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Kansas Agricultural Experiment Station Research Reports

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2001

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Articles 1 - 30 of 85

Full-Text Articles in Life Sciences

Comparison Of Bioaerosol Sampling Methods For Swine Barns (2001), B Z. Predicala, J E. Urban, S B. Jerez, Ronaldo G. Maghirang, Robert D. Goodband Jan 2001

Comparison Of Bioaerosol Sampling Methods For Swine Barns (2001), B Z. Predicala, J E. Urban, S B. Jerez, Ronaldo G. Maghirang, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

Two bioaerosol sampling methods (Andersen sampler and filtration sampler) were compared. The two samplers were used to assess the bioaerosol loads in two swine finishing barns. They were similar in terms of the species of microorganisms sampled. The persistent strains of microorganisms were various species of the following genera: Staphylococcus, Pseudomonas, Bacillus, Listeria, Enterococcus, Nocardia, Lactobacillus, and Penicillium. However, the use of Andersen sampler resulted in significantly higher bioaerosol concentrations than the filtration sampler. Thus, it appears that filtration sampling can be used for a qualitative survey of bioaerosols in swine barns while the Andersen sampler is suitable for both …

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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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Interactive Effects Between Paylean™ (Ractopamine Hcl) And Dietary Lysine On Pork Quality, Loin, Belly, And Ham Composition (2001), M J. Webster, D E. Real, J C. Woodworth, T A. Marsteller, Robert D. Goodband, Michael D. Tokach, John A. Unruh, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz Jan 2001

Interactive Effects Between Paylean™ (Ractopamine Hcl) And Dietary Lysine On Pork Quality, Loin, Belly, And Ham Composition (2001), M J. Webster, D E. Real, J C. Woodworth, T A. Marsteller, Robert D. Goodband, Michael D. Tokach, John A. Unruh, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 432 pigs were used to evaluate the effects of Paylean and dietary lysine on pork quality and loin, belly, and ham composition. The 12 dietary treatments included Paylean (0, 4.5, and 9.0 g/ton) and 4 levels of lysine. For pigs fed no Paylean, lysine levels were 0.60, 0.80, 1.00, and 1.20%. For pigs fed 4.5 or 9.0 g/ton of Paylean, lysine levels were 0.80, 1.00, 1.20, and 1.40%. The results indicate that pigs fed Paylean and increasing levels of lysine will have less loin marbling and belly firmness compared to control pigs fed lower levels of lysine.; …

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Interactive Effects Of Carnitine Status, Dietary Carnitine, And Added Fat On Growth Performance Of Weanling Pigs (2001), J C. Woodworth, K Q. Owen, J Lopez, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, Steven S. Dritz Jan 2001

Interactive Effects Of Carnitine Status, Dietary Carnitine, And Added Fat On Growth Performance Of Weanling Pigs (2001), J C. Woodworth, K Q. Owen, J Lopez, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to determine the interactive effects of carnitine status (with or without carnitine in diets fed to sows in gestation and lactation), and added fat and dietary carnitine in nursery diets on growth performance of weanling pigs. Feeding sows diets containing carnitine in gestation and lactation had no effect on growth performance of their pigs through 27-d after weaning. A carnitine by fat interaction (P<0.05) was observed for ADFI from d 0 to 7 and ADG from d 0 to 27 in Exp. 1 with pigs fed carnitine and no added fat appearing to have the best performance. In exp. 2, added carnitine had little effect on growth performance, whereas added fat improved feed efficiency. In conclusion, no benefit to growth performance was observed from adding both carnitine and fat to the diet of weanling pigs in these experiments.; Swine Day, Manhattan, KS, November 15, 2001

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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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The Optimal Ratio Of Apparent Digestible Valine To Lysine To Maximize Growth Performance Of The Nursery Pig (2001), B W. James, J C. Woodworth, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz Jan 2001

The Optimal Ratio Of Apparent Digestible Valine To Lysine To Maximize Growth Performance Of The Nursery Pig (2001), B W. James, J C. Woodworth, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 210 nursery pigs (initially 19.6 lb and approximately 28 d of age) were used in a 21-d growth assay to determine the optimal ratio of valine to lysine to maximize growth performance. The seven treatments consisted of a basal diet (14.2% CP; 1.07% apparent digestible lysine) with increasing ratios of valine:lysine (48, 53, 58, 63, 69, and 74%) and a negative control containing 0.97% lysine and 0.79% apparent digestible valine. Results indicate that the optimal apparent digestible valine:lysine ratio for the nursery pig is 58 and 64% for ADG and F/G, respectively. Therefore, most typical nursery diets …

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Comparison Of Edible Grade Whey, Granular Whey, And Dairylac 80 As Lactose Sources For Nursery Pig Diets (2001), J C. Woodworth, B W. James, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz Jan 2001

Comparison Of Edible Grade Whey, Granular Whey, And Dairylac 80 As Lactose Sources For Nursery Pig Diets (2001), J C. Woodworth, B W. James, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two hundred ten weanling pigs (initially 12.4 lb and 18 ± 2 d of age) were used in a 14-d growth assay to determine the influence of various lactose sources and levels on nursery pig performance. From d 0 to 14, the mean ADG and ADFI of pigs fed additional lactose, regardless of source, was greater and tended to be greater compared to those fed no supplemental lactose. Pigs fed edible grade whey had increased ADFI and tended to have increased ADG as lactose increased from 9 to 18%. When Dairylac 80 or granular whey was included in the diet, …

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Effects Of Soybean Meal Particle Size On Growth Performance Of Nursery Pigs (2001), K R. Lawrence, C W. Hastad, M J. Webster, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen, Steven S. Dritz Jan 2001

Effects Of Soybean Meal Particle Size On Growth Performance Of Nursery Pigs (2001), K R. Lawrence, C W. Hastad, M J. Webster, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 360 pigs were used in two experiments to determine the effects of decreasing particle size of soybean meal on nursery pig performance. In Exp. 1, pigs were fed diets containing 34% extrudedexpelled soybean meal ground to 965, 742, or 639 microns. In Exp. 2, pigs were fed the same diet containing solvent extracted soybean meal ground to 1226, 797, or 444 microns. Decreasing soybean meal particle size did not influence pig growth performance in either study.; Swine Day, Manhattan, KS, November 15, 2001

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Comparison Of International Protein Corporation 740 Fish Meal And Special Select™ Menhaden Fish Meal In Nursery Pig Diets (2001), M G. Young, M Cici, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2001

Comparison Of International Protein Corporation 740 Fish Meal And Special Select™ Menhaden Fish Meal In Nursery Pig Diets (2001), M G. Young, M Cici, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

One hundred and seventy five pigs (initially weighing 14.1 lb and 17 + 2 d of age) were used in a 21-d growth assay to compare performance of pigs fed two sources of Menhaden fish meal. Overall, there was no difference in growth performance between the two fish meal sources. For the first 14 days ADG and F/G were improved by including fish meal in the diet and as the level increased from 2.5 to 5%. However, in the third week (day 14 to 21) of the trial there was no benefit in adding fish meal to the diet. These …

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Effects Of Ingredient And Whole Diet Irradiation On Nursery Pig Performance (2001), J C. Woodworth, M J. Webster, B W. James, D E. Real, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz Jan 2001

Effects Of Ingredient And Whole Diet Irradiation On Nursery Pig Performance (2001), J C. Woodworth, M J. Webster, B W. James, D E. Real, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two trials were conducted to determine the effects of irradiation of individual ingredients or the whole diet on growth performance in nursery pigs. The response was similar for both trials with pigs fed diets containing irradiated spray-dried animal plasma or soybean meal having increased (P<0.05) ADG compared with pigs fed the control diet with no irradiated ingredients or the complete diet that was irradiated. Also, ADFI (P<0.05) was higher for pigs consuming the diet with irradiated soybean meal compared with those fed the irradiated whole diet. Pigs fed irradiated spray-dried animal plasma also had superior F/G (P<0.05) compared with those fed diets containing irradiated microingredients or if all ingredients had been irradiated before manufacturing. Therefore, irradiation of certain feed ingredients can improve growth performance in nursery, whereas irradiation of all ingredients in the diet or the whole diet does not enhance performance.; Swine Day, Manhattan, KS, November 15, 2001

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Evaluation Of Irradiation And Termin-8® Addition To Spray-Dried Animal Plasma, Base Mix And/Or Whole Diet On Growth Performance Of Nursery Pigs (2001), R E. Musser, W N. Cannon, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz Jan 2001

Evaluation Of Irradiation And Termin-8® Addition To Spray-Dried Animal Plasma, Base Mix And/Or Whole Diet On Growth Performance Of Nursery Pigs (2001), R E. Musser, W N. Cannon, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two studies were conducted to evaluate the effects of irradiation of spray-dried animal plasma and Termin-8 treatment to spray-dried animal plasma, base mix (specialty protein products, milk products, ground oat groats, soy flour, flow agent, vitamins, and minerals), or whole diet on nursery pig performance. Overall (d 0 to 14) in Exp. 1, pigs fed diets containing irradiated plasma had increased ADG and pigs fed Termin-8® treated plasma had increased ADG and ADFI compared to pigs fed diets with regular plasma or whole diets (containing either regular or irradiated plasma) treated with Termin-8. No differences in F/G were observed among …

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Comparison Of Irradiated Feed And Food Grade Spray-Dried Animal Plasma On Nursery Pig Performance (2001), J C. Woodworth, C W. Hastad, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz Jan 2001

Comparison Of Irradiated Feed And Food Grade Spray-Dried Animal Plasma On Nursery Pig Performance (2001), J C. Woodworth, C W. Hastad, Joel M. Derouchey, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to determine the effects of initial bacterial concentrations in animal plasma on growth performance of weanling pigs. In Exp. 1 during the experimental period (d 0 to 14), pigs fed plasma had increased ADG and ADFI compared to pigs fed the control diet. Pigs fed the irradiated AP 920, as well as source 1 and source 2 regular (nonirradiated) food grade plasma had increased ADG compared to the control diet. Furthermore, pigs fed irradiated AP 920, regular AP 820, regular and irradiated source 1 food grade and regular source 2 food grade animal plasma had improved …

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The Relationship Between Body Condition Score And Backfat In Gestating Sows (2001), M G. Young, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2001

The Relationship Between Body Condition Score And Backfat In Gestating Sows (2001), M G. Young, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Backfat and body condition score were measured on 731 sows in a commercial swine facility to assess the accuracy of feeding sows in gestation based on body condition score. Body condition score was poorly correlated (r2 = 0.19) with backfat thickness. For example, sows assessed with a body condition of 3 ranged in backfat from 0.3 to 0.9 in. (7.5 to 23 mm). This illustrates the need to find a more objective method of measuring body condition (such as ultrasound) in order to properly adjust feeding levels and thus reduce variation in backfat of sows.; Swine Day, Manhattan, KS, November …

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Field Research 2001, Dale L. Fjell Jan 2001

Field Research 2001, Dale L. Fjell

Kansas Agricultural Experiment Station Research Reports

No abstract provided.

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Carcass Merit Project: Development Of Epds And Genetic Marker Validation (2001), E.J. Pollak, R.D. Green, J. Taylor, S. Davis, T. Holm, S. Koontz, C. Gill, Daniel W. Moser, E.A. Westcott, Michael E. Dikeman Jan 2001

Carcass Merit Project: Development Of Epds And Genetic Marker Validation (2001), E.J. Pollak, R.D. Green, J. Taylor, S. Davis, T. Holm, S. Koontz, C. Gill, Daniel W. Moser, E.A. Westcott, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Carcass and Warner-Bratzler shear force data on strip loin steaks have been obtained on over 4,200 cattle from contemporary progeny groups from the most widely used sires in 15 beef cattle breed associations (16 breeds). Trained sensory panel evaluations have been conducted on over 1,500 strip loin steaks from a sample of contemporary progeny groups from sires included in the QTL (quantitative trait loci) validation component of the project. One breed association has published Warner-Bratzler shear force Expected Progeny Differences (EPDs) for 57 sires of two breeds. DNA analyses and screening have been completed for 11 QTL on eight sires …

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Alfalfa Hay And Wet Corn Gluten Feed Levels In Steam-Flaked Corn Finishing Diets (2001), 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 (2001), 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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Improving Color Stability Of Beef Top Round (2001), L.M. Sammel, Melvin C. Hunt, Donald H. Kropf Jan 2001

Improving Color Stability Of Beef Top Round (2001), L.M. Sammel, Melvin C. Hunt, Donald H. Kropf

Kansas Agricultural Experiment Station Research Reports

The beef inside round muscle, especially the deep portion, has poor color stability, a troublesome condition for the meat industry. We examined influences of pre-rigor temperature and pH decline on chemistry of the inside (deep) semimembranosus (ISM) and outside (surface) semimembranosus (OSM) in relation to initial color and stability. Cold-boned ISM had a slower chill rate; faster pH decline; more denatured protein; less metmyoglobin reducing ability, oxygen consumption, and water holding capacity; and a lighter, less stable color than the OSM. Cold-boned steaks were two-toned in color and discolored by day 3 of display. Hotboned ISM and OSM chilled at …

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Rumensin®-Tylan® Combinations In Limit-Fed Growing Diets: Effects On Growing And Finishing Performance And Carcass Characteristics (2001), Sean P. Montgomery, T.B. Farran, J.J. Sindt, C.M. Coetzer, J.N. Pike, A.M. Trater, H.J. Labrune, R.D. Hunter, S.B. Laudert, James S. Drouillard Jan 2001

Rumensin®-Tylan® Combinations In Limit-Fed Growing Diets: Effects On Growing And Finishing Performance And Carcass Characteristics (2001), Sean P. Montgomery, T.B. Farran, J.J. Sindt, C.M. Coetzer, J.N. Pike, A.M. Trater, H.J. Labrune, R.D. Hunter, S.B. Laudert, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Five hundred seventy-two crossbred beef heifers were used to compare gain and feed efficiency of cattle consuming restricted quantities of energy-dense growing diets containing varying concentrations of Rumensin® and Tylan®. Growing treatments consisted of providing Rumensin at 30 grams per ton of dry matter (R30), or 250 mg per head per day (R250). A third treatment consisted of a Rumensin/Tylan combination, providing 250 and 90 mg per head per day of Rumensin and Tylan, respectively (R250/T90). Average daily gain and feed efficiency during the growing phase were not different (P>0.90) among treatments. Heifers that received R250/T90 during the growing …

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Soybean Hulls And Alfalfa For Limit-Fed Cattle (2001), A.M. Trater, C.A. Löest, B.D. Lambert, Evan C. Titgemeyer Jan 2001

Soybean Hulls And Alfalfa For Limit-Fed Cattle (2001), A.M. Trater, C.A. Löest, B.D. Lambert, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

We evaluated the optimal level of alfalfa inclusion in limit-fed, soybean hull-based diets. Steers were fed soybean hull-based diets containing 0 to 30% alfalfa or alfalfa alone. Feed intakes were lower for alfalfa than for soybean hull-based diets. Digestibilities of dry matter and neutral detergent fiber were lower (P<0.05) for alfalfa than for diets containing soybean hulls. Dry matter and neutral detergent fiber digestibilities were similar for different levels of alfalfa in diets containing soybean hulls, although there were positive associative effects between soybean hulls and alfalfa. Rates of liquid passage from the rumen were higher for alfalfa than for soybean hull-containing diets, and increased as alfalfa was added to the soybean hull diets. Solid passage rates also increased with increasing amounts of alfalfa in soybean hull-containing diets. Adding 30% alfalfa to primarily soybean hull diets led to positive associative effects on diet digestibility, but alfalfa additions increased liquid and solid passage rates, suggesting that the benefit was not a result of slower passage of soybean hulls from the rumen.

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Effects Of Wet Corn Gluten Feed And Intake Level On Diet Digestibility And Rumen Passage Rate In Steers (2001), Sean P. Montgomery, J.J. Sindt, T.B. Farran, N.J. Pike, C.M. Coetzer, A.M. Trater, James J. Higgins, James S. Drouillard, Evan C. Titgemeyer Jan 2001

Effects Of Wet Corn Gluten Feed And Intake Level On Diet Digestibility And Rumen Passage Rate In Steers (2001), Sean P. Montgomery, J.J. Sindt, T.B. Farran, N.J. Pike, C.M. Coetzer, A.M. Trater, James J. Higgins, James S. Drouillard, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

Including 40% wet corn gluten feed (WCGF) in the diet increased total tract digestion of organic matter and neutral detergent fiber (P<0.01), reduced total volatile fatty acid concentration (P<0.01), increased rumen NH3 concentration (P<0.01), increased rumen pH, and tended (P<0.06) to increase total tract digestion of starch. Furthermore, WCGF increased rumen passage rate of solid digesta (P<0.01) compared to diets containing no WCGF. Limit feeding reduced total tract digestion of organic matter and neutral detergent fiber (P<0.01), decreased total volatile fatty acid concentration (P<0.01), increased rumen NH3 concentration (P<.01), increased rumen pH at 0 and 12 hours after feeding, reduced rumen pH at 4 hours after feeding, and increased rumen liquid passage rate (P<0.02).

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Interrelationships Among Carcass Characteristics Of Feedlot Steers And Heifers Selected For Competition (2001), D.A. King, T.E. Lawrence, D.E. Schafer, Michael E. Dikeman Jan 2001

Interrelationships Among Carcass Characteristics Of Feedlot Steers And Heifers Selected For Competition (2001), D.A. King, T.E. Lawrence, D.E. Schafer, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

We evaluated the interrelationships among carcass characteristics of steers and heifers selected from commercial feedlots for competition in the Beef Empire Days live and carcass contests. Because judging criteria are weighted heavily on cutability, the majority of cattle entered were trim and muscular. Within this highly selected group, heifer carcasses had larger ribeye areas, lower hot carcass weights, more ribeye area/100 lbs. of hot carcass weight, and a higher percentage of kidney-pelvic-heart fat than steers. However, steers graded USDA Choice or better 4% more often than heifers. Ribeye area, ribeye area/100 lbs. of hot carcass weight, and percentage of kidneypelvic- …

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A Survey Of Phytoestrogenic Activity In Kansas Flint Hills Pastures (2001), 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 (2001), 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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Motivation Factors For Beef Processor-Producer Linkages (2001), J.D. Lawrence, M.L. Hayenga, Ted C. Schroeder Jan 2001

Motivation Factors For Beef Processor-Producer Linkages (2001), 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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Evaluation Of Southwestern Kansas Native Grasses (2001), T.T. Marston, D.O. Yauk Jan 2001

Evaluation Of Southwestern Kansas Native Grasses (2001), T.T. Marston, D.O. Yauk

Kansas Agricultural Experiment Station Research Reports

Native grass samples were collected monthly for five years and analyzed for nutrient content. Crude protein and ADF content indicate that grass quality is highest in May and June, then steadily declines until October. Stocker operators may need to begin protein supplementation as early as July to sustain weight gains. Trace mineral values were erratic from year to year and month to month between and within years, indicating that trace mineral supplementation should probably be maintained throughout the grazing season.

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

Timed-Insemination Of Beef Heifers Using Cosynch With Or Without Mga (2001), 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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Effects Of Vaccinating Beef Dams Precalving And Calves Preweaning With A Pasteurella Haemolytica Vaccine (2001), L.E. Wankel, T.T. Marston, Gerald L. Stokka, J.R. Brethour, Timothy G. Rozell Jan 2001

Effects Of Vaccinating Beef Dams Precalving And Calves Preweaning With A Pasteurella Haemolytica Vaccine (2001), L.E. Wankel, T.T. Marston, Gerald L. Stokka, J.R. Brethour, Timothy G. Rozell

Kansas Agricultural Experiment Station Research Reports

Our objective was to determine if vaccinating dams precalving and calves preweaning for Pasteurella haemolytica could effect serum antibody titers in dams, and the pre- and post-weaning health and performance of their calves. Vaccination increased serum antibody titers in multiparous cows, but not first-calf heifers. Precalving vaccination had minimal effects on mortality and morbidity of calves before or after weaning. Subsequent steer feedlot gains were unaffected by precalving and preweaning vaccinations and carcasses were not affected. However, heifers' weight gains were greater from weaning to one year of age when reared by vaccinated dams.

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Ovulation Synchronization With Progestins Prior To A Cosynch Protocol In Beef Cows (2001), 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 (2001), 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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Evaluation Of Ralgro® On Pasture And Subsequent Feedlot Performance And Carcass Merit Of Mexican Crossbred Steers (2001), S.I. Paisley, Gerry L. Kuhl, James J. Higgins, G.L. Huck, T.B. Farran, J.J. Sindt, Sean P. Montgomery, C. Birkelo, Dale A. Blasi, Michael E. Dikeman Jan 2001

Evaluation Of Ralgro® On Pasture And Subsequent Feedlot Performance And Carcass Merit Of Mexican Crossbred Steers (2001), S.I. Paisley, Gerry L. Kuhl, James J. Higgins, G.L. Huck, T.B. Farran, J.J. Sindt, Sean P. Montgomery, C. Birkelo, Dale A. Blasi, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

A pasture/feedlot field study was conducted to evaluate the effects of a single Ralgro® implant during the stocker phase on steer grazing performance and subsequent feedlot performance and carcass merit. A total of 2,764 steers of Mexican origin averaging 449 lb were assembled in Texas and shipped to Kansas, where they grazed on three intensively-early-stocked Flint Hills pastures. At initial processing, the steers were individually weighed and randomly assigned to either a non-implanted control group or a Ralgro implant group. Ralgro steers gained more (23 lb; P<0.01) than controls during the 82- to 93-day grazing phase. Following the grazing phase, all steers were shipped to a commercial feedlot in southwestern Kansas where steers from each pasture were individually weighed and given a single Component E-S® implant. Immediately after processing, steers from each pasture were sorted into either a light- or heavy-weight pen, regardless of pasture implant treatment, resulting in six feedlot pens. Days on feed ranged from 127 to 197. Control steers gained faster (P<0.01) during the feedlot phase; however, Ralgro steers had higher cumulative weight gains across the combined pasture and feedlot phases (P<0.01) and averaged three fewer days on feed (P<0.05). There were no significant differences for marbling, fat thickness, ribeye area, KPH fat, or yield grade. Ralgro steers had lower (P<0.05) quality grades because of a higher incidence (P<0.001) of steers with B and C carcass maturities.

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Response Of Holstein Steers Fed A Soybean Hull-Based Diet To Amino Acid Supplementation When The Methionine Requirement Was Met (2001), 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 (2001), 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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Effect Of Cooked Molasses Tubs On Performance And Health Of Newly Received Stocker Calves (2001), 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 (2001), 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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