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Kansas Agricultural Experiment Station Research Reports

1990

Other Animal Sciences

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Articles 1 - 30 of 69

Full-Text Articles in Life Sciences

Comparison Of Two Atrophic Rhinitis Vaccines For Young Pigs (1990), D A. Schoneweis, Robert H. Hines Jan 1990

Comparison Of Two Atrophic Rhinitis Vaccines For Young Pigs (1990), D A. Schoneweis, Robert H. Hines

Kansas Agricultural Experiment Station Research Reports

Two farrowing groups (340 pigs) were used to evaluate two atrophic rhinitis vaccines (Atrobac III and Tocivac for the young pig. Both vaccines were effective, because no clinical evidence of atrophic rhinitis was observed for either treatment during the experiment. Although the swine herd had been observed in previous farrowing do have various degrees of conjunctivitis, none was observed in the pigs vaccinated with either vaccine. Weight gains of pigs at 14 d and 35 d postweaning were the same for each treatment.; Swine Day, Manhattan, KS, November 15, 1990

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Feed Mills For On-Farm Feed Manufacturing (1990), James P. Murphy, Joseph P. Harner Jan 1990

Feed Mills For On-Farm Feed Manufacturing (1990), James P. Murphy, Joseph P. Harner

Kansas Agricultural Experiment Station Research Reports

Quality feed can be manufactured on farm using hammer or roller mills for particle size reduction and volumetric or weighing devices for proportioning ingredients. An understanding of each of the seven steps involved will enhance the ability to manufacture a quality feed for maximum feed efficiency at a feasible price.; Swine Day, Manhattan, KS, November 15, 1990

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The Effects Of Dietary Threonine And Porcine Somatotropin Dosage On Nitrogen Balance In Finishing Swine (1990), J A. Swanson, B R. Schricker, D F. Li, J A. Hansen, Robert D. Goodband, Jim L. Nelssen Jan 1990

The Effects Of Dietary Threonine And Porcine Somatotropin Dosage On Nitrogen Balance In Finishing Swine (1990), J A. Swanson, B R. Schricker, D F. Li, J A. Hansen, Robert D. Goodband, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

Fifteen crossbred barrows were utilized to determine the effects of porcine somatotropin (pST) administration in combination with increasing dietary threonine levels on nitrogen retention and growth performance. Barrows averaging 147.3 lb were allotted in a split-plot arrangement with pST dosage (0, 4, or 8 mg/d) as the whole plot, and dietary threonine level (.45, .55, .65, .75, and .85%) as the subplot. These threonine values ranged from 112 to 212% of the dietary threonine estimate for finishing pigs (NRC 1988). All pigs within each pST dosage treatment received each diet for an 8-d period in a Latin square design. Diets …

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Effects Of Daily Administration Of Porcine Somatotropin On Performance Of Growing Pigs (55 To 130 Lb) (1990), G E. Fitzner, T L. Weeden, B J. Healy, B R. Schricker, Robert H. Hines, Jim L. Nelssen, Robert D. Goodband, Donald H. Kropf, Joe D. Hancock Jan 1990

Effects Of Daily Administration Of Porcine Somatotropin On Performance Of Growing Pigs (55 To 130 Lb) (1990), G E. Fitzner, T L. Weeden, B J. Healy, B R. Schricker, Robert H. Hines, Jim L. Nelssen, Robert D. Goodband, Donald H. Kropf, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

Sixty crossbred barrows initially weighing 55.7 lb were used to evaluate six experimental treatments during a 5-wk growth trial. Pigs received one of three levels of dietary lysine (1.0, 1.5, or 2.0%) and were injected daily with either 3 mg porcine somatotropin (pST) or placebo. During the first 2 wk of the trial, there was no effect from either pST injection or increasing level of dietary lysine on average daily gain (ADG) or average daily feed intake (ADFI). Also, there was no effect of pST injections on feed conversion (F/G), but those pigs fed diets containing higher levels of lysine …

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Effect Of Extrusion On The Nutritional Value Of Soybeans And Sorghum Grain In Finishing Pigs (1990), G E. Fitzner, T L. Weeden, Terry L. Gugle, Robert H. Hines, Joe D. Hancock Jan 1990

Effect Of Extrusion On The Nutritional Value Of Soybeans And Sorghum Grain In Finishing Pigs (1990), G E. Fitzner, T L. Weeden, Terry L. Gugle, Robert H. Hines, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

A total of 112 finishing pigs (avg initial wt of 139 lb) was used to determine the effects of adding extruded soybeans and/or sorghum grain to diets for finishing pigs. Treatments were: 1) sorghum-soybean meal control (sorghum-SBM), 2) extruded soybeans and ground sorghum, 3) SBM and extruded sorghum, and 4) extruded soybeans and sorghum. All diets were isocaloric and isolysinic. Using extruded soybeans and/or sorghum improved efficiency of gain compared to the sorghum-SBM control. This response was apparently related to the improved digestibilities of dry matter and nitrogen with the use of extruded ingredients. Optimum digestibility of dry matter and …

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Low Test-Weight Sorghum For Growing-Finishing Swine (1990), J A. Hansen, R C. Thaler, Robert D. Goodband, Jim L. Nelssen, Robert H. Hines, Joe D. Hancock Jan 1990

Low Test-Weight Sorghum For Growing-Finishing Swine (1990), J A. Hansen, R C. Thaler, Robert D. Goodband, Jim L. Nelssen, Robert H. Hines, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

Two growth studies were conducted to determine the effects of substituting lower test-weight sorghum (35 lb/bu as LOW or 45 lb/bu as MED) for normal test-weight sorghum (55 lb/bu NORM), in growing and finishing swine diets. One-hundred twelve pigs (50 lb initial wt) were fed for 28 d in the grower study and 80 pigs (120 lb initial wt) were fed for 51 d in the finisher study. Diets were formulated to contain .80 and .65% lysine for the grower and finisher trials, respectively, using NORM and soybean meal; LOW and MED were substituted on a wt/wt basis for NORM. …

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Interrelationship Between Hypersensitivity To Soybean Proteins And Growth Performance In Early-Weaned Pigs (1990), D F. Li, P G. Reddy, Frank Blecha, R Klemm, Jim L. Nelssen, Robert D. Goodband Jan 1990

Interrelationship Between Hypersensitivity To Soybean Proteins And Growth Performance In Early-Weaned Pigs (1990), D F. Li, P G. Reddy, Frank Blecha, R Klemm, Jim L. Nelssen, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

One hundred twenty-five pigs were orally infused with 6 g/d of either dried skim milk, soybean meal (48% CP), soy protein concentrate, extruded soy protein concentrate, or experimental soy protein concentrate from 7 to 11 d of age and then fed a diet containing the corresponding protein sources from weaning (d 21) to 35 d of age. All pigs were fed a corn-soybean meal diet containing 10% dried whey, 1.25% lysine, and 3% soybean oil for the remaining 21 d of the experiment. Skin-fold thickness following intradermal injection of protein extracts, xylose absorption, and anti-soy immunoglobulin G (IgG) titers were …

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Effect Of Substituting Spray-Dried Plasma Protein For Milk Products In Starter Pig Diets (1990), J A. Hansen, K G. Friesen, T L. Weeden, Robert D. Goodband, Jim L. Nelssen Jan 1990

Effect Of Substituting Spray-Dried Plasma Protein For Milk Products In Starter Pig Diets (1990), J A. Hansen, K G. Friesen, T L. Weeden, Robert D. Goodband, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

Two growth trials utilizing 444 weaned pigs were conducted to determine the efficacy of substituting spray-dried porcine plasma protein (PP) for dried skim milk (DSM) and/or dried whey (DW) in starter pig diets. Trial 1 was a field study in which 240 pigs were fed either a control diet containing 20% DSM and 20% DW during phase I (0 to 14 d postweaning) and 15% DW and 5% select menhaden fishmeal in phase II (14 to 28 d postweaning) of the 28 d trial. Plasma protein was substituted on a lysine basis for DSM in the phase I diet and …

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Improving On-Farm Mixing Efficiency (1990), Robert D. Goodband Jan 1990

Improving On-Farm Mixing Efficiency (1990), Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

Particle size reduction has a great impact on efficiency of feed utilization. Decreasing particle size improves digestibility of nutrients by increasing surface area and allowing for greater interaction with digestive enzymes. In addition, particle size reduction can influence how uniformly feed is mixed and potential for segregation of ingredients. Mixing equipment and times also need to be evaluated to ensure feed uniformity. Very often suggested mixing times underestimate the amount of time necessary to thoroughly mix feed. Items such as worn paddles or ribbons, ribbon or paddle speed, and overfilling mixers increase the time necessary for adequate feed mixing and …

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Computerized Records: Use In Troubleshooting Reproductive Problems Of Commercial Swine Herds (1990), Gary Dial Jan 1990

Computerized Records: Use In Troubleshooting Reproductive Problems Of Commercial Swine Herds (1990), Gary Dial

Kansas Agricultural Experiment Station Research Reports

Swine production has become, in a relatively short time, one of the most competitive agribusinesses. The increase in international exportation of pork, dynamic changes in the efficiency of hog production, and the increasing preference of consumers for alternative meats has mandated that the swine industry be competitive with other producers of protein foodstuffs. Recent changes in the American swine industry have been dynamic. During the past 10 years, the financial advantage of volume selling and buying has led to an unwavering, irreversible evolution toward increasingly larger herd sizes. Accompanying this has been an ongoing trend toward decentralization away from the …

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Influence Of Fat And Ionophores On Performance Of Finishing Steers, E.M. Clary, Robert T. Brandt Jr., Ronald V. Pope Jan 1990

Influence Of Fat And Ionophores On Performance Of Finishing Steers, E.M. Clary, Robert T. Brandt Jr., Ronald V. Pope

Kansas Agricultural Experiment Station Research Reports

One hundred ninety-two crossbred steers were used in a 2 x 4 factorially arranged experiment to study the effects of including fat and ionophores in finishing rations. Main effects were level of supplemental fat (0 or 4% tallow) and ionophore type [none, Bovatece (B), Rumensine + 'JYlane (RT), or daily rotation of Band RT (BRT)]. Daily feed intake (P<.10) and daily gain (P<.OO5) were reduced for steers fed R'T, but only when fat was included in the diet. In diets containing no supplemental fat, RT increased daily gain 10%. RT improved feed efficiency 8% (P<.05) in nonfat diets, but there was no difference between ionophores in diets containing fat. Adding fat improved feed efficiency of steers fed no ionophore or B. This study suggests that response of finishing steers to ionophores can be modified by the inclusion of fat in the diet.

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Value Of Ralgro® Implants In Feedlot Steers Previously Maintained On A High Endophyte-Infected Fescue Hay, L.R. Corah, F.K. Brazle, Frank Blecha, P.G. Reddy, R.E. Jr. Wary, J. Klindt Jan 1990

Value Of Ralgro® Implants In Feedlot Steers Previously Maintained On A High Endophyte-Infected Fescue Hay, L.R. Corah, F.K. Brazle, Frank Blecha, P.G. Reddy, R.E. Jr. Wary, J. Klindt

Kansas Agricultural Experiment Station Research Reports

Steers previously fed high-endophyte fescue hay showed a greater response of Ralgro® implants than those fed a low-endophyte hay. The mode of action for this response was not explained by cellular immune system responses or variability in prolactin levels.

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Performance Of Steers Limit-Fed In Drylot Or On Mature Native Pasture, F.K. Brazle, Gerry L. Kuhl Jan 1990

Performance Of Steers Limit-Fed In Drylot Or On Mature Native Pasture, F.K. Brazle, Gerry L. Kuhl

Kansas Agricultural Experiment Station Research Reports

Growing steers were limit-fed the same amount of a grain- and silage-based ration either in drylot or on dormant native range. The steers wintered on pasture gained 14.2% slower (1.82 V5 2.08 lb/d; P<.01) and were 15.3% less efficient than those in drylot, apparently because of increased energy expenditure from voluntary exercise.

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Effects Of Finaplix® Synovex-S®, And Ralgro® Implants, Singularly Or In Combinations, On Performance, Carcass Traits, And Longissimus Palatability Of Holstein Steers, J.K. Apple, D.D. Simms, Gerry L. Kuhl, Michael E. Dikeman, Curtis L. Kastner Jan 1990

Effects Of Finaplix® Synovex-S®, And Ralgro® Implants, Singularly Or In Combinations, On Performance, Carcass Traits, And Longissimus Palatability Of Holstein Steers, J.K. Apple, D.D. Simms, Gerry L. Kuhl, Michael E. Dikeman, Curtis L. Kastner

Kansas Agricultural Experiment Station Research Reports

Over the entire feeding period (249 d). Finaplix® (F) plus Synovex-S® (S)-implanted steers had higher (P<.05) daily gains than F+Ralgro® (R), F; and control (C) steers. All treatments produced higher (P<.05) daily gains than C. with the exception of F: The only feed efficiency differences were during the fourth implant period. when F steers were more (P<.05) efficient than F+R or C steers. The F+S and F+R steers had higher (P<.05) masculinity scores than Sand C steers. Carcasses of F +S steers were heavier (P<.05) than those of F and C steers. The F+S steers had larger (P<.05) ribeyes than R, F; and C steers. Also, F+S steers tended (P=.07) to have lower yield grades than S, R. or C steers. Even though marbling scores and quality grades were similar (P>.05) among treatments. only 50% of F+S carcasses graded low Choice or higher compared to a range of 75 to 100% for the other treatments. The only meat palatability differences were tenderness scores; steaks from Sand F + R steers were less tender (P<.07) than those from Rand C steers.

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Effect Of Inoculant And Enzyme Additives On Preservation And Nutritive Value Of Alfalfa Silage, J.S. White, K.K. Bolsen, R.A. Hart Jan 1990

Effect Of Inoculant And Enzyme Additives On Preservation And Nutritive Value Of Alfalfa Silage, J.S. White, K.K. Bolsen, R.A. Hart

Kansas Agricultural Experiment Station Research Reports

Lactic acid bacteria (LAB) inoculants and several enzyme additives were evaluated in various combinations using fifth cutting alfalfa. The field-wilted crop was characterized by a high buffer capacity (63.0 meq/100g of DM), low fermentable carbohydrate (5.4% of the DM), and a high number of indigenous LAB (over one million per g). In contrast to several previous studies, the inoculants and enzymes had very little effect on rate and efficiency of fermentation. The 90-d treated silages had similar fiber and digestibility values, compared to the control. Treated silages tended to have higher lactic acid values, but all silages had relatively high …

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Effects Of Dietary Energy On Reproductive Function And Production In Suckled Beef Cows, R.C. Perry, L.R. Corah, W.E. Beal, G.H. Kiracofe, R.C. Cochran, D.D. Simms, J.R. Brethour, Jeffrey S. Stevenson Jan 1990

Effects Of Dietary Energy On Reproductive Function And Production In Suckled Beef Cows, R.C. Perry, L.R. Corah, W.E. Beal, G.H. Kiracofe, R.C. Cochran, D.D. Simms, J.R. Brethour, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Twenty-eight Hereford x Angus cows were utilized to determine the effects of dietary energy level before and after calving on reproductive function and production in suckled beef cows. Low levels of dietary energy before calving resulted in losses of body composition prior to calving, reduced calf birth weight, lengthened intervals from calving to ovulation, and decreased milk production and calf weight at 70 d of age (P<.05). Low levels of dietary energy after calving decreased measures of body composition after calving, reduced the percentage of cows that ovulated following calving, and decreased cow milk production and calf weight at 70 d of age (P<.05). We conclude that dietary energy before and after calving impacts the reproductive function and production of suckled beef cows.

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Diagnosis Of Freemartinism In Heifers Born Co-Twin To A Bull, B.L. Larson, G.H. Kiracofe Jan 1990

Diagnosis Of Freemartinism In Heifers Born Co-Twin To A Bull, B.L. Larson, G.H. Kiracofe

Kansas Agricultural Experiment Station Research Reports

The wide variance in anatomical characteristics among heifers born co-twin to a bull make diagnosis of freemartinism by measurements of vaginal length or the distance between the anus and vulva unreliable. Change in serum luteinizing hormone (LH) in response to injection of estrogen or gonadotropin releasing hormone (GnRH) is different in freemartins compared to normal heifers but is also an unreliable predictor of freemartinism. Presently, the most conclusive way to establish freemartinism in a heifer born co-twin to a bull is to measure the percentage of XX and XY chromosomes in cells from whole blood, which is a specialized and …

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Increasing Levels Of Grain Supplementation For Intensive-Early Stocked Steers: Two-Year Summary, R.C. Cochran, Robert T. Brandt Jr., E.S. Vanzant, E.M. Clary, Clenton E. Owensby Jan 1990

Increasing Levels Of Grain Supplementation For Intensive-Early Stocked Steers: Two-Year Summary, R.C. Cochran, Robert T. Brandt Jr., E.S. Vanzant, E.M. Clary, Clenton E. Owensby

Kansas Agricultural Experiment Station Research Reports

During the first 2 yr of a 4-yr experiment, increasing the level of grain sorghum supplementation (from 2 to 4 Ibid) for steers managed within an intensive-early stocking program tended to increase average daily gain in direct proportion to supplement level (2.3 (no supplement) to 2.5 and 2.7 lb/d, respectively). During both years, the amount of grass remaining in the pastures after the cattle were removed (July 15) and at the end of the growing season (October 1) was greater when cattle were supplemented with 4 lb of grain sorghum. Level of supplementation for grazing steers did not influence subsequent …

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Effect Of Deccox® In A Free-Choice, Grain-Mineral Mixture On Performance Of Yearlings Grazing Native Range, F.K. Brazle Jan 1990

Effect Of Deccox® In A Free-Choice, Grain-Mineral Mixture On Performance Of Yearlings Grazing Native Range, F.K. Brazle

Kansas Agricultural Experiment Station Research Reports

Including Deccox® in a free-choice, intake-limiting, grain-mineral mixture tended to increase grazing stocker gains and substantially reduced the percentage of newly arrived cattle treated for sickness and the number of treatments required per animal.

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Yield And Nutritional Quality Of Nine Summer Annual Forages, Gerry L. Kuhl, J.P. Shroyes, Paul D. Hartman, Dale L. Fjell Jan 1990

Yield And Nutritional Quality Of Nine Summer Annual Forages, Gerry L. Kuhl, J.P. Shroyes, Paul D. Hartman, Dale L. Fjell

Kansas Agricultural Experiment Station Research Reports

Nine summer annual forages were studied to evaluate yield and nutritional quality differences resulting from forage type and cultivar when cut at two stages of maturity. Substantial dry matter yield and quality differences were observed among the six hybrid pearl millets tested. Several hybrid pearl millets gave comparable dry matter yields to the sorghum-sudans at boot and headed stages of growth. Hybrid pearl millets were much higher in crude protein than the hybrid sorghum-sudans and sudangrass. Although yield increased markedly between boot and headed cutting stages, nutritional value declined greatly. Nitrate levels were excessively high in all forages when harvested …

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Dose Response To Supplemental Fat By Finishing Steers, S.M. Gramlich, Robert T. Brandt Jr., Ronald V. Pope Jan 1990

Dose Response To Supplemental Fat By Finishing Steers, S.M. Gramlich, Robert T. Brandt Jr., Ronald V. Pope

Kansas Agricultural Experiment Station Research Reports

A trial with 100 head of crossbred steers (avg wt 879 lb) was conducted to determine the effects of tallow (none, 2, 4, 6, 8% of ration dry matter) on the performance and carcass characteristics of finishing cattle fed a corn-based diet. Protein levels were maintained at a constant ratio to the calculated metabolizable energy concentration of the diets. Initially, feed intake decreased as tallow increased; however, similar intakes were obtained after 11 days. Dry matter intakes throughout the finishing period were reduced 5.2, 6.9 and 7.7%, respectively, for the 4, 6 and 8% tallow diets. Average daily gain was …

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Moderation Of Ruminal Fermentation By Protozoa In Cattle Fed High-Grain Diets, G. Towne, A.B. Beharka, Tiruvoor G. Nagaraja Jan 1990

Moderation Of Ruminal Fermentation By Protozoa In Cattle Fed High-Grain Diets, G. Towne, A.B. Beharka, Tiruvoor G. Nagaraja

Kansas Agricultural Experiment Station Research Reports

Ruminal protozoa in cattle fed high-grain diets appear to contribute to the maintenance of a stable ruminal fermentation. This was evidenced by higher ruminal pH's and lower volatile fatty acid concentrations in faunated (with protozoa) than defaunated (without protozoa) cattle. The moderation of fermentation was likely due to reduced bacterial numbers associated with the presence of protozoa.

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Effect Of Acidification On Starter Pig Performance And Nutrient Digestibility (1990), T L. Weeden, J A. Hansen, K L. Richardson, Jim L. Nelssen Jan 1990

Effect Of Acidification On Starter Pig Performance And Nutrient Digestibility (1990), T L. Weeden, J A. Hansen, K L. Richardson, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

One hundred ninety-six pigs (21 d of age and 12.3 lb initial wt) were used to evaluate the effect of adding an organic acid blend (OAB) to starter diets on growth performance and nutrient digestibility. The four dietary treatments consisted of a control diet and the GAB replacing corn at 3, 4.5, and 6 lb/ton in both phases 1 and 2. In phase 1 (0 to 14 d) diets, contained 20% dried skim milk, 20% dried whey, and 5% soybean oil. Phase 2 diets (15 to 35 d) contained 10% dried whey and 5% soybean oil. There was no response …

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Evaluation Of Attributes Affecting Tenderness Differences Between Bos Taurus And Bos Indicus Cattle, G. Whipple, M. Koohmaraie, J.D. Crouse, Melvin C. Hunt, R.D. Klemm, Michael E. Dikeman Jan 1990

Evaluation Of Attributes Affecting Tenderness Differences Between Bos Taurus And Bos Indicus Cattle, G. Whipple, M. Koohmaraie, J.D. Crouse, Melvin C. Hunt, R.D. Klemm, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Biological tenderness differences between longissimus muscles from 3/8 and 5/8 Sahiwal (Bos indicus) x Hereford-Angus and from Hereford-Angus (Bos taurus) were evaluated. No significant breed cross effects were observed for carcass traits or rates of pH and temperature decline. Loin steaks from Hereford x Angus had lower (P<.05) shear-force values and higher (P<.05) taste panel tenderness scores at 1 and 14 d postmortem. No breed effects existed for muscle fiber sarcomere length, muscle fiber type, muscle collagen, cathepsin enzyme activity, or calcium-dependent protease-I and -II activity. However, calcium-dependent protease inhibitor activity at 24 hr postmortem was greater (P<.01) in Sahiwal-crosses than for Hereford-Angus. Less protein degradation, which causes tenderization during aging, occurred in Sahiwal-crosses by d 14 than in Hereford-Angus at d 1 postmortem. Therefore, mechanisms involving calcium-dependent protease and its inhibitor may be the principal factors causing tenderness differences between Bos indicus and Bos taurus breeds.

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Effects Of Amaferm® (Aspergillus Oryzae Fermentation Extract) On Performance And Body Temperature Of Stockers Fed Diets With Or Without Fescue Endophyte, K.P. Coffey, F.K. Brazle, Joseph L. Moyer Jan 1990

Effects Of Amaferm® (Aspergillus Oryzae Fermentation Extract) On Performance And Body Temperature Of Stockers Fed Diets With Or Without Fescue Endophyte, K.P. Coffey, F.K. Brazle, Joseph L. Moyer

Kansas Agricultural Experiment Station Research Reports

Sixty-four stocker steers were offered endophyte-free fescue hay ad libitum, with either bromegrass or high-endophyte fescue seed screenings and supplements with or without Amaferm8 (Aspergillus oryzae fermentation extract). Steers offered bromegrass seed screenings gained faster (P<.01), consumed more feed (P<.01), and converted feed dry matter to gain more efficiently (P<.01) than those fed fescue seed screenings. Amaferm did not affect stocker performance or reduce rectal temperature. Therefore, feeding high-endophyte fescue screenings reduced intake and daily gain, and Amaferm did not offset those effects.

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Effects Of Processing Variables On Iridescence In Precooked Beef, H. Wang, Donald H. Kropf, Melvin C. Hunt, Curtis L. Kastner Jan 1990

Effects Of Processing Variables On Iridescence In Precooked Beef, H. Wang, Donald H. Kropf, Melvin C. Hunt, Curtis L. Kastner

Kansas Agricultural Experiment Station Research Reports

Beef semitendinosus (ST) muscles with injected water (3 or 10% of raw muscle weight) and phosphate (0.3%) were cooked to final internal temperatures of 130 (held at 130 for 121 min), 140 (held at 140 for 12 min), 145, or 155°1\ then sliced at 30, 45, 120, 130, or 145<>P by either a dull or a sharp slicer. Biceps femoris (BF) muscles had the same treatment but only at 3% water addition. Controls were uninjected muscles from the opposite side of the carcass. For ST muscles (all with 0.3% added phosphate), 3% added water resulted in less iridescence than …

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Comparison Of Steer Feedlot Performance And Carcass Trait Uniformity By Method Of Sorting, P.L. Houghton, D.D. Simms, James J. Higgins Jan 1990

Comparison Of Steer Feedlot Performance And Carcass Trait Uniformity By Method Of Sorting, P.L. Houghton, D.D. Simms, James J. Higgins

Kansas Agricultural Experiment Station Research Reports

Long yearling steers (n=997) of various biological types from two origins were used to test performance and carcass trait uniformity of unsorted cattle, visually sorted cattle, and cattle sorted by ultrasound and hip height. No significant differences (P>.05) in initial backfat uniformity were identified between sorted and unsorted groups; however, very little variation existed across all treatments (.17±.033 in.). Initial backfat had positive linear relationships with initial weight and carcass backfat and negative linear relationships with days on feed and daily gain (P<.05). These data indicate a reliable measurement of initial backfat could be useful for predicting days on feed and/or carcass backfat in long yearling steers, but economic usefulness will depend upon the variability of the cattle and the method of grouping.

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Preliminary Carcass And Meat Research Results From Cycle Iv Of The Cattle Germ Plasm Evaluation Program, L.V. Cundiff, R.M. Koch, K.E. Gregory, J.D. Crouse, Michael E. Dikeman Jan 1990

Preliminary Carcass And Meat Research Results From Cycle Iv Of The Cattle Germ Plasm Evaluation Program, L.V. Cundiff, R.M. Koch, K.E. Gregory, J.D. Crouse, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Preliminary data representing two of five calf crops in Cycle IV of the Germ Plasm Evaluation Program are reported. Carcass and meat data from 454 steers produced by mating 11 sire breeds to Hereford and Angus dams were obtained. Hereford (H) and Angus (A) sires born in the late 1960's (original) and also 1982 to 1984 (new) were compared. Steers sired by the new sample of H and A sires were heavier at slaughter than those of original sires, whereas marbling and percentages of trimmed retail product (% TRP) have not changed. HA and AH had lower % TRP than …

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Calves Delay Estrus Cycles In Postpartum Cows By Mechanisms Other Than Suckling, S.D. Viker, G.H. Kiracofe Jan 1990

Calves Delay Estrus Cycles In Postpartum Cows By Mechanisms Other Than Suckling, S.D. Viker, G.H. Kiracofe

Kansas Agricultural Experiment Station Research Reports

It is generally accepted that the suckling stimulus and the interactions between lactation and level of nutrition regulate the interval from calving to cycling in beef cows. However, rnastectomized cows (udder removed) kept with their calves had longer postpartum intervals to ovulation and estrus than mastectomized cows without calves. We conclude that ovulation and estrus can be suppressed by some cow-calf interaction that is independent of lactation and suckling.

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Cow/Calf Profitability: Case Studies Of Kansas Cattle Producers, D.D. Simms, T.T. Marston Jan 1990

Cow/Calf Profitability: Case Studies Of Kansas Cattle Producers, D.D. Simms, T.T. Marston

Kansas Agricultural Experiment Station Research Reports

Cost/return analyses of 56 Kansas cow/calf operations were summarized to determine the major factors influencing 1987 and 1988 cow herd profitability. Gross returns and costs on a per cow unit basis were extremely variable. with the bottom 1/3 of these operations essentially breaking even. whereas the high 1/3 profitability group averaged $228.40 per head in net cash returns. Both operating and fixed costs were major determinants of profitability. Reproductive rate (calves weaned per cow exposed) was the major production variable affecting profitability.

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