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Cattlemen's Day

1999

Articles 1 - 30 of 51

Full-Text Articles in Life Sciences

Sources Of Variability In Fed-Cattle Grid Pricing, J.L. Graff, Ted C. Schroeder Jan 1999

Sources Of Variability In Fed-Cattle Grid Pricing, J.L. Graff, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

Price variability among carcasses increases with a change from live-weight to dressedweight to grid pricing. Grid pricing has the largest price variability, because the price for each carcass is influenced by all of the components of the grid, rather than all cattle selling for the same live or dressed price. Therefore, producers selling on a grid need to have knowledge about the expected carcass merit of their cattle. We used data on 11,703 head of cattle to determine which grid pricing components influence price variability the most and to measure how much price variability increases from grid pricing, relative ...


Effects Of Supplementing Limit-Fed, Wheat Middling-Based Diets With Either Soybean Meal Or Non-Enzymatically Browned Soybean Meal On Growing Steer Performance, C.M. Coetzer, E. Coetzer, R.H. Wessels, James S. Drouillard Jan 1999

Effects Of Supplementing Limit-Fed, Wheat Middling-Based Diets With Either Soybean Meal Or Non-Enzymatically Browned Soybean Meal On Growing Steer Performance, C.M. Coetzer, E. Coetzer, R.H. Wessels, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Seventy two individually fed Angus x Hereford steers (660 lb) were limit-fed, 16.7% CP wheat middling-based diets with 1.9 or 3.8 percentage units of additional CP from either soybean meal (SBM) or non-enzymatically browned soybean meal (NEBSBM). A limitfed, rolled corn-based diet (16.7% CP) also was included. Steers were fed once daily for 70 days at 2.25% of BW. The SBM provided 30% bypass protein, and NEBSBM provided 68%. Average daily gain and efficiency improved linearly with increasing level of NEBSBM (P<.05; ADG=2.482 + .106 (increase in % CP); feed to gain=6.26 - .22(increase in % CP)), but not with increasing levels of SBM. Steers fed the wheat middling diets had lower ADG and efficiency than those fed the corn control diet. These data suggest that bypass protein may be first limiting in highconcentrate, limit-fed growing diets composed predominantly of wheat middlings.


Effects Of Post-Bleeding Vascular Infusion Of Cattle With A Solution Of Sugars, Sodium Chloride, And Phosphates Or With Calcium Chloride On Carcass Traits And Meat Palatability, T.E. Dobbels, Melvin C. Hunt, J.J. Schoenbeck, Michael E. Dikeman Jan 1999

Effects Of Post-Bleeding Vascular Infusion Of Cattle With A Solution Of Sugars, Sodium Chloride, And Phosphates Or With Calcium Chloride On Carcass Traits And Meat Palatability, T.E. Dobbels, Melvin C. Hunt, J.J. Schoenbeck, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

We evaluated the effects of postexsanguination vascular infusion at 10% of live weight of a solution of sugars, sodium chloride, and phosphates (MPSC) or of calcium chloride on carcass traits and meat palatability. Dressing percentages were 4% higher for carcasses infused with the MPSC and 2.5 % higher for carcasses infused with calcium chloride than for controls. USDA quality grades were not affected by vascular infusion. Infusion with calcium chloride caused undesirable intermuscular fluid accumulation and two-toned color in several muscles. It also caused higher Warner- Bratzler shear values and lower trained sensory panel scores (P<.05). MPSC infusion may offer financial benefits by increasing dressing percent, but it has no other major effects.


Effects Of Grain Type On Growth And Performance Of Steers Limit-Fed Grain-Based Diets, R.D. Hunter, T. Nutsch, Evan C. Titgemeyer, James S. Drouillard Jan 1999

Effects Of Grain Type On Growth And Performance Of Steers Limit-Fed Grain-Based Diets, R.D. Hunter, T. Nutsch, Evan C. Titgemeyer, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Five hundred fifty two steers were used in a growth experiment designed to evaluate the use of grain sorghum in a limit-feeding program. Dry-rolled corn, dry-rolled grain sorghum, steam-flaked grain sorghum, or combinations of grains totaled 70% (dry matter basis) of the diet. Daily intakes were restricted to 2% of body weight (dry matter basis). Cattle were fed their assigned diet for 95 days followed by a 5- day period on a common diet to compensate for differences in gut fill. Steam-flaked grain sorghum and dry-rolled corn yielded similar gain efficiencies and average daily gains. Dry-rolled grain sorghum, however, had ...


Lactic Acid, Hot Water, And Microwave Treatment To Reduce Natural Microflora And Pathogens In Vacuum-Packaged Beef, D.H. Kang, B.A. Crozier-Dodson, G. Jiang, X. Shi, Daniel Y.C. Fung Jan 1999

Lactic Acid, Hot Water, And Microwave Treatment To Reduce Natural Microflora And Pathogens In Vacuum-Packaged Beef, D.H. Kang, B.A. Crozier-Dodson, G. Jiang, X. Shi, Daniel Y.C. Fung

Kansas Agricultural Experiment Station Research Reports

Combined lactic acid (2%), hot water, and microwave treatments were used to reduce natural microflora and the pathogens Escherichia coli O157:H7, Salmonella typhimurium, and Listeria monocytogenes in vacuum-packaged beef. Hot water at 158EF followed by vacuum packaging and 5 sec. of microwave were acceptable for microbial reduction. Dipping inoculated meat for 20 sec. into 2% room temperature lactic acid prior to that treatment at 158EF reduced E. coli O157:H7 by 1.05 log CFU/cm2, S. typhimurium by .7 log CFU/cm2, and L. monocytogenes by .85 log CFU/cm2 (CFU is colony forming unit). One log equals ...


Impacts Of Wheat Milling By-Products In Supplements On The Intake And Digestion Of Steers Consuming Low-Quality Forage, C.G. Farmer, R.C. Cochran, D.D. Simms, J.S. Heldt, C.P. Mathis Jan 1999

Impacts Of Wheat Milling By-Products In Supplements On The Intake And Digestion Of Steers Consuming Low-Quality Forage, C.G. Farmer, R.C. Cochran, D.D. Simms, J.S. Heldt, C.P. Mathis

Kansas Agricultural Experiment Station Research Reports

Sixteen ruminally fistulated steers were used to evaluate the effects of feeding supplements containing combinations of two wheat-milling by-products on forage intake, digestibility, and ruminal characteristics. The by-products accounted for 47 to 49% of each supplement and were as follows: 1) 100% wheat bran; 2) 67% wheat bran, 33% second clears; and 3) 33% wheat bran, 67% second clears. All supplements contained about 30% CP. Compared with unsupplemented controls, forage intake and digestibility were significantly higher for supplemented steers. However, no differences occurred among by-product treatments. In conclusion, if the protein content is adequate, the choice of bran (high digestible ...


Wheat Bran And Second Clears As Supplemental Energy Sources For Beef Cows Grazing Winter Pasture, C.G. Farmer, R.C. Cochran, D.D. Simms, J.S. Heldt, C.P. Mathis Jan 1999

Wheat Bran And Second Clears As Supplemental Energy Sources For Beef Cows Grazing Winter Pasture, C.G. Farmer, R.C. Cochran, D.D. Simms, J.S. Heldt, C.P. Mathis

Kansas Agricultural Experiment Station Research Reports

Ninety spring-calving Hereford x Angus cows grazing low-quality, tallgrass-prairie forage during the winter were fed 5 lb/day of a supplement containing combinations of wheat bran (high in digestible fiber) and second clears (high in starch). The by-product combinations accounted for 47 to 49% of each supplement, as follows: 1) 100% wheat bran; 2) 67% wheat bran, 33% second clears; and 3) 33% wheat bran, 67% second clears. Cow performance was measured by changes in body weight and body condition score. The combinations of wheat bran and second clears had no significant effects on cow performance, calf birth weights, calf ...


Sarcina Ventriculi As The Potential Cause Of Abomasal Bloat, T.J. Schemm, B.M. Debey, Tiruvoor G. Nagaraja Jan 1999

Sarcina Ventriculi As The Potential Cause Of Abomasal Bloat, T.J. Schemm, B.M. Debey, Tiruvoor G. Nagaraja

Kansas Agricultural Experiment Station Research Reports

Sarcina-like bacteria, possibly Sarcina ventriculi, have been seen upon histopathologic examination of the abomasums of calves that died of abomasal bloat. The ability of the organism to grow at a low pH and produce large amounts of gas suggests that it may be the cause of abomasal bloat.


Comparison Of Morbidity And Performance Among Stressed Feeder Calves Following Vaccination With Pyramid™ Mlv 4 Or Pyramid™ 4+Presponse® Sq, S. Ives, James S. Drouillard, David E. Anderson, Gerald L. Stokka, Gerry L. Kuhl Jan 1999

Comparison Of Morbidity And Performance Among Stressed Feeder Calves Following Vaccination With Pyramid™ Mlv 4 Or Pyramid™ 4+Presponse® Sq, S. Ives, James S. Drouillard, David E. Anderson, Gerald L. Stokka, Gerry L. Kuhl

Kansas Agricultural Experiment Station Research Reports

A study was conducted to compare performance, morbidity, retreatment percent, and mortality in stressed heifer calves during the receiving and growing phases after receiving either Pyramid™ MLV 4 or Pyramid™ 4+Presponse® SQ on arrival at a feedlot research facility. Vaccination with Pyramid 4+Presponse SQ (a 4-way viral modified live vaccine with a Pasteurella haemolytica bacterin-toxoid) tended to reduce the incidence of bovine respiratory disease (P=.2) and reduced retreatment rate (P<.06).


Effects Of Repetitive High Energy Pulsed Power (Rhepp) Irradiation On Sensory Attributes, Color, And Shelf Life Of Ground Beef, K.A. Hachmeister, Donald H. Kropf, V.S. Gill, R.J. Kaye, Melvin C. Hunt, James L. Marsden, Curtis L. Kastner Jan 1999

Effects Of Repetitive High Energy Pulsed Power (Rhepp) Irradiation On Sensory Attributes, Color, And Shelf Life Of Ground Beef, K.A. Hachmeister, Donald H. Kropf, V.S. Gill, R.J. Kaye, Melvin C. Hunt, James L. Marsden, Curtis L. Kastner

Kansas Agricultural Experiment Station Research Reports

We investigated the effects of packaging atmosphere and three levels of irradiation dose (Repetitive High Energy Pulsed Power, - RHEPP) on microbial populations, vitamin retention, and display color attributes of ground beef patties stored either chilled or frozen. Beef knuckles and beef fat were coarsely ground, sampled and analyzed to achieve 20% fat, mixed, ground through a 1/8 in. plate, and processed into 1/4-lb patties, which were sealed either aerobically or nitrogen-flushed. Patties were not irradiated or irradiated to 1.5 or 3.0 kGy, chilled, and displayed at 37 ± 4EF for 6 days under 150 foot-candles of Deluxe ...


Antibacterial Effectiveness Of A Second Generation Steam Pasteurization™ System For Beef Carcass Decontamination, A. Truax, S. Sporing, S.A. Rueger, M. Schafer, L.K. Bohra, L. Harris, Randall K. Phebus, Deanna D. Retzlaff Jan 1999

Antibacterial Effectiveness Of A Second Generation Steam Pasteurization™ System For Beef Carcass Decontamination, A. Truax, S. Sporing, S.A. Rueger, M. Schafer, L.K. Bohra, L. Harris, Randall K. Phebus, Deanna D. Retzlaff

Kansas Agricultural Experiment Station Research Reports

The original commercial Steam Pasteurization ™ System (SPS 400) involved a sealable moving car by which carcass sides were carried through the steam chamber at standard line speeds. A second generation "static chamber" system (SPS 400-SC) eliminates the mechanical moving car and has been installed in a large beef slaughter facility. We collected data to verify SPS 400-SC's effectiveness at chamber temperatures from 185 to 205EF in a batch process mode (only test carcasses passing through the unit at variable intervals to facilitate collection of research samples) and at 190EF with the system running continuously. Tissue samples were obtained from ...


Incidence Of Premature Browning During Cooking In Ground Beef Purchased At Retail, Melvin C. Hunt, K.M. Killinger, R.E. Campbell Jan 1999

Incidence Of Premature Browning During Cooking In Ground Beef Purchased At Retail, Melvin C. Hunt, K.M. Killinger, R.E. Campbell

Kansas Agricultural Experiment Station Research Reports

We measured the incidence of premature browning during cooking in ground beef that was purchased from retail supermarkets and prepared using common household procedures. Patties made from meat on the outer portion of the packages purchased in the morning had the highest incidence of premature browning (62.5%). Patties from inner portions of packages purchased in the afternoon, refrigerated, and prepared the next morning were more (P<0.05) purple and had the lowest incidence (25%) of premature browning. Overall incidence of premature browning averaged 47%. Because internal cooked color of ground beef is such an unreliable indicator of doneness, temperature measurements should be used to verify that safe endpoint temperatures have been reached.


Inhibition Of Heterocyclic Amine Formation In Ground Beef, B.G. Abdulkarim, J. Scott Smith Jan 1999

Inhibition Of Heterocyclic Amine Formation In Ground Beef, B.G. Abdulkarim, J. Scott Smith

Kansas Agricultural Experiment Station Research Reports

he natural antioxidant carnosine, moisture retention by covered cooking, and low temperature cooking were evaluated as ways to inhibit heterocyclic amine (HCA) formation in fried ground beef. Samples were fried at 375EF for 5 min/side, 300EF for 5 min/side, or 250EF for 8 min/side, with surface browning enhanced by applying a caramel solution (Maillose®) near the end of cooking times. Analysis for HCAs was performed on both the crust and the whole patties. Carnosine reduced 4,8-DiMelQx, a major HCA, to below its detection limit (.31 ng/g). HCAs were reduced when the cooking temperature was lowered ...


Color Stability Of Steaks From Carcasses Vascularly Infused Immediately After Exsanguination, Melvin C. Hunt, J.J. Schoenbeck, T.E. Dobbels, Michael E. Dikeman, Sally L. Stroda Jan 1999

Color Stability Of Steaks From Carcasses Vascularly Infused Immediately After Exsanguination, Melvin C. Hunt, J.J. Schoenbeck, T.E. Dobbels, Michael E. Dikeman, Sally L. Stroda

Kansas Agricultural Experiment Station Research Reports

Hereford x Angus carcasses were infused with a solution of either sugar/phosphate or calcium chloride immediately after exsanguination to determine effects on color stability during retail display. A calcium chloride solution darkened the cuts and reduced color stability. A sugar/phosphate blend made steaks appear lighter red (more desirable), and their color stability was equal to that of the noninfused control.


Effects Of Post-Bleeding Vascular Infusion Of Cattle With A Solution Of Sugars, Sodium Chloride, And Phosphates With Or Without Vitamin C On Carcass Traits, Warner-Bratzler Shear Forces, And Patalability, E.J. Yancey, T.E. Dobbels, E. Katasanidis, Michael E. Dikeman, Edgar Chambers Iv Jan 1999

Effects Of Post-Bleeding Vascular Infusion Of Cattle With A Solution Of Sugars, Sodium Chloride, And Phosphates With Or Without Vitamin C On Carcass Traits, Warner-Bratzler Shear Forces, And Patalability, E.J. Yancey, T.E. Dobbels, E. Katasanidis, Michael E. Dikeman, Edgar Chambers Iv

Kansas Agricultural Experiment Station Research Reports

Two groups of grain-finished, crossbred Charolais steers were utilized to determine the effects of post-bleeding vascular infusion on dressing percentages, USDA quality and yield grades, Warner-Bratzler shear force values, and flavor. Nine steers from one group of 18 were infused with a solution containing sugars, sodium chloride, and a phosphate blend (MPSC), and the remaining nine steers served as noninfused controls. Nine in the second slaughter group of 18 were MPSC-infused, and nine were infused with the MPSC solution plus 500 ppm vitamin C (MPSC+C). The MPSC cattle had a 2.9% higher mean dressing percentage (P<.05) than control cattle. Vascular infusion had no effect (P>.05) on ...


Evaluations Of Beef Tenderness By Warner-Bratzler Shear Force, A Descriptive-Texture Profile Sensory Panel, And A Descriptive Attribute Sensory Panel, M.M. Otremba, Edgar Chambers Iv, Michael E. Dikeman, George A. Milliken, Sally L. Stroda, John A. Unruh Jan 1999

Evaluations Of Beef Tenderness By Warner-Bratzler Shear Force, A Descriptive-Texture Profile Sensory Panel, And A Descriptive Attribute Sensory Panel, M.M. Otremba, Edgar Chambers Iv, Michael E. Dikeman, George A. Milliken, Sally L. Stroda, John A. Unruh

Kansas Agricultural Experiment Station Research Reports

his study examined interrelationships among Warner-Bratzler shear force (WBSF), evaluation by a highly trained descriptive-texture- profile (DTP) sensory panel, and evaluation by a trained descriptive attribute (DA) sensory panel as affected by muscle fiber orientation of samples. Eighteen longissimus lumborum and 18 semitendinosus muscles from Choice and Select carcasses were cut into 1- inch steaks and cooked to 150EF. Cores were obtained by two methods (parallel to the muscle fiber orientation and perpendicular to the cut steak surface) for WBSF determinations. Cubes ½ x ½ x 1 in. were presented to the DTP and DA sensory panels. Cores taken parallel ...


Modeled, Multistage Convection Cooking Of Beef Semitendinosus Roasts To Denature Collagen And To Optimize Tenderness, T.H. Powell, Melvin C. Hunt, Michael E. Dikeman Jan 1999

Modeled, Multistage Convection Cooking Of Beef Semitendinosus Roasts To Denature Collagen And To Optimize Tenderness, T.H. Powell, Melvin C. Hunt, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

In order to predict and establish cooking times and temperatures of beef to optimize tenderness and cooked yield, a computer model was developed utilizing heat and mass transfer theories. We cooked beef semitendinosus (eye of round) roasts in a forced-air convection oven using conventional or modeled, multistaged cooking. Conventional cooking was defined as cooking at 325EF to a core endpoint of 150EF. The model method was developed using a computer algorithm that predicted heat and moisture (mass) transfer during a three-stage cooking process that included preheating, holding, and finishing. The model was accurate in predicting actual cooking times and temperatures ...


Use Of Linear Measurements In A Regression Equation To Predict Ribeye Area, A.T. Waylan, R.E. Campbell, John A. Unruh Jan 1999

Use Of Linear Measurements In A Regression Equation To Predict Ribeye Area, A.T. Waylan, R.E. Campbell, John A. Unruh

Kansas Agricultural Experiment Station Research Reports

Thirty beef carcasses were used to test the accuracy of three regression equations to predict ribeye area (REA) and to compare several strategies to rapidly estimate REAs. Linear measurements, USDA grids, and Video Image Analysis (VIA) were used to determine REA from both right and left carcass sides. Ribeye areas measured by USDA grids and estimated by regression equations were highly correlated (r>.94) with REA measured by VIA. Regression equations using linear measurements and USDA grids were equally (P=.73) accurate in predicting VIA REA. Furthermore, REA from either the left or the larger (right or left) carcass sides ...


Runoff Compliance For Kansas Cattle Feedlots, James P. Murphy, Joseph P. Harner Jan 1999

Runoff Compliance For Kansas Cattle Feedlots, James P. Murphy, Joseph P. Harner

Kansas Agricultural Experiment Station Research Reports

As the demand grows for cleaner water, feedlots will need to reduce and control the nutrient and sediment loading of runoff. Existing confined feedlots will need to evaluate their runoff potential. Costs of controlling the runoff must be weighed against new lot construction on an alternate location. New feedlot facilities will need to address current regulations and be designed for compliance with future regulations.


An Efficiency Analysis Of Cattle Backgrounding Operations In Kansas, L. Gow, Michael R. Langemeier Jan 1999

An Efficiency Analysis Of Cattle Backgrounding Operations In Kansas, L. Gow, Michael R. Langemeier

Kansas Agricultural Experiment Station Research Reports

As the structure of the beef industry changes, understanding its efficiency, cost, and profitability relationships is important. This study evaluates the relative efficiency of a sample of Kansas farm backgrounding and backgrounding/finishing operations for 1995- 1997. No commercial feeders were included. On average, backgrounding operations were 71% technically efficient, 68% allocatively efficient, 83% scale efficient, and 39% overall efficient. The results suggest that Kansas backgrounding operations could reduce their cost by 61%, if all farms were producing at the lowest possible cost. On average, backgrounding/finishing operations were 84% technically efficient, 79% allocatively efficient, 90% scale efficient, and 60 ...


Evaluation Of Springtime Deworming Strategies For Beef Cow/Calf Pairs, M.L. Pfeifer, J.C. Baker, J.T. Seeger, Dale A. Blasi, Glenn E. Newdigger Jr. Jan 1999

Evaluation Of Springtime Deworming Strategies For Beef Cow/Calf Pairs, M.L. Pfeifer, J.C. Baker, J.T. Seeger, Dale A. Blasi, Glenn E. Newdigger Jr.

Kansas Agricultural Experiment Station Research Reports

A field study was conducted at three different locations in south central Kansas to determine the effects of Dectomax® (DECTO) or Ivomec PO® (IVO) compared to no treatment (CONT) on the liveweight gain and reproductive performance of beef cow/calf pairs. Across all three locations, no differences occurred among treatments in cow and calf live weight gain, cow body condition, pregnancy rate, or age of fetus (P>.05). Low egg counts suggest that the parasite load was too low for a response to parasite control.


Synchronizing Estrus In Replacement Beef Heifers Using Select Synch, Mga, And Pgf2, G.C. Lamb, J.A. Cartmill, B.A. Hensley, S. El-Zarkouny, J.S. Heldt, T.J. Marple, Jeffrey S. Stevenson Jan 1999

Synchronizing Estrus In Replacement Beef Heifers Using Select Synch, Mga, And Pgf2, G.C. Lamb, J.A. Cartmill, B.A. Hensley, S. El-Zarkouny, J.S. Heldt, T.J. Marple, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

The Select Synch protocol (GnRH at day - 7, PGF2 at day 0, AI at detected heat) was compared to protocols using either MGA + prostaglandin (Colorado system) or two injections of prostaglandin to synchronize estrus in replacement heifers at three locations. Percentage of heifers detected in heat before, during, or after the target breeding week was not different among treatments but varied in percentages among locations. Overall conception rates ranged from 64 to 69%. Pregnancy rates varied from 46 to 56% and tended to be greatest in the MGA + PGF2" treatment. Costs of these treatments ranged from $3.50 to $8 ...


Vegetative Filters For Improving Environmental Quality, P.K. Kalita, Joseph P. Harner Jan 1999

Vegetative Filters For Improving Environmental Quality, P.K. Kalita, Joseph P. Harner

Kansas Agricultural Experiment Station Research Reports

Nonpoint source pollution from agricultural areas has been recognized as a major contributor of surface and groundwater quality problems. Sediments, pesticide and nutrient runoffs, and microbial pathogens from farmlands may severely affect quality of water resources. A majority of Kansas river basins contains high concentrations of fecal coliforms, nitrogen, phosphorus, and sediments. The use of vegetative filters strips (VFS) has been identified as one of the best management practices to reduce pollutant concentrations in surface water sources. Vegetation planted between pollutant sources and receiving water accomplishes this by filtration, deposition, infiltration, adsorption, volatilization, plant uptake, and decomposition processes. The effectiveness ...


Prevalence Of Ocular Lesions In Cattle From A Kansas Sale Barn, H.J. Davidson, Gerald L. Stokka, Tom Taul Jan 1999

Prevalence Of Ocular Lesions In Cattle From A Kansas Sale Barn, H.J. Davidson, Gerald L. Stokka, Tom Taul

Kansas Agricultural Experiment Station Research Reports

This cross-sectional evaluation of cattle from a sale barn was completed to identify the prevalence of ocular lesions. A total of 100 cattle (91 cows and 9 bulls) was examined as they were being processed through a Kansas sale barn. Ocular lesions were found in 47%. The most frequently identified lesions were corneal scars, found in 26%. Although the exact cause of the scars could not be determined, they were similar in appearance to scars caused by infectious bovine keratoconjunctivitis (IBK) or pinkeye. The second most common lesion was squamous cell carcinoma (SCC), identified in 14%. Cataracts were identified in ...


Fixed-Time Insemination Of Suckled Beef Cows. 1. Select Synch, Cosynch, And Their Combination, K. E. Thompson, G.C. Lamb, Jeffrey S. Stevenson, David M. Grieger Jan 1999

Fixed-Time Insemination Of Suckled Beef Cows. 1. Select Synch, Cosynch, And Their Combination, K. E. Thompson, G.C. Lamb, Jeffrey S. Stevenson, David M. Grieger

Kansas Agricultural Experiment Station Research Reports

As in our previous studies, the GnRH + PGF2" treatment was very effective in inducing a fertile estrus and(or) ovulation. Ovulations induced in response to the first GnRH injection averaged 48% in three herds and ranged from 44 to 56%. The proportion of 536 cows that were cycling at the beginning of the breeding season averaged 48% and ranged from 35 to 59%. Conception rate was greater in Select Synch cows (those inseminated after detected estrus) than in cows in other breeding treatments. Pregnancy rates tended to be greater in Select Synch cows than in cows of other treatments. A ...


Fixed-Time Inseminaton Of Suckled Beef Cows. 2. Cosynch And Progesterone, G.C. Lamb, J.A. Cartmill, B.A. Hensley, T.J. Marple, Jeffrey S. Stevenson Jan 1999

Fixed-Time Inseminaton Of Suckled Beef Cows. 2. Cosynch And Progesterone, G.C. Lamb, J.A. Cartmill, B.A. Hensley, T.J. Marple, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

The Cosynch protocol (GnRH 7 days before and again 48 h after PGF2" with AI at the second GnRH injection) produced pregnancy rates in suckled beef cows that exceeded 50% without heat detection and with only three handlings of all cows. The addition of an intravaginal progesterone insert to the Cosynch protocol improved pregnancy rates in two of the three breeds of cows studied.


Genetic Associations Of Growth And Lactation Curve Components In Polled Hereford Cattle, J.B. Jr. Glaze, R.R. Schalles Jan 1999

Genetic Associations Of Growth And Lactation Curve Components In Polled Hereford Cattle, J.B. Jr. Glaze, R.R. Schalles

Kansas Agricultural Experiment Station Research Reports

Weight and milk production records of Polled Hereford cows born from 1967 to 1979 were used to fit growth and lactation curves. A multiple-trait, derivative-free, restricted maximum likelihood (MTDFREML) procedure, utilizing a full animal model, was used to estimate variances and covariances for the components of the growth and lactation curves. For the growth curve, W=A+B(1-e-kt) components A, B, and k each had moderate to high heritabilities ranging from .35 to .72. The genetic correlation between growth curve components A and B was positive (.42), whereas the genetic correlations between A and K (-.34) and between B ...


Selection Response For Feed Conversion And Growth Traits In Polled Hereford Cattle, J.B. Jr. Glaze, R.R. Schalles Jan 1999

Selection Response For Feed Conversion And Growth Traits In Polled Hereford Cattle, J.B. Jr. Glaze, R.R. Schalles

Kansas Agricultural Experiment Station Research Reports

Direct and correlated responses to selection for improved feed conversion were estimated from performance records of 1459 Polled Hereford cattle born from the spring of 1967 through the spring of 1979. Data were analyzed using a multiple-trait, derivative-free, restricted maximum likelihood (MTDFREML) procedure. A full animal model was used to calculate genetic and phenotypic (co)variances. The withinherd breeding values that resulted from the solution of the mixed model equations were regressed on year to create selection response curves. Feed conversion was shown to respond favorably to direct selection, with feed/gain changing -.005 per year.


Feeding Raw Soybeans To Finishing Cattle, T.T. Marston, K.K. Kreikemeier, J.F. Gleghorn, G.L. Huck, T.J. Wistuba Jan 1999

Feeding Raw Soybeans To Finishing Cattle, T.T. Marston, K.K. Kreikemeier, J.F. Gleghorn, G.L. Huck, T.J. Wistuba

Kansas Agricultural Experiment Station Research Reports

Two finishing trials were performed to determine if raw soybeans could be incorporated into diets to partially replace soybean meal and beef tallow. Our data indicated that no sacrifices in animal performance, feed efficiency, and carcass quality will occur if cattle feeders replace soybean meal and tallow with raw dryrolled soybeans. The feeding value of raw soybeans is equal to .8 times the value of 44% CP soybean meal plus .2 times the value of fancy bleachable tallow. Raw soybeans contain the enzyme, urease, which converts urea to ammonia. Therefore, caution should be used in mixing raw soybeans with urea-containing ...


Evaluating Corn And Corn Gluten Feed In Growing Cattle Diets As A Replacement For Roughage, N.G. Whitham, C.M. Coetzer, R.D. Hunter, James S. Drouillard, Dale A. Blasi, Evan C. Titgemeyer Jan 1999

Evaluating Corn And Corn Gluten Feed In Growing Cattle Diets As A Replacement For Roughage, N.G. Whitham, C.M. Coetzer, R.D. Hunter, James S. Drouillard, Dale A. Blasi, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

A 99-day study was conducted to evaluate growth performance of 216 beef heifers (average 524 lb) fed traditional roughage-based diets at 2.75% of body weight or limit-fed highconcentrate diets containing corn or corn gluten feed fed at 2.0% of body weight. Dietary treatments included roughage plus corn, roughage plus corn gluten feed, limit-fed corn, limitfed corn with added Smartamine®-ML (providing 10 g/day ruminally protected lysine), limitfed corn gluten feed, and limit-fed corn gluten feed with added Smartamine. Adding Smartamine-ML to the diet did not improve performance significantly compared to unsupplemented groups (P>.30). Limit-fed diets containing ...