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- Cattlemen's Day (38)
- Swine day (22)
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- 1997 (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Alfalfa; Silage; Inoculant; Preservation; Nutritive value (1)
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- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Artificial insemination; Synchronization; Ultrasound; Conception; Embryonic death (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Beef carcasses; Antimicrobial treatment; Steam pasteurization (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Beef steers; Protein; Starch; Supplements; Ruminal fermentation (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Breeds; Carcasses; Retail product (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Bull prices; Bull EPD; Bull marketing (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Conservation Reserve Program; Cow/Calf grazing; Stocker grazing (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Cows; Forage; Urea; Performance (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Estrus synchronization; AI; GnRH; PGF2; Norgestomet (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Feeder cattle; Weaning; Pre-conditioning; Economics (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Forage; In situ analysis; Protein; Degradable intake protein (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Geographic markets for cattle; Beef packers; Packer concentration (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; GnRH; PGF2; Norgestomet; Timed breeding; Anestrous suckled cows; Induced ovulation (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Grain sorghum; Particle size; Processing; Digestibility; Enzyme; Growing cattle (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Grass; Smooth brome; Eastern Gama; Silage (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Growth implant; Revalor-G; Ralgro; Synovex; Heifers; Pasture (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Implant; Calves; Replacement heifers; Conception rate (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Liquid smoke; Escherichia coli O157:H7; Ground beef (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Liquid smoke; Warmed-over flavor; Precooked beef patties (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Milking; Suckling; Calf presence; Anestrus (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Packaging; Beef steaks; Shelf life (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Protein degradability; Proteases; Forages (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Protein requirements; Restricted feeding; Steers (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Ralgro; Synovex; Synovex Plus; Pasture; Finishing; Carcass; Implants (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Replacement heifers; Culling; Artificial insemination; Economics (1)
- 1997; Kansas Agricultural Experiment Station contribution; no. 97-309-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 783; Beef; Silage; Top spoilage; Silo; Bunker silo; Trench silo; Pile silo (1)
Articles 61 - 80 of 80
Full-Text Articles in Life Sciences
Effects Of Starch Gelatinization On Weanling Pig Performance (1997), K Hongtrakul, J R. Bergstrom, W B. Nessmith Jr, I H. Kim, Robert D. Goodband, Keith C. Behnke, Jim L. Nelssen, Michael D. Tokach
Effects Of Starch Gelatinization On Weanling Pig Performance (1997), K Hongtrakul, J R. Bergstrom, W B. Nessmith Jr, I H. Kim, Robert D. Goodband, Keith C. Behnke, Jim L. Nelssen, Michael D. Tokach
Kansas Agricultural Experiment Station Research Reports
Two hundred and ten weanling pigs were fed diets containing nonextruded corn (14.5% gelatinization; control) or corn that was extruded to provide 38.7%, 52.7%, 64.4%, or 89.3% starch gelatinization in the complete diet. With increasing gelatinization, ADG and ADFI decreased and then increased. but apparent digestibility of DM, CP, and energy increased then decreased. These results suggest that the degree of starch gelatinization has an inconsistent effect on weanling pig performance.; Swine Day, Manhattan, KS, November 20, 1997
Pyridoxine, But Not Thiamin, Improves Growth Performance Of Weanling Pigs (1997), J C. Woodworth, R E. Musser, J A. Loughmiller, S A. Moser, G S. Grinstead, P R. O'Quinn, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach
Pyridoxine, But Not Thiamin, Improves Growth Performance Of Weanling Pigs (1997), J C. Woodworth, R E. Musser, J A. Loughmiller, S A. Moser, G S. Grinstead, P R. O'Quinn, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach
Kansas Agricultural Experiment Station Research Reports
Two trials were conducted to determine whether pyridoxine or thiamine needs to be added to the diet for weanling pigs. In the first trial, weanling pigs were fed either a control diet or diets containing added thiamin (2.5 or 5.0 g/ton) or pyridoxine (3.5 or 7.0 g/ton). From d 0 to 14 after weaning, pigs fed added pyridoxine had increased ADG and ADFI, with pigs fed 3.5 g/ton of added pyridoxine having the greatest response. Growth performance was not improved by added thiamin. In a second trial, weanling pigs were fed a control diet or diets containing 1, 2, 3, …
Effects Of Source And Level Of Added Chromium On Growth Performance Of Starter Pigs (1997), P R. O'Quinn, R E. Musser, K Q. Owen, S A. Blum, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband
Effects Of Source And Level Of Added Chromium On Growth Performance Of Starter Pigs (1997), P R. O'Quinn, R E. Musser, K Q. Owen, S A. Blum, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband
Kansas Agricultural Experiment Station Research Reports
A 35-d growth trial was conducted with conventionally weaned nursery pigs to evaluate the efficacy of supplemental chromium (Cr) as either chromium nieotinate (CrNic) or chromium picolinate (CrPic). Neither source nor level of supplemental Cr had any effect on weanling pig growth performance or immune status. Equal levels of CrNic and CrPic produced similar results, except that pigs fed CrPic had higher serum Cr concentrations than pigs fed CrNic. These data suggest no beneficial responses to supplemental CrNic or CrPic in nursery pig diets.; Swine Day, Manhattan, KS, November 20, 1997
Effects Of A High Protein, Whey Protein Concentrate And Spray-Dried Animal Plasma On Growth Performance Of Weanling Pigs (1997), G S. Grinstead, J C. Woodworth, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach
Effects Of A High Protein, Whey Protein Concentrate And Spray-Dried Animal Plasma On Growth Performance Of Weanling Pigs (1997), G S. Grinstead, J C. Woodworth, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach
Kansas Agricultural Experiment Station Research Reports
A 35-d experiment was conducted to compare the effects of increasing spray-dried animal plasma and a high protein whey concentrate (73% CP) on starter pig performance. Spray-dried animal plasma and whey protein concentrate replaced dried skin1 milk on an equal lysine basis. Pigs fed increasing spray-dried animal plasma protein had increased ADG and ADFI from d 0 to 7 after weaning, but not for any other period in the study. Increasing whey protein concentrate had no effect on growth perforn1ance in relation to the pigs fed dried skim milk.; Swine Day, Manhattan, KS, November 20, 1997
Effects Of Sorghum Genotype And Processing Method On Production Characteristics And Growth Performance Of Nursery Pigs (1997), J R. Froeschner, Z J. Cheng, Joe D. Hancock, Keith C. Behnke
Effects Of Sorghum Genotype And Processing Method On Production Characteristics And Growth Performance Of Nursery Pigs (1997), J R. Froeschner, Z J. Cheng, Joe D. Hancock, Keith C. Behnke
Kansas Agricultural Experiment Station Research Reports
Three sorghum varieties that varied in starch composition were fed to Phase II and Phase III pigs to determine if feeding sorghum high in waxiness provided a benefit. In addition, each variety was fed as a meal, standard pellet, and an expanded pellet. As level of waxiness increased, pellet durability index increased numerically and the amount of fines produced decreased numerically. In addition, thermal processing of the diets increased the feeding value. Sorghum genotype had little effect on pig performance.; Swine Day, Manhattan, KS, November 20, 1997
Determining The Optimal Tryptophan:Lysine Ratio For The Segregated Early-Weaned Pigs (25 To 50 Lb) (1997), J A. Loughmiller, D A. Knabe, K Hongtrakul, S Moser, C Civis, P R. O'Quinn, J W. Smith Ii, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband
Determining The Optimal Tryptophan:Lysine Ratio For The Segregated Early-Weaned Pigs (25 To 50 Lb) (1997), J A. Loughmiller, D A. Knabe, K Hongtrakul, S Moser, C Civis, P R. O'Quinn, J W. Smith Ii, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband
Kansas Agricultural Experiment Station Research Reports
A 21 d growth trial was conducted to evaluate the effects of increasing the apparent digestible tryptophan:lysine ratio on growth performance of the 25 to 50 lb pig raised in a high-health, segregated early-weaning (SEW) system. Ten diets were fed with two levels of lysine (.75% and 1.10% apparent digestible lysine) and five apparent digestible tryptophan levels (13, 16, 19, 22, or 25% of lysine). Feeding the high dietary lysine consistently improved ADG and FIG and reduced ADFI. Increasing the tryptophan: lysine ratio did not improve overall performance. Based upon our results, the dietary tryptophan level to maximize growth performance …
Historical Economic Returns To Alternative Swine Enterprises In Kansas (1997), R Jones, Michael R. Langemeier
Historical Economic Returns To Alternative Swine Enterprises In Kansas (1997), R Jones, Michael R. Langemeier
Kansas Agricultural Experiment Station Research Reports
This study examines historical net returns to average Kansas swine producers over the past 16 years. Swine production has been a profitable enterprise. As expected, average returns per head have been higher for farrow-to-finish producers than for feeder pig finishers, and farrow-to-finish producers have nearly always been able to at least cover variable costs of production.; Swine Day, Manhattan, KS, November 20, 1997
Freestall Design And Management For Cow Comfort, John F. Smith, G. A. Jones, Joseph P. Harner
Freestall Design And Management For Cow Comfort, John F. Smith, G. A. Jones, Joseph P. Harner
Kansas Agricultural Experiment Station Research Reports
The design and management of freestall 4) air or vision. facilities are critical in maintaining cow comfort and high milk production. Dairy produc- Lunge Space ers should be conscious of the factors affecting cow comfort in freestall facilities. These The first reason a freestall may fail is lack factors include: ventilation, water availability, of lunge space. A cow needs forward or side feed availability, stall design, and stall bed- lunge space to maneuver in and out of the stall ding. Dairy producers should strive to have easily. There should be no obstructions in lactating cows standing to be milked; standing …
Biosecurity In The Dairy, Gerald L. Stokka, Thomas R. Falkner, Patrick Bierman
Biosecurity In The Dairy, Gerald L. Stokka, Thomas R. Falkner, Patrick Bierman
Kansas Agricultural Experiment Station Research Reports
Three strategies exist to control unwanted disease in a livestock operation: 1) prevent the douintroduction of infected cattle, 2) raise the overall level of resistance and specific resistance to infectious disease, and 3) minimize herd exposure to infectious disease. In addition, if unwanted disease exists in the herd, then a plan to eliminate the disease should be implemented. Maintenance of closed herds, testing procedures, vaccination schedules, sanitation, and good husbandry practices are integral parts of biosecurity procedures. The procedures in place should produce a benefit in terms of both economics and public perception that the quality and safety of our …
Steam Pasteurization To Reduce Bacterial Populations On Commercially Slaughtered Beef Carcasses, D.E. Schafer, Curtis L. Kastner, Randall K. Phebus, Abbey L. Nutsch
Steam Pasteurization To Reduce Bacterial Populations On Commercially Slaughtered Beef Carcasses, D.E. Schafer, Curtis L. Kastner, Randall K. Phebus, Abbey L. Nutsch
Kansas Agricultural Experiment Station Research Reports
A steam pasteurization system (SPS) has been shown in laboratory and commercial evaluations to effectively reduce bacterial populations on freshly slaughtered beef. Our study evaluate d the bactericidal uniformity of SPS. Samples were collected from the five anatomical locations, one per carcass, 40 samples per location , so that 200 carcasses were evaluated before and 200 after pasteurization. Each carcass was sampled by wiping a 300 c m2 area of the specified location with a moist, sterile sponge. For all locations, the total aerobic plate count (APC) after pasteurization was lower (P#.01). Before pasteurization, the midline was contaminate d most …
Ultrasound Versus Convection Cooking Of Beef Longissimus And Pectoralis Muscles, F.W. Pohlman, J.F. Zayas, Michael E. Dikeman, John A. Unruh
Ultrasound Versus Convection Cooking Of Beef Longissimus And Pectoralis Muscles, F.W. Pohlman, J.F. Zayas, Michael E. Dikeman, John A. Unruh
Kansas Agricultural Experiment Station Research Reports
Longissimus and pectoralis muscles were removed from 10 steer carcasses at 4 days postmortem , aged for 14 days at 4 ÌŠF, then assigned to either ultrasound (ULS) or convection (Conv) cooking to either 144 or 15 8 ÌŠF internal temperature. Ultrasound cooking was faster (P<.05), had greater (P<.05) moisture retention and less (P<.05) cooking loss, and used less energy (P<.05). It also produced muscle samples that required less (P<.05) peak force to shear than those from Conv cooking and resulted in superior (P<.05) myofibrillar tenderness. No significant interactions occurred among cooking method, muscle, or endpoint temperature. As expected, longissimus (ribeye) muscles cooked faster (P< .05) and required less (P<.05) energy and were superior (P<.05) in instrumentally measured texture and sensory tenderness than pectoralis muscles. Cooking to 158EF caused greater (P<.05) moisture and cooking losses, required more (P<.05) time and energy, and degraded (P<.05) instrumental textural and sensor y characteristics. Ultrasound offers a new cooking mode that could increase cooking speed, improve energy efficiency and improve some textural characteristics, compared to conventional cooking.
The Effect Of Vitamin E, Selenium, And Copper Supplementation Preweaning On The Performance And Immune Response Of Beef Calves, C.L. Wright, L.R. Corah, Gerald L. Stokka, Frank Blecha, G. Lynch
The Effect Of Vitamin E, Selenium, And Copper Supplementation Preweaning On The Performance And Immune Response Of Beef Calves, C.L. Wright, L.R. Corah, Gerald L. Stokka, Frank Blecha, G. Lynch
Kansas Agricultural Experiment Station Research Reports
Two experiments were conducted to determine the effect of vitamin E, selenium, and copper supplementation on the pre- and postweaning performance, immune responses, and serum metabolites o f crossbred beef calves. In experiment 1, 71 calves were blocked by weight and allotted to one of four individually fed treatments: 1) control supplement (2 lb grain creep ) (CS), 2) CS + .27 mg selenium + 500 IU vitamin E, 3) CS + 9.1 mg copper, and 4) combination of treatments 2 and 3. In experiment 2, 80 crossbred beef calves were blocked by weight and allotted to 5 individually fed …
Summary Of Grazing Research On Kansas Crp Land, Michael R. Langemeier, P.D. Ohlenbusch, R.D. Jones
Summary Of Grazing Research On Kansas Crp Land, Michael R. Langemeier, P.D. Ohlenbusch, R.D. Jones
Kansas Agricultural Experiment Station Research Reports
Animal performance and n et return per acre were examined for four CRP research sites in Kansas in 1 994, 1995, and 1996. Both mowing and prescribed burning increased animal performance in 1994. Mowing was economically feasible on one of the four sites. Prescribed burning was economically feasible on three of four sites. Mowing and burning treatments were not repeated i n 1995 or 1996. Net returns per acre for the site that was grazed with cowcalf pairs ranged from -$8.55 to -$25.54. For the sites grazed with stockers, net returns per acre varied from -$18.67 to $31 .39. Net …
Effect Of Supplement Strategy On Intake And Digestion Of Prairie Hay By Beef Steers, R.H. Greenwood, C.A. Loest, Evan C. Titgemeyer, James S. Drouillard
Effect Of Supplement Strategy On Intake And Digestion Of Prairie Hay By Beef Steers, R.H. Greenwood, C.A. Loest, Evan C. Titgemeyer, James S. Drouillard
Kansas Agricultural Experiment Station Research Reports
The effects of supple mental corn (4 lb/day), rumen-protected methionine (4.25 grams DL-methionine per day), or a cooked molasses block (1 lb/day) on intake and digestion of prairie hay were measured i n beef steers. Steers that consumed the cooked molasses block ate more forage than control steers, whereas forage intake was decreased by supplemental corn. Total tract organic matter digestion, expressed as a percent of intake, was numerically greatest for steers consuming the cooked molasses block. Digestible organic matter intake, a rough estimate of energy available to the steers, was unaffected by methionine but was increased by supplementation of …
Effect Of Urea Level In Protein Supplements On Performance By Beef Cows Consuming Low-Quality, Tallgrass-Prairie Forage, B.C. Woods, R.C. Cochran, C.P. Mathis, J.S. Heldt, K. C. Olson, Evan C. Titgemeyer, David M. Grieger
Effect Of Urea Level In Protein Supplements On Performance By Beef Cows Consuming Low-Quality, Tallgrass-Prairie Forage, B.C. Woods, R.C. Cochran, C.P. Mathis, J.S. Heldt, K. C. Olson, Evan C. Titgemeyer, David M. Grieger
Kansas Agricultural Experiment Station Research Reports
One hundred thirty two Hereford x Angus cows grazing tallgrass-prairie range during winter were used to evaluate the effects of varying the amount of supplemental degradable intake protein (DIP) derived from urea on cow and calf performance. Treatment groups were: 0, 15, 30, and 45% of the supplemental DIP from urea. Supplements were formulated to contain 30% crude protein (CP), with approximately 70% of the CP being DIP. Palatability was not a significant problem within the range of urea inclusion tested. In general, prepartum weight and condition losses were greater with increasing levels of urea, although the magnitude of condition …
Effect Of Bacterial Inoculants On The Fermentation And Preservation Efficiencies And Nutritive Value Of Alfalfa Silage For Growing Steers, K.K. Bolsen, G.L. Huck, M.K. Siefers, J.E. Turner, S.A. Anderson, J.S. Pendergraft, Matthew A. Young, Ronald V. Pope
Effect Of Bacterial Inoculants On The Fermentation And Preservation Efficiencies And Nutritive Value Of Alfalfa Silage For Growing Steers, K.K. Bolsen, G.L. Huck, M.K. Siefers, J.E. Turner, S.A. Anderson, J.S. Pendergraft, Matthew A. Young, Ronald V. Pope
Kansas Agricultural Experiment Station Research Reports
Two silage bacterial inoculants from Pioneer Hi-Bred International, Inc. were evaluated using second-cutting alfalfa. The Pioneer brand 1174® inoculant and a Pioneer experimental inoculant each increased the rate and efficiency of the ensiling process in both farm-scale and laboratory-scale silos. The two inoculants increase d the DM recovery in the farm-scale silos compared to the untreated silage. Steers fed the experimental inoculant-treated silage gained faster (P<. 10) (2.56 vs. 2.37 lb per day), had a 4.0% higher DM intake, and were 4.3% more efficient than steers fed the untreated silage. The 1174-treated silage supported a numerically but not statistically better steer performance than the control silage. When the DM recovery results were combined with the feed per gain results, the silages with 1174 and experimental inoculant produced 5.3 and 10.5 lb more steer gain per ton of crop ensiled, respectively, than the control silage.
K-State Turfgrass Research 1997, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service
K-State Turfgrass Research 1997, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service
Kansas Agricultural Experiment Station Research Reports
With our staff at full strength, several new research projects have been initiated for the 1997 season. As always, we are anxious to hear your suggestions for research that can be done to improve our ability to maintain healthy turf in Kansas.
Development And Use Of Recombinant Gonadotropin-Releasing Hormone Vaccines To Sterilize Cattle: A Review (1997), J. Greer, Timothy G. Rozell
Development And Use Of Recombinant Gonadotropin-Releasing Hormone Vaccines To Sterilize Cattle: A Review (1997), J. Greer, Timothy G. Rozell
Kansas Agricultural Experiment Station Research Reports
A possible alternative to conventional castration methods is the use of vaccines that can be injected in order to sterilize animals. One promising approach involves the use of a vaccine that causes cattle to produce an immune response against one of their own reproductive hormones, gonadotropin releasing hormone (GnRH). Immunization against GnRH results in a decrease in the amount of GnRH circulating within the animal's blood. Therefore, follicle stimulating hormone (FSH) and luteinizing hormone (LH) are not stimulated to be released, and, subsequently their levels required for reproductive function. Experimentation has shown that immunization against GnRH can effectively block reproductive …
Conception And Pregnancy Rates In Dairy Cows After Various Programmed Breeding Systems (1997), Jeffrey S. Stevenson, K. E. Thompson, Y. Kobayashi
Conception And Pregnancy Rates In Dairy Cows After Various Programmed Breeding Systems (1997), Jeffrey S. Stevenson, K. E. Thompson, Y. Kobayashi
Kansas Agricultural Experiment Station Research Reports
Two experiments were conducted to measure conception and pregnancy rates in lactating dairy cows after various treatments followed by artificial insemination (AI) after detected estrus or at one fixed time. In Experiment 1, Holstein cows in one herd were assigned randomly to four treatments every 3 wk (27, 3-wk cluster groups): 1)Ovsynch33, 2) GnRH+PGF2α, 3) 2xPGF2α, and 4) 2xPGF2α+GnRH. In Experiment 2, Holstein cows in one herd were assigned randomly to two treatments every 3 wk (14, 3-wk cluster groups): 1) Ovsynch48 and 2) GnRH+PGF2α. In both experiments, frozen-thawed semen from multiple sires was used, one technician performed >95% of …
Synchronization Of Estrus And Ovulation In Dairy Heifers Using Norgestomet, Gnrh, And Pgf2Α (1997), Jeffrey S. Stevenson, K. E. Thompson, John F. Smith, D. E. Hawkins
Synchronization Of Estrus And Ovulation In Dairy Heifers Using Norgestomet, Gnrh, And Pgf2Α (1997), Jeffrey S. Stevenson, K. E. Thompson, John F. Smith, D. E. Hawkins
Kansas Agricultural Experiment Station Research Reports
Two experiments were performed using the same treatments. All heifers received two injections of PGF2α 14 days apart. Controls then were inseminated after detected estrus. Heifers assigned to the two treatments also received 6 mg of norgestomet for 8 days beginning 7 days before the second of two PGF2α injections. The heifers in the last treatment also received GnRH 48 hr after the second PGF2α injection to induce ovulation in any heifer not observed in estrus before a fixed-time insemination at 72 hr after PGF2α. In Experiment 1, any control heifer or herifer in the two treatments not detected in …