than GnRH as a means to induce ovulation of folli-cles. Dosages used, however, have differed greatly among experiments. A study was per-formed to determine the minimum effective dose of hCG needed to induce ovulation of ovarian follicles in dairy cows. Ovaries of Holstein cows were mapped by using transrec-tal ultrasonography 7 days before a bi-weekly pregnancy diagnosis. Cows were assigned randomly to treatments of saline, 100 μg of GnRH (2 mL of Fertagyl, Intervet, Inc., Mills-boro, NJ), or 500, 1000, 2000, or 3000 IU of hCG (0.5, 1, 2, …
Milk Quality As A Function Of Temperature-Cycled, Reduced-Fat Milk Stored In Various Size Containers (2006), L.F. Julstron, Karen A. Schmidt
Milk Quality As A Function Of Temperature-Cycled, Reduced-Fat Milk Stored In Various Size Containers (2006), L.F. Julstron, Karen A. Schmidt
Kansas Agricultural Experiment Station Research Reports
Packaged, reduced-fat milk was subjected to a 20 min/day temperature cycle during a 7-day refrigeration period to determine the effect on milk quality. Temperature cycling did not affect the compositional or microbial counts in reduced-fat milk stored in various package sizes. Analysis of headspace compounds during the 7 days of storage, however, showed that benzaldehyde, 2-butanone, 2-heptanone, hexanal, and octanal concentrations significantly changed, indicating that milk flavor was altered. Concentration of heptanal, a compound associated with lipid oxidation, was higher in milk packaged in half-gallon and 1-gallon containers, compared; Dairy Day, 2006, Kansas State University, Manhattan, KS, 2006;