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Full-Text Articles in Life Sciences
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 …
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; …
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 …
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 …
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 …
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 …
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 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