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Kansas Agricultural Experiment Station Research Reports

Animal Sciences

2001

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Articles 1 - 30 of 80

Full-Text Articles in Life Sciences

Resynchronization Of Estrus With Progesterone And Estrogen In Previously Inseminated Beef Cows, M.A. Medina-Britos, A.M. Richardson, G.C. Lamb, B.A. Hensley, T.J. Marple, Jeffrey S. Stevenson, Sandra K. Johnson Jan 2001

Resynchronization Of Estrus With Progesterone And Estrogen In Previously Inseminated Beef Cows, M.A. Medina-Britos, A.M. Richardson, G.C. Lamb, B.A. Hensley, T.J. Marple, Jeffrey S. Stevenson, Sandra K. Johnson

Kansas Agricultural Experiment Station Research Reports

A study was conducted in 609 beef cows to determine whether or not estrus might be resynchronized in previously inseminated beef cows to accommodate a second artificial insemination (AI) early in the breeding season. Previously inseminated cows were treated for 7 days with progesterone (via a previously used intravaginal progesterone-releasing insert [CIDR]) beginning 13 days after AI. In addition, injections of estrogen (estradiol benzoate [EB] or estradiol cypionate [ECP]) were given at insertion and removal of the CIDR insert. Rates of return to estrus and total pregnancy rates were increased after treatments with progesterone and estrogen compared with controls. No …

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Temperature Accuracy Of An Electric Belt Grill, A Forced-Air Convection Oven, And An Electric Broiler, T.E. Lawrence, D.A. King, Michael E. Dikeman Jan 2001

Temperature Accuracy Of An Electric Belt Grill, A Forced-Air Convection Oven, And An Electric Broiler, T.E. Lawrence, D.A. King, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

We evaluated the temperature variation of an electric belt grill set at four temperatures, a forced-air convection oven set at three temperatures, and an electric broiler that has no temperature control. After finding that the actual temperatures of the electric belt grill and the forced-air convection oven were higher than the targeted temperature, we used regression techniques to correct for the temperature biases of both cooking methods. The forced-air convection oven was very precise when the doors were kept closed, as was the electric belt grill after adjustments were made. Temperature of the electric broiler was not consistent across surface …

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Motivation Factors For Beef Processor-Producer Linkages, J.D. Lawrence, M.L. Hayenga, Ted C. Schroeder Jan 2001

Motivation Factors For Beef Processor-Producer Linkages, J.D. Lawrence, M.L. Hayenga, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

A survey was conducted of the 15 largest beef processors to identify the mix of procurement practices being used and to understand reasons motivating recent processorproducer linkages. Processors are shifting away from cash-market live, fed-cattle trade, which represents only 36% of cattle procured by survey respondents in 1999. Processorowned cattle feeding represents only approximately 5%, where it has been for more than a decade. Various other forms of pricing such as carcass weight, grid, and formula represented the largest portion of purchases at 49%. Processors indicated the two most important reasons they get involved in contracts and marketing agreements with …

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Response Of Holstein Steers Fed A Soybean Hull-Based Diet To Amino Acid Supplementation When The Methionine Requirement Was Met, B.D. Lambert, C.A. Löest, Evan C. Titgemeyer Jan 2001

Response Of Holstein Steers Fed A Soybean Hull-Based Diet To Amino Acid Supplementation When The Methionine Requirement Was Met, B.D. Lambert, C.A. Löest, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

A study was conducted to determine the response to amino acid supplementation when the first limiting amino acid (methionine) was provided in excess. Three ruminally cannulated Holstein steer calves (281 lb) were fed 4.8 lb of a soybean hullbased diet (87% soyhulls and 8% wheat straw) daily. Methionine is the first limiting amino acid on diets of this type, and all steers were abomasally infused with 10 g/day of methionine to ensure that this requirement was met. Treatments consisted of increasing amounts (100, 250, or 400 g/day) of an amino acid mixture supplied abomasally. Calves received decreasing amounts of supplemental …

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Branched-Chain Amino Acids For Growing Cattle Limit-Fed Diets Based On Soybean Hulls, C.A. Löest, B.D. Lambert, A.M. Trater, Evan C. Titgemeyer Jan 2001

Branched-Chain Amino Acids For Growing Cattle Limit-Fed Diets Based On Soybean Hulls, C.A. Löest, B.D. Lambert, A.M. Trater, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

This study evaluated the effects of branched-chain amino acids on nitrogen retention and plasma branched-chain amino acid concentrations. Five ruminally cannulated Holstein steers (387 lb) were used in a 5 x 5 Latin square. Steers were limit-fed soybean hull-based diets twice daily (7.5 lb/day, as fed basis). Energy in the form of acetate (400 grams/day) was continuously infused into the rumen. Treatments were continuous abomasal infusions of 1) 115 grams/day of a mixture of 10 amino acids, 2) 10 amino acid mix with leucine removed, 3) 10 amino acid mix with isoleucine removed, 4) 10 amino acid mix with valine …

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Influence Of Increasing Niacin On Growth Performance And Carcass Characteristics Of Grow-Finish Pigs Reared In A Commercial Environment (2001), D E. Real, E Alonso, Jim L. Nelssen, John A. Unruh, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz Jan 2001

Influence Of Increasing Niacin On Growth Performance And Carcass Characteristics Of Grow-Finish Pigs Reared In A Commercial Environment (2001), D E. Real, E Alonso, Jim L. Nelssen, John A. Unruh, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

There were 1,243 growing pigs used to determine the effects of increasing dietary niacin on growth performance and meat quality of pigs reared in a commercial environment. The dietary treatments consisted of a control diet (no added niacin) or the control diet with 12.5, 25, 50, 100, or 500 g/ton of added niacin. Increasing dietary niacin decreased ADFI and improved F:G for the overall study. Increasing dietary niacin improved carcass shrink, ultimate pH, drip loss percentage, and loin color. Increasing dietary niacin up to 50 ppm improved feed efficiency, but higher concentrations (up to 50 ppm) decreased carcass shrink, and …

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Influence Of Dietary Niacin On Starter Pig Performance (2001), D E. Real, B W. James, E Alonso, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz Jan 2001

Influence Of Dietary Niacin On Starter Pig Performance (2001), D E. Real, B W. James, E Alonso, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted using 415 weanling pigs (175 in Exp. 1, 240 in Exp. 2) to determine the influence of dietary niacin inclusion on starter pig performance. Pigs were fed a control diet with no added niacin or the control diet with 25, 50, 75 or 100 g/ton of added niacin. From d 0 to 8, increasing dietary niacin increased ADG and ADFI up to 50 g/ton of added niacin. Overall, pigs fed increasing levels of niacin tended to have improved ADG. These results suggest feeding 50 g/ton of added dietary niacin to complex nursery pig diets to improve …

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Interactive Effects Of Added L-Carnitine And Chromium Picolinate On Sow Reproductive Performance (2001), D E. Real, K Q. Owen, S Stoller, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Steven S. Dritz Jan 2001

Interactive Effects Of Added L-Carnitine And Chromium Picolinate On Sow Reproductive Performance (2001), D E. Real, K Q. Owen, S Stoller, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 599 sows were used to determine the effects of added L-carnitine and/or chromium picolinate on reproductive performance. Experimental treatments were arranged in a 2 × 2 factorial with main effects of added L-carnitine (0 or 50 ppm) and chromium picolinate (0 or 200 ppb). Starting on the first day of breeding, sows were provided a daily top dress containing the carnitine and(or) chromium along with the standard gestation diet. Dietary treatments were administered daily through the initial gestation, lactation, and through a second gestation period (2 parities). During the first parity, there was a carnitine × chromium …

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Bacterial Degradation Of Milk Components Is Affected By Storage Temperature And Time (2001), S. Zimmerman, I.J. Jeon, L. Mcvay, E. Ferdinand Jan 2001

Bacterial Degradation Of Milk Components Is Affected By Storage Temperature And Time (2001), S. Zimmerman, I.J. Jeon, L. Mcvay, E. Ferdinand

Kansas Agricultural Experiment Station Research Reports

Raw milk is an excellent medium for bacterial growth. The objective of this study was to evaluate the number of microbes and component degradation in raw milk. Milk fat content did not affect bacteria counts. As storage temperature or time increased, greater numbers of bacteria were present. In this study, milk protein was degraded preferentially over lactose or milk fat. As the milk storage temperature increased from 39 to 45°F, protein degradation became more pronounced. Milk fat remained relatively stable, though some degradation products were observed, especially after 4 days of storage at 39°F. Both milk fat and protein degradation …

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Impact Of Dairy Manure Addition On Soil Nutrients In Northeast And South Central Kansas (2001), T. Strahm, Joseph P. Harner, James P. Murphy, G. Mccormack Jan 2001

Impact Of Dairy Manure Addition On Soil Nutrients In Northeast And South Central Kansas (2001), T. Strahm, Joseph P. Harner, James P. Murphy, G. Mccormack

Kansas Agricultural Experiment Station Research Reports

Sixty four percent of the fields (14 of 22) in northeast and south central Kansas would be able to apply dairy manure on a nitrogen basis if the current swine manure application regulations were adopted. Due to high phosphorus levels in some fields, two of the 11 fields in northeast Kansas could not have any manure applied to them. Two other fields in northeast and four fields in south central Kansas would have to limit manure application rates to annual phosphorus required by the crops. Our results indicate minimal accumulation of nitrogen and potassium in the soil profile.; Dairy Day, …

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Evaluation Of Heat Stress In 4- And 6-Row Freestall Buildings Located In Northwest Iowa (2001), John F. Smith, Joseph P. Harner, Michael J. Brouk Jan 2001

Evaluation Of Heat Stress In 4- And 6-Row Freestall Buildings Located In Northwest Iowa (2001), John F. Smith, Joseph P. Harner, Michael J. Brouk

Kansas Agricultural Experiment Station Research Reports

A trial was conducted in the summer of 2000 to evaluate the effect of 4- and 6-row freestall barns located in northwest Iowa on barn temperature, barn humidity, and respiration rates of lactating Holstein cows. Temperature, temperature-humidity index (THI), and respiration rates were greater in 6-row than 4-row freestall barns. Respiration rates were greater in 6-row versus 4-row buildings. The magnitude of difference in the temperature and THI variables may not explain the differences detected in respiration rates. It is possible that a relationship between animal density and social interaction could increase respiration rates when animal density is increased. It …

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Performance Of Holstein Cows Fed Wet Corn Gluten Feed Or Soyhull-Steep Liquor Pellets During Early Lactation (2001), E.E. Ferdinand, Evan C. Titgemeyer, A.F. Park, J.M. Defrain Jan 2001

Performance Of Holstein Cows Fed Wet Corn Gluten Feed Or Soyhull-Steep Liquor Pellets During Early Lactation (2001), E.E. Ferdinand, Evan C. Titgemeyer, A.F. Park, J.M. Defrain

Kansas Agricultural Experiment Station Research Reports

Wet corn gluten feed and soyhull-steep liquor pellets tended to increase dry matter intake and milk yield. Combining condensed corn steep liquor with raw soybean hulls provides a convenient source of digestible fiber and rumen degradable protein.; Dairy Day, 2001, Kansas State University, Manhattan, KS, 2001;

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Evaluation Of Different Copper Sources As A Growth Promoter In Swine Finishing Diets (2001), C W. Hastad, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Steven S. Dritz Jan 2001

Evaluation Of Different Copper Sources As A Growth Promoter In Swine Finishing Diets (2001), C W. Hastad, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two trials were conducted to determine the effects of added copper from copper sulfate or copper chloride on performance of growing-finishing pigs. A total of 2,277 pigs with an initial weight of 71.6 lb were used in a commercial research facility in southwest Minnesota. Adding copper to the diet improved performance during the first two weeks in the finishing barn regardless of copper source or level. The results of these experiments indicate that low levels of copper chloride or copper sulfate (50 to 100 ppm) can be an effective and economical growth promoter when fed for the first two weeks …

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Roundup 2001 Jan 2001

Roundup 2001

Kansas Agricultural Experiment Station Research Reports

Roundup is the major beef cattle education and outreach event sponsored by the Agricultural Research Center-Hays. The purpose is to communicate timely, applicable research information to producers and extension personnel. The research program of the Agricultural Research Center-Hays is dedicated to serving the people of Kansas by developing new knowledge and technology to stabilize and sustain long-term production of food and fiber in a manner consistent with conservation of natural resources, protection of the environment, and assurance of food safety. Primary emphasis is on production efficiency through optimization of inputs in order to increase profit margins for producers in the …

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Impact Of Milk Production And Important Management Factors On The Process Of Dry-Off In Lactating Dairy Cows (2001), R.T. Dingwell, K.E. Leslie, J.M. Sargeant, Y.H. Schukken Jan 2001

Impact Of Milk Production And Important Management Factors On The Process Of Dry-Off In Lactating Dairy Cows (2001), R.T. Dingwell, K.E. Leslie, J.M. Sargeant, Y.H. Schukken

Kansas Agricultural Experiment Station Research Reports

A study of 250 cows located in Canada and the United States revealed the rate of new mammary infections was 9.9% during the dry period. Average milk production on the day prior to dry-off was 13.2 ± 7.2 kg. The odds of a cow developing a new infection was three times greater if the cow was producing more than 5 kg of milk. After 6 weeks of the dry period, 25% of the teats still remained open. This research will serve as the foundation to investigate and implement management strategies prior to dry-off that might improve the overall udder health …

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Presynchronization Of Estrous Cycles In Dairy Cows Before Ovsynch + Cidr And Resynchronization Of Repeat Estrus Using The Cidr, S.Z. El-Zarkouny, J.A. Cartmill, A.M. Richardson, M.A. Medina-Britos Jan 2001

Presynchronization Of Estrous Cycles In Dairy Cows Before Ovsynch + Cidr And Resynchronization Of Repeat Estrus Using The Cidr, S.Z. El-Zarkouny, J.A. Cartmill, A.M. Richardson, M.A. Medina-Britos

Kansas Agricultural Experiment Station Research Reports

Postpartum anestrus is one of the major limitations to achieving acceptable pregnancy rates. The Ovsynch protocol is an excellent tool to improve reproductive efficiency of dairy cows because it can induce estrous cycles in anestrous cows. In the first experiment, administering two PGF2" injections to lactating dairy cows 14 days apart with the second injection given 12 days before the Ovsynch protocol increased (P<0.05) pregnancy rate by 10 percentage points in cycling and noncycling cows. Inserting a progesterone-releasing insert (CIDR) for 7 days during the Ovsynch protocol did not further increase pregnancy rates. In a second experiment, a resynchronization treatment consisting of a used CIDR inserted for 7 days from days 13 to 20 after insemination increased (P<0.05) embryo survival from day 30 to 58 by 11 percentage points but failed to increase overall rate of return to estrus and conception rate at the second AI (first eligible estrus after first AI).; Dairy Day, 2001, Kansas State University, Manhattan, KS, 2001;

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Changes In Rumen Capacity Of Dairy Cows During The Periparturient Period (2001), A.F. Park, J.M. Defrain, Evan C. Titgemeyer, E.E. Ferdinand Jan 2001

Changes In Rumen Capacity Of Dairy Cows During The Periparturient Period (2001), A.F. Park, J.M. Defrain, Evan C. Titgemeyer, E.E. Ferdinand

Kansas Agricultural Experiment Station Research Reports

Four-ruminally fistulated, multiparous, pregnant Holstein cows were studied to characterize ruminal adaptations during the transition from gestation to lactation. Cows were fed typical far-off and close-up diets, a late lactation diet containing wet corn gluten feed (20% DM), and an alfalfa hay, corn silage based early lactation diet. Ruminal measurements were obtained 72 (late lactation), 51 (far-off dry), 23 and 9 (close-up dry) days before expected parturition and 6, 20, and 34 days postpartum. Measurements included total fill, dry matter fill, fluid fill, and water-holding capacity of the rumen. Dry matter intake and milk production data were collected daily and …

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The Influence Of Dietary Energy Level On The Response To Betaine (2001), M G. Young, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2001

The Influence Of Dietary Energy Level On The Response To Betaine (2001), M G. Young, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 800 pigs were used to evaluate the influence of dietary energy level on the response to betaine in finishing pig diets. Dietary treatments were arranged in a 2 × 2 factorial with or without betaine and two energy density levels as the main effects. No betaine × energy interactions (P>0.05) were observed for the entire feeding period (51 to 210 lb) or for any of the three dietary phases. Pigs fed the high energy diets with added fat had (P<.05) greater ADG, lower ADFI, and improved F/G compared with pigs fed the low energy diets without added fat. Adding betaine to the diet had no influence on pig performance.; Swine Day, Manhattan, KS, November 15, 2001

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Escherichia Coli O157:H7 Risk Assessment For Production And Cooking Of Restructured Beef Steaks, M.T. Ortega-Valenzuela, H. Thippareddi, Randall K. Phebus, James L. Marsden, Curtis L. Kastner Jan 2001

Escherichia Coli O157:H7 Risk Assessment For Production And Cooking Of Restructured Beef Steaks, M.T. Ortega-Valenzuela, H. Thippareddi, Randall K. Phebus, James L. Marsden, Curtis L. Kastner

Kansas Agricultural Experiment Station Research Reports

Distribution of Escherichia coli O157:H7 in restructured beef from artificially inoculated meat pieces and destruction of E. coli O157:H7 in restructured beef steaks prepared from artificially inoculated meat was evaluated following broiling and grilling. In Study I, longissimus dorsi trimmings were inoculated with fluorescently marked E. coli O157:H7 cells to microscopically identify bacterial distribution throughout restructured steak cross-sections. E. coli O157:H7 fluorescent density was observed along the glue lines where meat pieces were enzymatically attached. Study II quantified the level of E. coli O157:H7 throughout the entire thickness of restructured beef. Cross-sectional slices of core samples from the steaks showed …

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Carcass Merit Traits: Development Of Epds For Warner-Bratzler Shear Force And Dna Marker Validation, E.J. Pollak, R.J. Lipsey, E.A. Westcott, Michael E. Dikeman, Sally L. Stroda Jan 2001

Carcass Merit Traits: Development Of Epds For Warner-Bratzler Shear Force And Dna Marker Validation, E.J. Pollak, R.J. Lipsey, E.A. Westcott, Michael E. Dikeman, Sally L. Stroda

Kansas Agricultural Experiment Station Research Reports

Warner-Bratzler shear force data on strip loin steaks were obtained on 761 steers from contemporary groups of progeny from the most popular 38 Simmental sires, and 133 steers from nine Simbrah sires. The range for Warner-Bratzler shear force EPDs for the Simmental sires was from -0.51 lb (more tender) to +0.48 lb (less tender). The range in EPDs for the Simbrah sires was from -0.73 to +0.73 lb. In addition, DNA analyses and screening have been completed for 11 quantitative trait loci on several Simmental and Simbrah sires. Information from this project should allow cattle producers to improve carcass traits, …

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Heat Penetration Patterns Of Outside Round, Loin Strip And Eye Round Muscles Cooked By Electric Broiler, Electric Belt Grill, Or Forced-Air Convection Oven, E. Obuz, E.J. Yancey, T.E. Lawrence, D.A. King, Michael E. Dikeman Jan 2001

Heat Penetration Patterns Of Outside Round, Loin Strip And Eye Round Muscles Cooked By Electric Broiler, Electric Belt Grill, Or Forced-Air Convection Oven, E. Obuz, E.J. Yancey, T.E. Lawrence, D.A. King, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

We used an electric belt grill, a forced air convection oven, and an electric broiler to cook steaks from three beef muscles; outside round (biceps femoris), loin strip (longissimus lumborum) and eye round (semitendinosus). Belt grill cookery gave the fastest heat penetration into steaks regardless of temperature interval. Eye round had the slowest heat transfer rate for each cooking method perhaps partially explained by its fiber orientation. Heat penetration rate into outside round and loin strip was not different (P>0.05) for cooking method within a given temperature range. Heat penetration into muscles between 140 and 158°F was slowest because …

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Alfalfa Hay And Wet Corn Gluten Feed Levels In Steam-Flaked Corn Finishing Diets, J.J. Sindt, J.N. Pike, Sean P. Montgomery, C.M. Coetzer, T.B. Farran, T.J. Kessen, R.T. Ethington, James S. Drouillard Jan 2001

Alfalfa Hay And Wet Corn Gluten Feed Levels In Steam-Flaked Corn Finishing Diets, J.J. Sindt, J.N. Pike, Sean P. Montgomery, C.M. Coetzer, T.B. Farran, T.J. Kessen, R.T. Ethington, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

A 153-day finishing experiment was conducted using 631 heifers to determine optimum alfalfa hay and wet corn gluten feed (WCGF) combinations in steam-flaked, corn-based diets. Diets contained either 2 or 6% alfalfa hay and 25, 35, or 45% WCGF (dry basis). Performance was similar (P>0.16) for cattle fed 2 or 6% alfalfa hay. Gain efficiencies (P<0.05) and fat thickness (P<0.10) declined linearly with increasing amounts of WCGF. For heifers fed 2% alfalfa hay, ribeye area increased with increasing dietary WCGF. However for heifers fed 6% alfalfa hay, ribeye area decreased with increasing dietary WCGF. Liver abscesses were lowest for heifers fed 35% WCGF. Alfalfa hay fed at 2% of diet dry matter is sufficient for steam-flaked corn diets containing 25, 35 or 45% WCGF.

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Effects Of Vascular Infusion With A Solution Of Sugars, Sodium Chloride, And Phosphates Plus Vitamins C, E, Or C+E On Display Color, E.J. Yancey, Melvin C. Hunt, P.B. Addis, E. Katsanidis, Michael E. Dikeman Jan 2001

Effects Of Vascular Infusion With A Solution Of Sugars, Sodium Chloride, And Phosphates Plus Vitamins C, E, Or C+E On Display Color, E.J. Yancey, Melvin C. Hunt, P.B. Addis, E. Katsanidis, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Three groups of 12 (n=36) grain-finished, crossbred Charolais steers were humanely slaughtered, and nine in each group were infused via the carotid artery with an aqueous solution of sugars, sodium chloride, and phosphates plus either vitamin C, E, or C plus E. Three in each group served as noninfused controls. Vascular infusion improved redness of longissimus thoracis (ribeye) muscles at 24 hours postmortem, but had little effect on display color stability for steaks. Vascular infusion with the solutions containing vitamin E improved color panel visual evaluations of ground beef at 4 days simulated retail display.

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A Survey Of Phytoestrogenic Activity In Kansas Flint Hills Pastures, S.I. Paisley, W.V. Welshons, G.E. Rottinghaus, Jeffrey L. Davidson, James J. Higgins, Dale A. Blasi, Michael S. Holder, David E. Kehler Jan 2001

A Survey Of Phytoestrogenic Activity In Kansas Flint Hills Pastures, S.I. Paisley, W.V. Welshons, G.E. Rottinghaus, Jeffrey L. Davidson, James J. Higgins, Dale A. Blasi, Michael S. Holder, David E. Kehler

Kansas Agricultural Experiment Station Research Reports

The botanical composition and basal cover of three Kansas Flint Hills pastures located in Butler and Chase counties was surveyed to estimate the incidence of plant species that contain appreciable levels of estrogenic activity. Many-flowered scurfpea and Ladino clover were the only plant species classified as high in estrogenic activity. Although significant estrogenic activity existed in specific species, the willingness of livestock to consume those species is unclear.

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Timed-Insemination Of Beef Heifers Using Cosynch With Or Without Mga, T.A. Wickersham, R.C. Cochran, David M. Grieger Jan 2001

Timed-Insemination Of Beef Heifers Using Cosynch With Or Without Mga, T.A. Wickersham, R.C. Cochran, David M. Grieger

Kansas Agricultural Experiment Station Research Reports

Our purpose was to determine if feeding melengesterol acetate (MGA) for 1 week in combination with gonadotropin-releasing hormone (GnRH) and prostaglandin-F2" (PGF) would better synchronize heifers for timed artificial insemination. Sixty-nine yearling beef heifers received an injection of GnRH 7 days before receiving an injection of PGF. Half of the heifers were fed MGA between the GnRH and PGF injections (Cosynch+MGA), whereas the remaining heifers were not (Cosynch). All heifers were given a second GnRH injection 2 days after PGF and inseminated at that time. Pregnancy rate for the Cosynch group (43%) was greater (P<0.05) than that for the Cosynch+MGA group (15%). This experiment suggests that short-term feeding (7 days) of MGA in concert with a Cosynch protocol was detrimental to fertility in beef heifers.

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Ovulation Synchronization With Progestins Prior To A Cosynch Protocol In Beef Cows, M.A. Medina-Britos, A.M. Richardson, G.C. Lamb, B.A. Hensley, T.J. Marple, Jeffrey S. Stevenson, Sandra K. Johnson Jan 2001

Ovulation Synchronization With Progestins Prior To A Cosynch Protocol In Beef Cows, M.A. Medina-Britos, A.M. Richardson, G.C. Lamb, B.A. Hensley, T.J. Marple, Jeffrey S. Stevenson, Sandra K. Johnson

Kansas Agricultural Experiment Station Research Reports

A multi-location study was conducted using suckled beef cows in Minnesota and Kansas to test the benefit of adding a source of progestin to the Cosynch ovulation synchronization protocol (injections of GnRH, 7 days before and 48 hr after an injection of PGF2", with a fixed-time artificial insemination (AI) administered at the same time as the second GnRH injection). Feeding melengestrol acetate (MGA) for 14 days followed in 12 days by the Cosynch protocol was compared to the Cosynch protocol with the addition of a progesterone-impregnated insert (CIDR) placed in the vagina for 7 days concurrent with the first GnRH …

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Performance Of Beef Heifers Limit-Fed Growing Diets Containing Alfalfa Hay And Wet Corn Gluten Feed, Sean P. Montgomery, J.J. Sindt, T.B. Farran, N.J. Pike, C.M. Coetzer, H.J. Labrune, A.M. Trater, R.D. Hunter, R.A. Stock, James S. Drouillard Jan 2001

Performance Of Beef Heifers Limit-Fed Growing Diets Containing Alfalfa Hay And Wet Corn Gluten Feed, Sean P. Montgomery, J.J. Sindt, T.B. Farran, N.J. Pike, C.M. Coetzer, H.J. Labrune, A.M. Trater, R.D. Hunter, R.A. Stock, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Three hundred thirty-nine crossbred beef heifers were used in a 99-day growing study to identify optimum combinations of alfalfa hay and wet corn gluten feed (WCGF) in limit-fed growing diets. Diets contained 10, 20, or 30% ground alfalfa hay, and 0, 40, or 68% Sweet Bran® WCGF (dry basis) in a 3 x 3 factorial arrangement of treatments. An interaction occurred (P<0.05) between level of alfalfa hay and level of WCGF for both average daily gain and feed efficiency. Increasing the levels of alfalfa hay or WCGF reduced cattle performance, with the exception of the 30% alfalfa hay and 40% WCGF diet, which supported average daily gains similar (P>0.10) to diets containing 20 or 30% alfalfa hay and no WCGF. Feed efficiencies for the 30% alfalfa hay and 40% WCGF diet were better (P<0.05) than the diet containing 30% alfalfa hay and no WCGF. Dry matter intake as measured two hours after feeding increased linearly (P<0.01) with increasing levels of alfalfa hay, and decreased linearly (P<0.01) with increasing levels of WCGF. This study suggests that including WCGF at 40% of the diet (dry basis) can effectively replace steam-flaked corn in limit-fed diets containing 20 or 30% alfalfa hay.

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Effect Of Cooked Molasses Tubs On Performance And Health Of Newly Received Stocker Calves, S.I. Paisley, Gerald L. Stokka, F.K. Brazle Jan 2001

Effect Of Cooked Molasses Tubs On Performance And Health Of Newly Received Stocker Calves, S.I. Paisley, Gerald L. Stokka, F.K. Brazle

Kansas Agricultural Experiment Station Research Reports

Eight paired comparisons conducted at three field sites with 1059 newly-received lightweight stocker calves were used to determine the effect of free-choice cooked molasses tubs designed for receiving cattle on 28-day receiving period performance, percentage of cattle treated for respiratory disease, and death loss. At all sites, cattle received similar management with the exception that cooked molasses tubs were added to half of the pens immediately following initial processing. Weight gains were similar (P=0.36) for cattle with or without access to tubs (43 and 38 lb, respectively). The addition of tubs also did not affect the number of cattle treated …

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Using A Mixture Of Cottonseed Hulls And Cottonseed Meal To Replace Alfalfa Hay In Diets For Stressed Feeder Calves, T.B. Farran, R.D. Hunter, Sean P. Montgomery, J.J. Sindt, Dale A. Blasi, James S. Drouillard Jan 2001

Using A Mixture Of Cottonseed Hulls And Cottonseed Meal To Replace Alfalfa Hay In Diets For Stressed Feeder Calves, T.B. Farran, R.D. Hunter, Sean P. Montgomery, J.J. Sindt, Dale A. Blasi, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

One 28-day receiving experiment was conducted using 625 exotic x British cross heifers to evaluate growth performance and morbidity on receiving diets that contained either alfalfa hay or a pellet composed of 65% cottonseed hulls and 35% cottonseed meal as the roughage source. Heifers fed the cotton byproduct pellet consumed more feed (P<0.01) but tended to be less efficient than those fed alfalfa hay. Daily gain was comparable between diets (P>0.05), and the percentages of heifers diagnosed, treated, or retreated for respiratory disease were similar.

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Addition Of Urea To Finishing Cattle Diets Containing Steam-Flaked Corn And Wet Corn Gluten Feed, Sean P. Montgomery, J.J. Sindt, T.B. Farran, N.J. Pike, C.M. Coetzer, H.J. Labrune, A.M. Trater, R.D. Hunter, R.A. Stock, James S. Drouillard Jan 2001

Addition Of Urea To Finishing Cattle Diets Containing Steam-Flaked Corn And Wet Corn Gluten Feed, Sean P. Montgomery, J.J. Sindt, T.B. Farran, N.J. Pike, C.M. Coetzer, H.J. Labrune, A.M. Trater, R.D. Hunter, R.A. Stock, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Three hundred thirty-nine crossbred beef heifers were used in a 74-day finishing study to evaluate effects of adding 0.5% urea to finishing diets containing steam-flaked corn and 34% (dry basis) Sweet Bran® wet corn gluten feed (WCGF). Diets were fed once daily ad libitum. Urea addition tended (P<0.06) to increase finishing average daily gain, to improve (P<0.12) feed efficiency, and to increase (P<0.06) fat thickness. Heifers fed urea had a lower percentage (P<0.03) of carcasses grading USDA Choice. This study suggests that finishing diets containing a combination of steam-flaked corn and WCGF may benefit from addition of urea as a source of supplemental ruminally available nitrogen.

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