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Kansas Agricultural Experiment Station Research Reports

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Evaluation Of Ruminal Degradability And Lysine Bioavailability Of Four Soybean Meal Products, M.S. Awawdeh, Evan C. Titgemeyer, James S. Drouillard, R. Scott Beyer Jan 2006

Evaluation Of Ruminal Degradability And Lysine Bioavailability Of Four Soybean Meal Products, 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 ...


Efficiency Of Phosphorus Utilization In Dairy Operations, Joseph P. Harner, Michael J. Brouk Jan 2006

Efficiency Of Phosphorus Utilization In Dairy Operations, 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 ...


Influence Of Facilities On Cow Time Budgets, Joseph P. Harner, John F. Smith, Michael J. Brouk Jan 2006

Influence Of Facilities On Cow Time Budgets, 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 ...


Ovarian Responses And Conception Rates In Response To Gnrh, Hcg, And Progesterone, M.A. Portaluppi, D.E. Tenhouse, A. Lloyd, D.R. Eborn Jan 2006

Ovarian Responses And Conception Rates In Response To Gnrh, Hcg, And Progesterone, 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, B.S. Buttrey, M.G. Burns, Jeffrey S. Stevenson Jan 2006

Ovulation Potential Of Human Chorionic Gonadotropin Versus Gnrh, 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 ...


Effects Of Four Soybean Meal Products On Lactational Performance Of Dairy Cows, M.S. Awawdeh, Evan C. Titgemeyer, James S. Drouillard, John E. Shirley Jan 2006

Effects Of Four Soybean Meal Products On Lactational Performance Of Dairy Cows, 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 ...


Characteristics Of Low-Profile Cross-Ventilated Freestalls, Joseph P. Harner, John F. Smith, R. Millner Jan 2006

Characteristics Of Low-Profile Cross-Ventilated Freestalls, 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 ...


Delaying Injection Of Prostaglandin F2Α In An Ovsynch Protocol, M.A. Portaluppi, D.E. Tenhouse, Jeffrey S. Stevenson Jan 2006

Delaying Injection Of Prostaglandin F2Α In An Ovsynch Protocol, M.A. Portaluppi, D.E. Tenhouse, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Our objective was to determine whether delaying the PGF2αinjection by 24 or 48 hr after the first GnRH injection in an Ovsynch protocol (from a standard 7 days) altered ovar-ian characteristics in lactating dairy cows. Es-trous cycles were synchronized in 36 Hol-steins after removal of a progesterone-releasing controlled internal drug release (CIDR) insert and injection of PGF2α. On day 6 of the estrous cycle, cows were administered 100 μg of GnRH (81 ± 2 days postpartum) and assigned randomly to receive a treatment in-jection of PGF2α7, 8, or 9 days later. Timed artificial insemination (TAI) was performed at 48 hr after ...


Resynchronization Of Ovulation And Conception In Nonpregnant Dairy Cows And Heifers, M.A. Portaluppi, D.E. Tenhouse, Jeffrey S. Stevenson Jan 2006

Resynchronization Of Ovulation And Conception In Nonpregnant Dairy Cows And Heifers, M.A. Portaluppi, D.E. Tenhouse, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Our objectives were to determine various factors influencing upfront single and multiple ovulation in response to GnRH in a timed arti-ficial insemination (TAI) protocol and subse-quent fertility after altering timing of the sec-ond GnRH injection and AI relative to PGF2αinjection. Replacement heifers (n = 86) and 613 lactating cows previously inseminated were diagnosed not pregnant at biweekly in-tervals to form 77 breeding clusters spanning 36 months. At not-pregnant diagnosis (day 0), females received 100 μg of GnRH, and they received 25 mg of PGF2α7 days later. Females in 2 treatments received GnRH 48 hr (G48) after PGF2αinjection and TAI at the ...


Evaluate The Efficacy Of "Heat Stress Audits" Of Your Cooling System Through Core Body Temperature, John F. Smith, M. Vanbaale, C. Jamison, R. Rodriguez Jan 2006

Evaluate The Efficacy Of "Heat Stress Audits" Of Your Cooling System Through Core Body Temperature, 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, C. Schmidt, John F. Smith, Joseph P. Harner, Michael J. Brouk Jan 2006

Consumptive Water Usage Of Evaporative Pads, 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 ...


Responses Of Lactating Holstein Cows To Increasing Amounts Of Wet Corn Gluten Feed, John F. Smith, K. Grigsby, Michael J. Brouk Jan 2006

Responses Of Lactating Holstein Cows To Increasing Amounts Of Wet Corn Gluten Feed, 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 ...


Milk Quality As A Funcion Of Temperature-Cycled, Reduced-Fat Milk Stored In Various Size Containers, L.F. Julstron, Karen A. Schmidt Jan 2006

Milk Quality As A Funcion Of Temperature-Cycled, Reduced-Fat Milk Stored In Various Size Containers, 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 ef-fect 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 com-pounds during the 7 days of storage, however, showed that benzaldehyde, 2-butanone, 2-heptanone, hexanal, and octanal concentra-tions 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;


Fresh Cow Health Issues, Jerry D. Olson Jan 2003

Fresh Cow Health Issues, Jerry D. Olson

Kansas Agricultural Experiment Station Research Reports

The post-calving period is a critical time in a cow's life. The first few weeks post-calving pose the highest risk period for a number of diseases including milk fever, mastitis, metritis, pneumonia, retained fetal membranes, ketosis, and displaced abomasum. Post-calving diseases adversely affect dry matter intake, peak milk production, and reproductive performance, in addition to increasing the risk of involuntary culling and death. Consequences of disease can be costly. The ideal strategy is to minimize losses associated with disease by preventing their occurrence. However, even with the best management practices in place, it is impossible to prevent all post-calving ...


Cow Comfort Through The Transition Period, John F. Smith, Joseph P. Harner, Michael J. Brouk Jan 2003

Cow Comfort Through The Transition Period, John F. Smith, Joseph P. Harner, Michael J. Brouk

Kansas Agricultural Experiment Station Research Reports

Managing transition cows is a significant problem on dairy farms. The issues include nutritional considerations, stocking rates, metabolic disorders, heat stress, and access to feed and water. Often management of transition cows is limited to nutritional considerations. Facilities, grouping strategies, stocking rates, heat stress, and access to feed and water also have a dramatic impact on milk production, herd health, culling rates, and reproductive efficiency. Often nutritional benefits can be negated by not managing cow comfort issues. Producers can improve profitability by managing those variables.; Dairy Day, 2003, Kansas State University, Manhattan, KS, 2003;


Transition Cow Nutrition And Management, John E. Shirley Jan 2003

Transition Cow Nutrition And Management, John E. Shirley

Kansas Agricultural Experiment Station Research Reports

Dairy cows are generally provided with a 60-day dry period. The first part of the dry period is called the "far-off dry period" beginning at dry off and continuing until 21 days before projected calving date. The second part of the dry period is called the "close-up dry period" beginning at 21 days before projected calving date and ending at parturition. Diets formulated for far-off dry cows are generally high in forage and are designed to support body maintenance and fetal growth. Rumen function and microbial populations adjust to these diets by the end of the far-off period and require ...


Comparison Of Three Fresh Cow Feeding Programs, W.F. Miller, Evan C. Titgemeyer, A.F. Park, M.V. Burgos Jan 2003

Comparison Of Three Fresh Cow Feeding Programs, W.F. Miller, Evan C. Titgemeyer, A.F. Park, M.V. Burgos

Kansas Agricultural Experiment Station Research Reports

We evaluated the impact on performance of top dressing a based total mixed ration (TMR) with long-stem alfalfa hay with or without additional dry-rolled corn to the lactating cow diet during the first 5 days postpartum. The three dietary treatments and numbers of cows assigned to each diet were: 1) total mixed ration (TMR; n = 19); 2) TMR + long-stem alfalfa hay (TMR + A; n= 20); and 3) TMR + long-stemmed alfalfa hay + dry-rolled corn (TMR + A + C; n = 20). Top dressing the lactating TMR with long-stem alfalfa hay with or without dry-rolled corn did not reduce the incidence of metabolic disorders ...


Developing And Using Monitoring Programs For Fresh Cows, John F. Smith, Joseph P. Harner, Michael J. Brouk Jan 2003

Developing And Using Monitoring Programs For Fresh Cows, John F. Smith, Joseph P. Harner, Michael J. Brouk

Kansas Agricultural Experiment Station Research Reports

Metabolic disorders and related health problems are a significant problem on dairy farms, resulting in increased culling and decreased profitability for producers. Early detection and treatment of disorders and disease is critical in minimizing losses and increasing probability of cow recovery. Fresh cow monitoring systems that evaluate several key factors "“ general appearance, body temperature, intake or appetite, rumen motility, milk production, and milk or urine concentrations of ketones "“ are necessary for early detection of disorders and disease. Most of these problems occur within the first 3 weeks of lactation, with most occurring during the first 10 days. Developing and implementing ...


Effect Of Two New Teat Dip Prepatations On Teat Condition, Somatic Cell Count, And Incidence Of Mastitis Under Natural Exposure, E.L. Burkitt, W.F. Miller, Michael V. Scheffel, Evan C. Titgemeyer Jan 2003

Effect Of Two New Teat Dip Prepatations On Teat Condition, Somatic Cell Count, And Incidence Of Mastitis Under Natural Exposure, E.L. Burkitt, W.F. Miller, Michael V. Scheffel, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

Application of an iodophor teat dip before and after milking is a common practice in the dairy industry as an effective method of preventing mastitis by reducing microbial populations at the teat end. Overall effectiveness of a teat dip is a function of its ability to reduce the microbial population and maintain a pliable teat skin condition. The objective of this study was to evaluate a new conditioning component in iodophor teat dips containing either 0.5% or 1.0% iodine. Two experiments were conducted during late winter (133 cows) and during summer (104 cows) to evaluate two new iodophor ...


Clinical Mastitis Perceptions Of Kansas Dairy Producers, J.R. Roberson Jan 2003

Clinical Mastitis Perceptions Of Kansas Dairy Producers, J.R. Roberson

Kansas Agricultural Experiment Station Research Reports

Mastitis is considered the most costly disease in the U.S. dairy industry. Treatment of clinical mastitis is the major reason for antibiotic contamination of products on U.S. dairy farms. A survey of 183 dairy producers was conducted to determine their perceptions regarding clinical mastitis treatments and what constituted their treatment regimens. Results indicated that 33% of dairy producers used a coliform vaccine, 10% used a Staphylococcus aureus vaccine, and 38% did no prestripping before milking cows. Obtaining a clinical cure (restoration of normal milk) was considered the most important aspect of mastitis treatment success (110/183; 60%) compared ...


Leptospirosis: A New Perspective On An Old Disease, Jerry Olson Jan 2003

Leptospirosis: A New Perspective On An Old Disease, Jerry Olson

Kansas Agricultural Experiment Station Research Reports

Disease causing Leptospira can be placed in one of two broad categories for common domesticated mammals: They are either hostadapted or incidental strains. The four incidental serovars of Leptospira that are pathogenic to cattle are: L. pomona, L. grippotyphosa, L. canicola and L. icterhemmorhagiae. They are transmitted to cattle from other carrier animals that act as hosts for these strains. The strains are found in chronically infected rats, dogs, deer, or even pigs and are transmitted to cattle though urine-contaminated water. When the incidental strains of Leptospira are introduced into an unvaccinated, susceptible herd of cattle, they commonly cause an ...


Small-Sized Milk Processing Plant Considerations, B. Macias Rosario, L. Mcvay, Fadi M. Aramouni, Karen A. Schmidt Jan 2003

Small-Sized Milk Processing Plant Considerations, B. Macias Rosario, L. Mcvay, Fadi M. Aramouni, Karen A. Schmidt

Kansas Agricultural Experiment Station Research Reports

Milk is widely considered one of the world's most valuable foods. As a raw material, it is available in various forms, and is found in an ever-increasing variety of nutritional products. Milk is a complex biological fluid consisting of the following components: water (87.4%), sugar or lactose (4.8%), fat (3.7%), protein (3.4%), minerals (0.7%), as well as minute amounts of vitamins. This document presents the standards, process needs, and labeling requirements of pasteurized fluid milk for the state of Kansas.; Dairy Day, 2003, Kansas State University, Manhattan, KS, 2003;


Increasing Milking Frequency In Fresh Cows: Milk Characteristics And Reproductive Performance, Jeffrey S. Stevenson, John E. Shirley Jan 2003

Increasing Milking Frequency In Fresh Cows: Milk Characteristics And Reproductive Performance, Jeffrey S. Stevenson, John E. Shirley

Kansas Agricultural Experiment Station Research Reports

Increased milking frequency during partial or whole lactations increases milk yields, but generally reduces percentages of milk fat and protein. Because of greater milk volume, total fat and protein are not reduced. Combining bovine somatotropin (bST) with increased milking frequency is additive. In other words, milk increases in response to both factors. In some studies, increased milking frequency during early lactation improves udder health, as evidenced by reduced somatic cell scores. Reproductive efficiency generally declines when examined on whole herd basis. When examined in single herds with or without bST, pregnancy rates may not be reduced because of increased milking ...


Effect Of Soaking And Misting On Respiration Rate, Body Surface Temperature, And Body Temperature Of Heat Stressed Dairy Cattle, Joseph P. Harner, John F. Smith, A.K. Hammond, W.F. Miller Jan 2003

Effect Of Soaking And Misting On Respiration Rate, Body Surface Temperature, And Body Temperature Of Heat Stressed Dairy Cattle, Joseph P. Harner, John F. Smith, A.K. Hammond, W.F. Miller

Kansas Agricultural Experiment Station Research Reports

Reducing heat stress is a key issue for dairy producers. Use of feedline soaking and supplemental airflow effectively reduces heat stress and increases milk production and profitability. High-pressure misting allows water to evaporate in the air, reduces air temperature, and increases relative humidity. Misting also soaks the skin of cattle, resulting in additional cooling as water evaporates from skin surfaces, similar to the cooling effect of feedline soaking. Impact of soaking frequency (5-, 10-, or 15-minute intervals) was compared to continuous high-pressure misting. Cows cooled with either system had lower respiration rates, body surface temperatures, and internal body temperatures than ...


Variations In The Ovsynch Protocol Alter Pregnancy Rates In Lactating Dairy Cows, M.A. Portaluppi, Jeffrey S. Stevenson Jan 2003

Variations In The Ovsynch Protocol Alter Pregnancy Rates In Lactating Dairy Cows, M.A. Portaluppi, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Initiation of the Ovsynch protocol at random stages of the estrous cycle produces differences in synchronization and pregnancy rates. Use of two injections of PGF2αadministered 14 days apart, with the second injection given 12 days before initiating the Ovsynch protocol increased the percentage of cows that start the Ovsynch protocol at a more desirable stage of the estrous cycle (e.g., between days 5 and 13). In this experiment, after applying the Presynch-Ovsynch protocol, timing of the second injection of GnRH and insemination were altered to determine their effect on pregnancy rates. Cows that received the second GnRH injection at ...


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

Comparative Study Of Three Expeller Process Soybean Meals In Diets For Lactating Dairy Cows, 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 ...


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

Diet Digestibility And Rumen Traits In Response To Feeding Wed Corn Gluten Feed And A Pellet Consisting Of Raw Soybean Hulls And Corn Steep Liquor, 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 ...


Milking Frequency, Estradiol Cypionate, And Bst Alters Milk Yield And Reproductive Outcomes In Dairy Cows, 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, 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 ...


Performance Of Dairy Heifers Fed High Forage Diets Supplemented With Bambermycins, Lasalocid Or Monesin, 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, 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 ...


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

Effect Of Tunnel Ventilation And Evaporative Cooling On The Barn Enviroment And Cow Comfort In Midwest Dairy Facilities, 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 ...