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Full-Text Articles in Life Sciences
Opportunities With Low Profilecross Ventilated Freestallfacilities (2008), John F. Smith, Joseph P. Harner, Barry J. Bradford, M.W. Overton
Opportunities With Low Profilecross Ventilated Freestallfacilities (2008), John F. Smith, Joseph P. Harner, Barry J. Bradford, M.W. Overton
Kansas Agricultural Experiment Station Research Reports
Low profile cross ventilated freestall buildings are one option for dairy cattle housing. These facilities allow producers to control the cows' environment during all seasons of the year. As a result, an environment similar to the thermoneutral zone of a dairy cow is maintained during both summer and winter, resulting in more stable core body temperatures. Low profile cross ventilated facilities allow buildings to be placed closer to the parlor, thus reducing the time cows are away from feed and water. Other advantages include a smaller overall site footprint than naturally ventilated facilities and less critical orientation because naturally ventilated …
Resynchronized Pregnancyrates In Dairy Cattle: Timingof Gonadotropin-Releasinghormone Injection Before Timedartificial Insemination (2008), C.A. Martel, Jeffrey S. Stevenson
Resynchronized Pregnancyrates In Dairy Cattle: Timingof Gonadotropin-Releasinghormone Injection Before Timedartificial Insemination (2008), C.A. Martel, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Lactating dairy cows and replacement virgin heifers of unknown pregnancy status were treated with either gonadotropin-releasing hormone (GnRH) or saline to initiate a resynchronization program that was continued 7 days later when a not-pregnant diagnosis was determined. Nonpregnant cattle were administered prostaglandin F2αand then either injected with GnRH 56 hours later and artificially inseminated (AI) by appointment at 72 hours or injected and inseminated concurrently at 72 hours. Injection of GnRH at 56 hours produced more pregnancies than injection of GnRH at 72 hours when AI was administered at 72 hours in both treatments (30.9 vs. 15.2%). Further, starting the …
Estimating Optimal Operationtime Of Korral Kools On Dairycows In A Desert Environment (2008), X.A. Ortiz, John F. Smith, Barry J. Bradford, Joseph P. Harner
Estimating Optimal Operationtime Of Korral Kools On Dairycows In A Desert Environment (2008), X.A. Ortiz, John F. Smith, Barry J. Bradford, Joseph P. Harner
Kansas Agricultural Experiment Station Research Reports
Developing management strategies for Korral Kools will help producers provide cooling in the housing area while minimizing the operational cost of the Korral Kools system. Two experiments were conducted at a dairy in Saudi Arabia to evaluate operational time of Korral Kools for multiparous and primiparous dairy cows. For multiparous cows, running time per day of Korral Kools should be continuous, but for primiparous cows, no difference in performance was detected between 21 and 24 hours. However, producers need to be careful when reducing daily operation time of Korral Kools for primiparous cows because elevated core body temperatures were observed …
Dietary Molasses Enhancesruminal Biohydrogenationand Partially Alleviates Diet-Induced Milk Fat Depression (2008), Barry J. Bradford, Evan C. Titgemeyer
Dietary Molasses Enhancesruminal Biohydrogenationand Partially Alleviates Diet-Induced Milk Fat Depression (2008), Barry J. Bradford, Evan C. Titgemeyer
Kansas Agricultural Experiment Station Research Reports
Milk fat depression remains a problem on dairy farms, and in recent years, incorporation of distillers grains (typically with solubles added and often dried) has contributed to this problem on some farms. In this study, we evaluated whether molasses could prevent milk fat depression in cows fed a high-risk diet. Replacing up to 5% of dietary corn with cane molasses linearly increased the yield of short- and medium-chain fatty acids in milk, indicating a positive effect on de novo fatty acid synthesis in a milk fat depression environment. Molasses, however, tended to linearly decrease milk yield and linearly decreased milk …
Alfalfa Hay Inclusion Ratein Wet Corn Gluten Feed Baseddiets (2008), C.R. Mullins, K.N. Grigsby, Barry J. Bradford
Alfalfa Hay Inclusion Ratein Wet Corn Gluten Feed Baseddiets (2008), C.R. Mullins, K.N. Grigsby, Barry J. Bradford
Kansas Agricultural Experiment Station Research Reports
In this experiment, we evaluated the effects of varying alfalfa inclusion rate in diets containing 31% wet corn gluten feed on a dry matter basis. Eighty lactating Holstein cows were allocated into groups of 10 and assigned to 1 of 8 pens balanced for parity, stage of lactation, and milk yield. Diets were formulated to contain 0, 7, 14, or 21% alfalfa on a dry matter basis. Diets containing greater proportions of alfalfa had less corn silage and soybean meal but more corn grain. Feed intake, milk production, body weight, and body condition score were monitored, and effects of increasing …
High Inclusion Rate Of Wet Corngluten Feed On Performance Oflate-Lactation Holstein Cows:Preliminary Results (2008), D.J. Rezac, K.N. Grigsby, Barry J. Bradford
High Inclusion Rate Of Wet Corngluten Feed On Performance Oflate-Lactation Holstein Cows:Preliminary Results (2008), D.J. Rezac, K.N. Grigsby, Barry J. Bradford
Kansas Agricultural Experiment Station Research Reports
A novel diet formulation strategy incorporating wet corn gluten feed at 47% of diet dry matter was evaluated in late-lactation cows. Diets were formulated for similar protein and energy concentrations with dramatic differences in forage sources. Milk fat and protein concentrations increased with the high wet corn gluten feed inclusion rate, and this diet tended to increase milk fat yield. The preliminary work indicates that very low cost rations incorporating wet corn gluten feed may be formulated to maintain milk production, at least in late-lactation cows.; Dairy Day, 2008, Kansas State University, Manhattan, KS, 2008; Dairy Research, 2008 is known …
Progesterone, Follicular,And Estrual Responses Toprogesterone-Based Estrusand Ovulation Synchronizationprotocols At Five Stages Of Theestrous Cycle (2008), Jeffrey S. Stevenson
Progesterone, Follicular,And Estrual Responses Toprogesterone-Based Estrusand Ovulation Synchronizationprotocols At Five Stages Of Theestrous Cycle (2008), Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
The objective of this study was to monitor changes in ovarian status in heifers exposed to a progesterone insert with or without concurrent gonadotropin-releasing hormone (GnRH) injection. Estrus was manipulated in 283 heifers (31 breeding clusters) by administering GnRH, progesterone, and prostaglandin F2α(PGF2α) at 5 stages of the estrous cycle. Estrus was presynchronized with a progesterone insert for 7 days before PGF2αwas administered 24 hours before insert removal. Successive clusters of heifers were assigned to treatments (2 heifers per treatment) on cycle day 2, 5, 10, 15, and 18. Treatments consisted of a progesterone insert (day 0) for 7 days …
Timed Artificial Insemination Conception Rates In Response To A Progesterone Insert In Lactating Dairy Cows (2007), C.A Martel, B.S. Buttery, M.G. Burns, W.E. Brown
Timed Artificial Insemination Conception Rates In Response To A Progesterone Insert In Lactating Dairy Cows (2007), C.A Martel, B.S. Buttery, M.G. Burns, W.E. Brown
Kansas Agricultural Experiment Station Research Reports
Our objective was to determine the effectiveness of exogenous progesterone in the form of an intravaginal insert (controlled internal drug release, CIDR) in conjunction with an ovulation synchronization protocol in lactating dairy cows. Cows received a Presynch protocol (two injections of prostaglandin F2α[PGF2α] 14 days apart) beginning 30 and 36 days in milk, respectively, in two herds. Cows were inseminated after the second Presynch injection when estrus was detected. Remaining cows were treated with the Ovsynch protocol, and alternate cows were assigned randomly to receive a progesterone insert(CIDR). Blood was collected, and body condition scores (BCS) were assigned to treated …
Impact Of Slope And Pipe Diameter On Flush Plume Design (2007), Joseph P. Harner, John F. Smith, Michael J. Brouk
Impact Of Slope And Pipe Diameter On Flush Plume Design (2007), Joseph P. Harner, John F. Smith, Michael J. Brouk
Kansas Agricultural Experiment Station Research Reports
Manning's equation provides a method to evaluate the flow characteristics of a flush plume system used to move a diluted, sandladen manure stream from a freestall building to sand or solid separation equipment. Evaluation of a 16, 18, and 24-inch plume showed pipe slope is critical in maintaining a 5 feet per second water velocity through the pipe. A 24 inch or larger plume placed on a 0.5% slope is able to obtain water velocity of 5 feet per second if the pump capacity exceeds 3,600 gpm. The flow velocity never reached or exceeded 5 feet per second in a …
Impact Of Separator Efficiency And Removed Solids Moisture Content On Make-Up Water Requirements For Sand Recovery (2007), Joseph P. Harner, John F. Smith, Michael J. Brouk
Impact Of Separator Efficiency And Removed Solids Moisture Content On Make-Up Water Requirements For Sand Recovery (2007), Joseph P. Harner, John F. Smith, Michael J. Brouk
Kansas Agricultural Experiment Station Research Reports
Separator efficiency and moisture content of separated solids influence the make-up water requirements on a dairy seeking to utilize recycled water for sand reclamation. Additional water requirements range from 0 to 79 gallons/cow per day depending on the efficiency of the solid to liquid separation process. Make-up water includes any water stored in a containment structure, excluding urine. Final moisture content of the separated solids had marginal impact on the additional water requirements.; Dairy Day, 2007, Kansas State University, Manhattan, KS, 2007; Dairy Research, 2007 is known as Dairy Day, 2007
Ability Of Low Profile Cross-Ventilated Freestall Barns To Improve Environmental Conditions For Dairy Cattle (2007), John F. Smith, Joseph P. Harner, Michael J. Brouk
Ability Of Low Profile Cross-Ventilated Freestall Barns To Improve Environmental Conditions For Dairy Cattle (2007), John F. Smith, Joseph P. Harner, Michael J. Brouk
Kansas Agricultural Experiment Station Research Reports
Recently, there has been interest in constructing mechanical ventilation with evaporative pads to improve the environmental conditions for cows during periods of heat stress. Low profile cross-ventilated freestalls with evaporative pads (LPCV) have become a popular system. The purpose of this study was to evaluate how well these LPCV systems improve the temperature-humidity index (THI) under different ambient conditions. As ambient humidity increases, ability of the LPCV to reduce THI is decreased. Producers wishing to construct LPCV barns should carefully evaluate the climate in which they want to construct LPCV structures.; Dairy Day, 2007, Kansas State University, Manhattan, KS, 2007; …
Human Chorionic Gonadotropin And Gnrh Effects On Pregnancy Survival In Pregnant Cows And Resynchronized Pregnancy Rates (2007), B.S. Buttery, M.G. Burns, Jeffrey S. Stevenson
Human Chorionic Gonadotropin And Gnrh Effects On Pregnancy Survival In Pregnant Cows And Resynchronized Pregnancy Rates (2007), B.S. Buttery, M.G. Burns, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Experiments have shown human chorionic gonadotropin (hCG) to be more effective than gondadotropin releasing hormone (GnRH) as a means to ovulate follicles. Experiment 1 determined the effects of replacing the first injection of GnRH (day 7) with hCG or saline in a Resynch-Ovsynch protocol on pregnancy rates in cows subsequently diagnosed not pregnant and pregnancy survival in cows subsequently diagnosed pregnant (day 0). A second study determined the ovulation potential of hCG compared with GnRH and saline (Exp. 2). In Exp. 1, cows in 4 herds were assigned randomly based on lactation number, number of previous AI, and last test-day …
Detection Of Noncyling Cows By Heatmount Detectors And Ultrasound Before Treatment With Progesterone (2007), D.E. Tenhouse, R.L. Krisher, G.C. Lamb, C.R. Dahlen, D.J. Brusveen, M. Burkhart, R.S. Youngquist, H.A. Garverick, Jeffrey S. Stevenson
Detection Of Noncyling Cows By Heatmount Detectors And Ultrasound Before Treatment With Progesterone (2007), D.E. Tenhouse, R.L. Krisher, G.C. Lamb, C.R. Dahlen, D.J. Brusveen, M. Burkhart, R.S. Youngquist, H.A. Garverick, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Our objective was to determine accuracy of identifying anovulatory lactating dairy cows before the application of a timed AI protocol [with or without progesterone supplementation via a controlled internal drug release (CIDR) insert and 2 different timings of AI] by using heatmount detectors and a single ovarian ultrasound examination. At 6 Midwest locations, 1,072 cows were enrolled in a Presynch protocol (2 injections of prostaglandin F2α(PGF2α) 14 days apart) with the second injection administered 14 days before initiating the Ovsynch protocol (injection of gonadotropin releasing hormone (GnRH) 7 days before and 48 hours after PGF2αinjection, with timed AI at 0 …
Application Of The Progesterone (Cidr) Insert In Artificial Insemination Programs Of Dairy Cattle (2007), Jeffrey S. Stevenson
Application Of The Progesterone (Cidr) Insert In Artificial Insemination Programs Of Dairy Cattle (2007), Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Use of progesterone inserts (controlled interval drug release, CIDR) offers another option for synchronizing estrus and ovulation in replacement heifers and lactating dairy cows. Results indicate that heifers may be inseminated after detected estrus, at a fixed time (timed AI), or a combination of both. Conception rates exceed 50% in both scenarios. Practical applications of the CIDR in lactating cows have been used to resynchronize the return estrus of previously inseminated cows and as part of first-service AI-breeding protocols. Use for resynchronization has no drawbacks in previously inseminated cows, but may increase embryo survival during the first 30- to 60-days …
Nutritional Strategies For A Healthy Transition To Lactation: An Update (2007), Barry J. Bradford
Nutritional Strategies For A Healthy Transition To Lactation: An Update (2007), Barry J. Bradford
Kansas Agricultural Experiment Station Research Reports
Reducing cull rates and improving fertility in early lactation has a dramatic effect on the profitability of many dairies. Continuing research on transition cow nutrition has led to the development of an array of nutritional strategies to prevent disorders during the transition period. It is important, however, to realize that some of these strategies have similar modes of action, and as such, their effects are not likely to be additive. Producers should work with their nutritionist and veterinarian to identify the most prevalent transition problems in the herd and review options for preventing those disorders.; Dairy Day, 2007, Kansas State …
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;
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 …
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 …
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, …
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 …
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 …
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 …
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 …
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 …
Impact Of Frequency Of Feedline Soaking Combined With Evaporative Air Cooling In A Humid Environment, John F. Smith, D.V. Armstrong, M. J. Vanbaale, D.R. Bray
Impact Of Frequency Of Feedline Soaking Combined With Evaporative Air Cooling In A Humid Environment, John F. Smith, D.V. Armstrong, M. J. Vanbaale, D.R. Bray
Kansas Agricultural Experiment Station Research Reports
Heat stress in hot and humid environments reduces milk production, decreases reproduction, and increases health-related problems. The summertime environment in north-central Florida is especially difficult because the combination of high relative humidity and high temperature results in a temperaturehumidity index (THI) above the critical value of 72 for significant portions of the day. Previous work at Kansas State University had shown that the combination of soaking and evaporative air cooling could effectively cool heat-stressed cattle. Effectiveness of this feedline soaking, either in the afternoon and at night, or only at night, in combination with evaporative cooling was evaluated on a …
Serological Responses In Dairy Calves To Various Vaccines Administered Via Needle-Free Or Conventional Needle-Based Injections, Larry C. Hollis, John F. Smith, B.J Johnson, Sanjay Kapil
Serological Responses In Dairy Calves To Various Vaccines Administered Via Needle-Free Or Conventional Needle-Based Injections, Larry C. Hollis, John F. Smith, B.J Johnson, Sanjay Kapil
Kansas Agricultural Experiment Station Research Reports
One hundred and four, 5- to 10-month-old Holstein heifers and steers were blocked by age within gender and randomly assigned to treatments. Calves were vaccinated with 5- way modified-live respiratory viral vaccine, Mannheimia hemolytic bacterin/toxoid, and 5- way Leptospira bacterin, administered via either needle-free or conventional needle-andsyringe injection techniques. Blood samples were collected from all calves at the time of vaccination and 21 days later. Blood sera were analyzed for antibody titers to infectious bovine rhinotracheitis (IBR) virus as the indicator of serological response to the 5-way viral vaccine, to Leptospira pomona (LP) as the indicator of serological response to …
Kansas Farm Management Association Enterprise Analysis: Examining Differences Among High-, Medium-, And Low-Profit Dairy Operations, Kevin C. Dhuyvetter, Terry L. Kastens
Kansas Farm Management Association Enterprise Analysis: Examining Differences Among High-, Medium-, And Low-Profit Dairy Operations, Kevin C. Dhuyvetter, Terry L. Kastens
Kansas Agricultural Experiment Station Research Reports
Thirty-one dairy producers participated in the Kansas Farm Management Association (KFMA) dairy enterprise analysis each year from 2002 to 2004. The dairy farms were sorted based on 3-year average returns over total costs and were categorized as high-, medium-, and low-profit farms. The highestprofit farms earned an average of $795 more per cow ($4.20 per cwt of milk) than the lowprofit farms earned. High-profit farms averaged $521 more milk sales per cow than lowprofit farms did. This difference in profitability was due entirely to greater milk production, inasmuch as milk prices among profit groups did not differ from each other. …
Update On Ovulation-Control Programs For Artificial Insemination Of Lactating Dairy Cows, Jeffrey S. Stevenson
Update On Ovulation-Control Programs For Artificial Insemination Of Lactating Dairy Cows, Jeffrey S. Stevenson
Kansas Agricultural Experiment Station Research Reports
Use of timed AI programs has become commonplace on most dairy farms either because cows are not watched sufficiently to detect estrus, or because expression of estrus is limited by confinement housing. A number of programs are available to set up firstpostpartum inseminations that include some timed AI or timed AI of all cows once the end of voluntary waiting period (VWP) is reached. One approach may include a period of heat detection and AI until, for example, 100 days in milk, when a timed AI protocol is applied to all previously non-inseminated cows. Another approach includes injections of prostaglandin …