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Kansas Agricultural Experiment Station Research Reports

1992

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Articles 1 - 30 of 97

Full-Text Articles in Life Sciences

Waste Management In The Production Dairy Indistry, C. Fulhage Jan 1992

Waste Management In The Production Dairy Indistry, C. Fulhage

Kansas Agricultural Experiment Station Research Reports

The impact of environmental regulation on livestock production enterprises is, inevitably, an increase in production costs. Producers should recognize that these are the costs of doing business and will probably have to be incurred by all producers who stay in business and remain viable. With proper input to the regulation process and implementation of practical and effective methods of manure management, most producers should be able to maintain viable enterprises.; Dairy Day, 1992, Kansas State University, Manhattan, KS, 1992;


Fish Meal As A Protein Source For Holstein Steer Calves, J.L. Morrill, J.F. Laster, J.M. Morrill, A.M. Feyerherm Jan 1992

Fish Meal As A Protein Source For Holstein Steer Calves, J.L. Morrill, J.F. Laster, J.M. Morrill, A.M. Feyerherm

Kansas Agricultural Experiment Station Research Reports

Holstein steer calves (n = 96) were on experiment from 8 to 18 wk of age. Control calves were fed a diet in which all supplemental protein was from soybean meal; in the experimental diet, part of the soybean meal was replaced by fish meal. Both feeds were readily consumed, and consumption did not differ between treatments. Gains of calves fed fish meal were greater (P = .10) during the first 8 wk of the experiment; however, over the entire experiment, the difference was not significant. Overall results suggest that fish meal may improve weight gains and feed efficiency of younger and ...


Ovarian Follicular Waves And Secretion Of Follicle-Stimulating Hormone After Administration Of Gnrh At Estrus, J.R. Pursley, Jeffrey S. Stevenson Jan 1992

Ovarian Follicular Waves And Secretion Of Follicle-Stimulating Hormone After Administration Of Gnrh At Estrus, J.R. Pursley, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

An experiment was conducted to examine the effects of GnRH on the secretion of FSH, LH, estradiol, and progesterone in serum and changes in ovarian structures. Dairy cows were assigned randomly to receive either 100 μg of GnRH or saline 12 hr after estrus (day 0) was detected. Blood was collected daily to assess changes in serum estradiol and progesterone and every 12 min for 8 hr on days 8 and 15 after estrus to assess concentrations of FSH and LH. Diameter and number of follicles were determined daily by real-time ultrasonography. Two patterns of follicular development were observed. The ...


Induction Of Estrus In Thyroidectomized-Ovariectomized, Nonlactating, Holstein Cows, R.E. Stewart, M.O. Mee, I. Rettmer, Jeffrey S. Stevenson Jan 1992

Induction Of Estrus In Thyroidectomized-Ovariectomized, Nonlactating, Holstein Cows, R.E. Stewart, M.O. Mee, I. Rettmer, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Low thyroid activity (hypothyroidism) has been reported to decrease sexual behavior associated with reproduction in several species. Using estradiol benzoate (EB) and progesterone (P ), we attempted to induce 4 estrus in hypothyroid cows. Thyroid glands (thyroidectomy) and ovaries (ovariectomy) were removed surgically from nonlactating and nonpregnant Holstein cows that were culled from the Kansas State University dairy herd. Eight cows were thyroidectomized and ovariectomized (THYOVEX) and another four cows were ovariectomized only (OVEX). Starting 9 hr after injection of EB, cows were continuously observed for estrus for 36 hr. Frequencies of mounting activity and standing behavior were recorded for each ...


Interrelationship Between Copper And Bovine Health, Robert L. Larson, J.D. Arthington, L.R. Corah Jan 1992

Interrelationship Between Copper And Bovine Health, Robert L. Larson, J.D. Arthington, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

Trace mineral nutrition is important to production efficiency and animal health. Trace mineral imbalances may be the roots of many diagnosed or undiagnosed problems in a herd. The low cost of a complete mineral analysis when compared to production losses encourages its use in the evaluation of any bovine herd in which trace mineral imbalances are suspected. A systematic gathering of information on mineral intake, antagonist intake, and serum and tissue values is necessary in order to make a diagnosis and a rational treatment decision. It is important to understand the complex interactions between minerals so that supplementation with one ...


1992 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service Jan 1992

1992 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service

Kansas Agricultural Experiment Station Research Reports

No abstract provided.


Effect Of Physical Form And Level Of Alfalfa In Corn-Based Diets For Finishing Steers, Robert T. Brandt Jr., Ronald V. Pope Jan 1992

Effect Of Physical Form And Level Of Alfalfa In Corn-Based Diets For Finishing Steers, Robert T. Brandt Jr., Ronald V. Pope

Kansas Agricultural Experiment Station Research Reports

One hundred-eighty British crossbred steers (760 lb) were used in a 3x2 factorially arranged experiment to evaluate the main effects of alfalfa form (chopped hay, dehydrated pellets, or a 50:50 mixture of hay:dehy) and level (5 or 10% of diet DM) on finishing steer performance. Alfalfa (third-cutting, 23.9% CP) was harvested in alternate rows from a common field. No interactions between alfalfa form and level were detected. Steers fed chopped hay or the 50:50 mixture gained faster (P < .05), consumed more feed (P < .05), and had heavier final and carcass weights (P < .05) than steers fed dehy pellets. Steers fed 10% alfalfa gained faster (P < .05), consumed more feed (P < .0003), and had heavier carcass weights (P < .02) vs those fed 5% alfalfa. Feed efficiency was unaffected by alfalfa form or level. Lower feed intakes and numerically higher incidences of liver abscesses indicated less ruminal tactile stimulation and more subacute acidosis for dehy pellets vs hay or the 50:50 mixture and for 5 vs 10% alfalfa, respectively. Positive associative responses of 5.1% (P = .07) on daily gain and 2.9% (P = .11) on dry matter intake suggested that the 50:50 mixture provided enough long particles for adequate rumen function at the alfalfa levels studied. Our results suggests more dehy pellets than chopped hay must be fed to provide similar roughage value.


Rate And Extent Of Losses From Top Spoilage In Pilot-Scale, Horizontal Silos, J.T. Dickerson, K.K. Bolsen, B.E. Brent, C. Lin, John E. Boyer Jan 1992

Rate And Extent Of Losses From Top Spoilage In Pilot-Scale, Horizontal Silos, J.T. Dickerson, K.K. Bolsen, B.E. Brent, C. Lin, John E. Boyer

Kansas Agricultural Experiment Station Research Reports

Corn and forage sorghum silages were stored in pilot-scale silos for 180 days, and dry matter (DM) and organic matter (OM) recoveries and estimated OM recovery were measured at three depths within the top 3 ft. of silage. The unsealed silages deteriorated badly in the top 12 in. Actual DM and OM losses in the top 24 in. were higher in unsealed than sealed silages at each successive storage period (7 to 180 days). The unsealed silages began to deteriorate immediately in the top 12 in. in both crops, and deterioration progressed to the second 12 in. by 90 days ...


Influence Of Fat And Monensin Levels On Performance Of Finishing Steers, Robert T. Brandt Jr., Ronald V. Pope Jan 1992

Influence Of Fat And Monensin Levels On Performance Of Finishing Steers, Robert T. Brandt Jr., Ronald V. Pope

Kansas Agricultural Experiment Station Research Reports

To evaluate effects and potential interaction of supplemental fat (0 to 4% tallow) and monensin (0, 20, 40 g/ton) in a corn-based finishing diet, 96 Continental crossbred steers (860 lb) were used in a 2x3 factorially arranged randomized complete block design. Consumption by steers fed the 0% fat diet decreased linearly (P<.0001) with increased monensin level, whereas consumption by steers fed 4% fat diets decreased curvilinearly (P<.08), indicating that monensin depressed intake much less when the diet contained fat. Daily gain decreased linearly (P<.02) with increased monensin level for steers fed no supplemental fat, but remained constant in steers fed 4% fat. Feed efficiency was improved (P<.025) by 4% fat across levels of monensin. This study provides further evidence of interactions between monensin and supplemental fat in effects on animal performance.


The Effects Of Slow-Release Copper Boluses On Cow Reproductive Performance And Calf Growth, J.D. Arthington, Robert L. Larson, L.R. Corah Jan 1992

The Effects Of Slow-Release Copper Boluses On Cow Reproductive Performance And Calf Growth, J.D. Arthington, Robert L. Larson, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

Two Kansas cow/calf herds known to be copper deficient were utilized to examine the effect of slow-release copper boluses. In herd I, 34 spring-calving cows and calves were divided into a treated and control group at 3-4 months following calving. In herd II, 1106 fall-calving cows and 172 calves were divided into a treated and control group at 3-4 months following calving. In both herds, cow liver and serum samples were collected and assayed for copper and iron. Cows in herd II were also examined for various reproductive parameters. Calf ADG was monitored over a 42-day treatment period in ...


Use Of Low-Level Grain Supplementation In An Intensive-Early Stocking Program: Influence On Daily Gain And Forage Production, R.C. Cochran, E.S. Vanzant, Robert T. Brandt Jr., Clenton E. Owensby, Lisa M. Auen Jan 1992

Use Of Low-Level Grain Supplementation In An Intensive-Early Stocking Program: Influence On Daily Gain And Forage Production, R.C. Cochran, E.S. Vanzant, Robert T. Brandt Jr., Clenton E. Owensby, Lisa M. Auen

Kansas Agricultural Experiment Station Research Reports

A 4-year experiment was conducted to evaluate the effect of increasing amounts of grain supplementation on steer gains and forage production in pastures managed under an intensive-early stocking system. Average daily gain tended to increase in direct proportion to increasing level of sorghum grain supplementation (2.19, 2.43 and 2.59 lb/day for the control, 2 and 4 lb/day supplement levels, respectively). The amount of grass remaining in the pastures at the end of the grazing season (approximately July 15) also increased in direct proportion to increasing sorghum grain supplementation. Forage remaining in the pastures at the ...


Effect Of Supplemental Grain Sorghum And Overseeding With Ladino Clover On Grazing And Subsequent Feedlot Performance Of Steers Early-Intensively Grazed On Acremonium Coenophialum - Infected Tall Fescue Pastures, K.P. Coffey, Joseph L. Moyer, Lyle W. Lomas, F.K. Brazle Jan 1992

Effect Of Supplemental Grain Sorghum And Overseeding With Ladino Clover On Grazing And Subsequent Feedlot Performance Of Steers Early-Intensively Grazed On Acremonium Coenophialum - Infected Tall Fescue Pastures, K.P. Coffey, Joseph L. Moyer, Lyle W. Lomas, F.K. Brazle

Kansas Agricultural Experiment Station Research Reports

Eighty mixed breed steers (avg. wt. 560 lb.) were used to evaluate the effect on grazing gain and subsequent feedlot performance of different management options for steers early-intensively grazing Acremonium coenophialuminfected tall fescue pastures. Steers were allotted to pastures of infected fescue pastures or infected fescue overseeded with ladino clover and received no supplement or were offered grain sorghum at .25% of their body weight. Neither supplementation nor overseeding affected grazing or feedlot performance. However, grain supplementation on overseeded pastures reduced subsequent feedlot feed efficiency (P<.10). These management options did not substantially affect grazing or subsequent feedlot performance by steers early-intensively grazing infected fescue pastures.


Synchronization Of Estrus In Yearling Beef Heifers With The Mga®/Prostaglandin System: I. Effect On Inducement Of Puberty And Conception Rates, L.R. Corah, J.R. Yaeger, J.C. Whittier, J.C. Meiske, D.J. Patterson, K. C. Olson Jan 1992

Synchronization Of Estrus In Yearling Beef Heifers With The Mga®/Prostaglandin System: I. Effect On Inducement Of Puberty And Conception Rates, L.R. Corah, J.R. Yaeger, J.C. Whittier, J.C. Meiske, D.J. Patterson, K. C. Olson

Kansas Agricultural Experiment Station Research Reports

We evaluated the estrous response and fertility of yearling beef heifers after treatment with melengestrol acetate (MGA) and prostaglandin F2" (PG). The 304 heifers, at three locations, were allotted to two treatments: nonsynchronized controls and those receiving .5 mg MGA per head daily for 14 days followed by a 25 mg PG injection 17 days after the end of MGA feeding (MGA/PG). Heifers in the control and MGA/PG groups were artificially inseminated 12 hours after observed estrus for 21 days or 6 days after PG, respectively. Conception rate at first service and overall pregnancy rate did not differ ...


Synchronization Of Estrus In Yearling Beef Heiferswith The Melengestrol Acetate®/Prostaglandin F2"System: Ii. Timed Insemination, Robert L. Larson, L.R. Corah, S.V. Viker Jan 1992

Synchronization Of Estrus In Yearling Beef Heiferswith The Melengestrol Acetate®/Prostaglandin F2"System: Ii. Timed Insemination, Robert L. Larson, L.R. Corah, S.V. Viker

Kansas Agricultural Experiment Station Research Reports

Inseminating heifers 72 hr after the PG injection in the melengestrol acetate/ prostaglandin F (MGA®/PG) estrous synchronization system, without regard to behavioral estrus, tended to improve (P=.2) the percent of heifers pregnant to artificial insemination (AI) when compared to synchronized heifers bred 12 h after they were first detected in estrus. In the timed inseminated treatment, heifers exhibiting behavioral estrus 48 to 72 h after PG tended to have a higher (P<.12) conception rate to AI than heifers showing estrus within 48 h after PG. For situations in which the number of heifers conceiving to AI is more economically important than first service conception rate, or when labor restrictions make estrous detection impossible, timed insemination at 72 h after PG in the MGA/PG system shows promise as a management option.


Synchronization Of Estrus In Yearling Beef Heifers With The Mga®/Prostaglandin F2Α System: Iii. Timed Insemination After 72 Hours Of Estrous Detection, Robert L. Larson, L.R. Corah Jan 1992

Synchronization Of Estrus In Yearling Beef Heifers With The Mga®/Prostaglandin F2Α System: Iii. Timed Insemination After 72 Hours Of Estrous Detection, Robert L. Larson, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

The percentage of heifers conceiving to artificial insemination (AI) following melengestrol acetate/prostaglandin F2"(MGA®/PG) estrous synchronization can be increased by mass insemination of all heifers not showing estrus by 72 h after PG. Inseminating at 12 h after estrus detection all heifers showing estrus within 72 h after PG; then inseminating those not detected in estrus by 72 h after PG as a group increased the proportion of heifers conceiving to AI by 10.8%.


Effects Of Niacin And Aspirin On Serum Prolactin And Body Temperature Of Heifers Fed Endophyteinfected Tall Fescue, Robert L. Larson, L.R. Corah Jan 1992

Effects Of Niacin And Aspirin On Serum Prolactin And Body Temperature Of Heifers Fed Endophyteinfected Tall Fescue, Robert L. Larson, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

Feeding niacin to cattle consuming endophyte (Acremonium coenophialum)-infected tall fescue elevated their serum prolactin concentrations to levels similar to those of heifers fed hay containing a low content of endophyte. Heifers fed high-endophyte hay, with or without aspirin, had lower serum prolactin concentrations than heifers fed low-endophyte fescue hay (P<.1). Compared to control cattle fed high-endophyte hay, neither niacin nor aspirin lowered morning or evening body temperatures during the period August 16 to September 4. Feeding aspirin did not lower body temperature or increase prolactin concentration in animals fed high-endophyte fescue forage. Some benefit was seen when niacin was added to the diet, as evidenced by higher (P<.01) prolactin concentrations; however body temperature was not lowered.


Effect Of Deworming With Ivomec® On Reproductive Performance Of Yearling Beef Heifers, Robert L. Larson, L.R. Corah, M.F. Spire, R.C. Cochran Jan 1992

Effect Of Deworming With Ivomec® On Reproductive Performance Of Yearling Beef Heifers, Robert L. Larson, L.R. Corah, M.F. Spire, R.C. Cochran

Kansas Agricultural Experiment Station Research Reports

To determine the effect of deworming fallborn yearling heifers on reproductive parameters, 78 heifers were allotted to a either Ivomec® or control treatments. The heifers were dewormed in June and October when they were approximately 7 and 11 months old, respectively. Ivomec effectively lowered fecal egg counts from treated heifers compared to controls. In these heifers that were maintained on a marginal plane of nutrition, deworming not only improved weight gains but also hastened onset of puberty and improved conception rate during a 60-day breeding season. The positive effect of Ivomec on these reproductive characteristics could not be explained by ...


Production And Marketing Factors Influencing Fed Cattle Prices, J. Mintert, R. Jones, F. Brazle, Ted C. Schroeder Jan 1992

Production And Marketing Factors Influencing Fed Cattle Prices, J. Mintert, R. Jones, F. Brazle, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

An analysis of more than 1400 pens of cattle marketed during 1990 examined the influence of several cattle traits and marketing factors on fed cattle prices. Cattle quality grade had an important impact on packer bids and feedyard asking prices. However, both feedyard asking and packer purchase prices reflected less than 25%, on average, of estimated wholesale value differentials. Other factors, including estimated dressing percentage, finish uniformity, cattle weight, number of head purchased, presence of heiferettes, and cattle type had significant price impacts. Feedyards generally received what they asked for cattle; 65% of the pens sold for their asking prices ...


Effect Of 1174® Silage Inoculant On The Fermentation Of Corn Silages, K.K. Bolsen, C. Lin, B.E. Brent, J.E. Bradford, A.M. Feyerherm Jan 1992

Effect Of 1174® Silage Inoculant On The Fermentation Of Corn Silages, K.K. Bolsen, C. Lin, B.E. Brent, J.E. Bradford, A.M. Feyerherm

Kansas Agricultural Experiment Station Research Reports

The effect of 1174® Silage Inoculant on the ensiling process was studied using three Pioneer corn hybrids. All hybrids fermented rapidly, and 1174 did not significantly influence any of the fermentation characteristics during the 120 days. The epiphytic lactic acid bacteria (LAB) counts on the chopped corn plants were high; 14 times greater than the numbers of LAB provided by the inoculant. Although during fermentation, statistically significant differences occurred among the hybrids for fermentation end-products, no observed trends suggested that hybrid effects were real.


Losses From Top Spoilage In Corn And Forage Sorghum Silages In Horizontal Silos, J.T. Dickerson, K.K. Bolsen, B.E. Brent, C. Lin Jan 1992

Losses From Top Spoilage In Corn And Forage Sorghum Silages In Horizontal Silos, J.T. Dickerson, K.K. Bolsen, B.E. Brent, C. Lin

Kansas Agricultural Experiment Station Research Reports

Corn and forage sorghum silages were stored in small (simulated), farm-scale, bunker silos for 180 days, and dry matter (DM) and organic matter (OM) losses; fermentation characteristics; and temperatures were measured at 10, 20, and 30 inches from the original silage surface. Sealing the exposed surface significantly increased DM and OM recoveries in both crops, regardless of depth. Immediate sealing preserved more DM and OM than delayed sealing, particularly at the 10-in. depth. The unsealed silages from both crops maintained dramatically higher temperatures within the top 3 ft. than sealed silages. As expected, the unsealed silages deteriorated completely at 10- ...


Beef Empire Carcass Merit Days Index System, T.H. Powell, S.D. Laudert, R.W. Lee, G. Seibert, John A. Unruh, Michael E. Dikeman Jan 1992

Beef Empire Carcass Merit Days Index System, T.H. Powell, S.D. Laudert, R.W. Lee, G. Seibert, John A. Unruh, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Kansas State University, in cooperation with the Beef Empire Days committee, developed a new beef carcass index system for 1991, incorporating yield and quality traits as indicators of carcass merit. Development of the system considered current industry and consumer demands in a critical evaluation of final carcass ranking. The index starts from 100 points and applies positive and negative adjustments for hot carcass weight; ribeye area; adjusted 12th rib fat thickness; percent kidney, pelvic, and heart fat; and quality grade. The index was first used in 1991.


Influence Of Level Of Supplemental Alfalfa Hay On The Performance Of Beef Cows Grazing Winter Bluestem Range, E.S. Vanzant, R.C. Cochran Jan 1992

Influence Of Level Of Supplemental Alfalfa Hay On The Performance Of Beef Cows Grazing Winter Bluestem Range, E.S. Vanzant, R.C. Cochran

Kansas Agricultural Experiment Station Research Reports

One hundred thirteen pregnant Hereford x Angus cows were used to study the effect of increasing levels of supplemental alfalfa hay on performance when grazing winter bluestem range. Although no differences were observed in reproductive performance, increasing the amount supplemental alfalfa from approximately .5% up to 1.0% of body weight resulted in increased weight gain and reduced condition loss in cows and increased weaning weight in calves. However, time spent grazing was significantly decreased in those groups receiving larger amounts of supplemental alfalfa.


Influence Of Frequency Of Energy Supplementation On Utilization Of Early-Summer, Tallgrass Prairie Forage, J.L. Beaty, R.C. Cochran, B.A. Lintzenich, E.S. Vanzant Jan 1992

Influence Of Frequency Of Energy Supplementation On Utilization Of Early-Summer, Tallgrass Prairie Forage, J.L. Beaty, R.C. Cochran, B.A. Lintzenich, E.S. Vanzant

Kansas Agricultural Experiment Station Research Reports

Fifteen ruminally cannulated beef steers were used in a pasture supplementation experiment to determine the effects of frequency of energy supplementation on intake and digestion of tallgrass prairie forage during early to mid-summer. Steers grazed a common pasture and were assigned to the following treatments: no supplement (control); 4 lb rolled sorghum grain/head/day; 9.3 lb grain/head/3 times weekly. Steers in the two supplemented groups consumed the same amount of sorghum grain/head/week. In general, supplementation was not harmful (P =.17) to forage intake. However, providing supplement 3 times weekly tended (P =.11) to depress ...


Influence Of Limited Creep Feeding On Pre- And Post-Weaning Performance Of Spring Born Calves, F.K. Brazle, Gerry L. Kuhl, C.E. Binns, K.O. Zoellner, L.R. Corah, R.R. Schalles Jan 1992

Influence Of Limited Creep Feeding On Pre- And Post-Weaning Performance Of Spring Born Calves, F.K. Brazle, Gerry L. Kuhl, C.E. Binns, K.O. Zoellner, L.R. Corah, R.R. Schalles

Kansas Agricultural Experiment Station Research Reports

Spring-born suckling beef calves were offered salt-limited creep feeds containing either high protein, high energy, or energy plus Bovatec® from August 15 to October 15 in a 3- year study. Creep feeding improved (P<.01) daily gain over controls, but no differences were attributable to creep composition. Daily creep feed consumption was somewhat less for the protein fed group, resulting in improved feed conversion compared to the energy-based supplement, with the energy plus Bovatec creep feed intermediate in efficiency. Creep feeding improved 53-day postweaning gains (P<.01). Overall, limited creep feeding boosted both pre- and postweaning performance, with no difference in gain among the three types of creep rations studied.


Performance And Carcass Characteristics Of Cull Beef Cows Implanted With Growth Promotants And Fed A High Concentrate Ration, C.D. Cranwell, D.D. Simms, J.R. Brethour, John A. Unruh Jan 1992

Performance And Carcass Characteristics Of Cull Beef Cows Implanted With Growth Promotants And Fed A High Concentrate Ration, C.D. Cranwell, D.D. Simms, J.R. Brethour, John A. Unruh

Kansas Agricultural Experiment Station Research Reports

Open, cull beef cows fed a high concentrate ration for 28 or 56 days and implanted with Finaplix-H®, Synovex-H®, or both had improved gain and feed efficiency compared to controls (nonimplanted cows). Changes in ultrasound-measured backfat (12th rib) of implanted cows and controls were similar in both feeding periods. Marbling, fat color, and tenderness, as measured by Warner-Bratzler shear force, were not improved by feeding cows for 56 days compared to 28 days. However, lean color, dressing percent, and ribeye area were improved by feeding for 56 days. Numerical yield grade was lower (P<.05) in 28-day fed cows. Implanting with Synovex-H or Finaplix-H resulted in leaner carcasses with lower yield grades compared to controls. Ribeye area was increased by using Synovex-H compared to controls and Finaplix- H. These data indicate that the benefits in gain, feed efficiency, and carcass traits from implanting cull cows can be obtained by using either Synovex-H or Finaplix-H alone.


Comparison Of Feedlot And Carcass Characteristics Of Angus, Hereford, Brahman, Charolais, And Gelbvieh Crossbred Steers, D.T. Hickok, R.R. Schalles, D.E. Franke, Michael E. Dikeman Jan 1992

Comparison Of Feedlot And Carcass Characteristics Of Angus, Hereford, Brahman, Charolais, And Gelbvieh Crossbred Steers, D.T. Hickok, R.R. Schalles, D.E. Franke, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Feedlot performance of 207 steers with various percentages of Angus, Hereford, Charolais, Brahman, and Gelbvieh breeding were compared at a constant 1) days fed, 2) adjusted carcass backfat, and 3) slaughter weight. As the percentage of Angus, Hereford, or Brahman increased, growth rate decreased, whereas increasing the percentage of Charolais increased growth rate. Increasing the percentage of Gelbvieh increased weaning weight but had little effect on post-weaning gains. Increasing percentage of Charolais increased feed conversion efficiency, whereas the other breeds were similar, except that at a constant slaughter weight, greater percentage of Hereford improved feed conversion efficiency. Increasing the percentage ...


Evaluation Of Interseeded Grain Sorghum And Soybeans As A Silage Crop, L.H. Harbers, K.K. Bolsen, H. Hartadi Jan 1992

Evaluation Of Interseeded Grain Sorghum And Soybeans As A Silage Crop, L.H. Harbers, K.K. Bolsen, H. Hartadi

Kansas Agricultural Experiment Station Research Reports

Dry matter yield of grain sorghum alone averaged more than 1.0 ton per acre higher than that of intercropped grain sorghum-soybeans in both 1988 and 1989. All silage yields were lower in 1989 because of drought. Grain sorghum silage had less NDF and ADF, but intercropped silages had over 4 percentage units more crude protein. Digestibility coefficients for crude protein, NDF, and ADF tended to favor intercropped silages, but yearling steer performance favored grain sorghum silage. Studies over 4 years (1986 to 1989) suggest that intercropping might be more beneficial for dairy cattle producers than beef producers.


Epiphytic Lactic Acid Bacteria Succession During The Pre-Ensiling And Ensiling Periods Of Alfalfa And Corn, Chunjian Lin, B.E. Brent, K.K. Bolsen, Daniel Y.C. Fung Jan 1992

Epiphytic Lactic Acid Bacteria Succession During The Pre-Ensiling And Ensiling Periods Of Alfalfa And Corn, Chunjian Lin, B.E. Brent, K.K. Bolsen, Daniel Y.C. Fung

Kansas Agricultural Experiment Station Research Reports

Twenty three species and 306 strains of epiphytic lactic acid bacteria (LAB) were found for two cuttings of alfalfa, each harvested at three stages of maturity, and three whole-plant corn hybrids. Epiphytic LAB counts were low and variable on the standing crops, particularly on alfalfa. Wilting increased LAB numbers slightly for alfalfa, but the chopping process increased counts dramatically for both crops. Lactobacillus plantarum, Pediococcus pentosaceus, Enterococcus faecium, and E. faecalis were predominant on both standing crops. The changes in LAB caused by wilting or chopping were mainly proportional changes in the four dominant species. Once the crops were ensiled ...


Endotoxin, Ammonia, And Total And Respirable Dust In Swine Confinement Buildings: The Effect Of Recirculated Air And Respiratory Protective Masks, J A. Pickrell, A J. Heber, James P. Murphy, M M. May, D Nolan, F W. Oehme, D Schoneweis, J R. Gillespie, Steven C. Henry Jan 1992

Endotoxin, Ammonia, And Total And Respirable Dust In Swine Confinement Buildings: The Effect Of Recirculated Air And Respiratory Protective Masks, J A. Pickrell, A J. Heber, James P. Murphy, M M. May, D Nolan, F W. Oehme, D Schoneweis, J R. Gillespie, Steven C. Henry

Kansas Agricultural Experiment Station Research Reports

Caretakers and pigs in dusty environments with particles and toxic gases may sustain health consequences. We studied concentrations of ammonia, endotoxin, and total and respirable dust particles in four mechanically ventilated swine nurseries and two grower facilities using an ammonia sampler, filter, and British cyclone. In two of the nursery facilities, we determined the protection offered by respiratory masks that were mounted on glass funnels with filters or British cyclones and sampled for dust. In response to the increasing summer ventilation, large, nonrespirable particle concentrations in swine building atmospheres were reduced more completely by ventilation air movement than smaller respirable ...


Ksu Swine Enterprise Record Summary, Michael R. Langemeier, Robert D. Goodband, Michael D. Tokach Jan 1992

Ksu Swine Enterprise Record Summary, Michael R. Langemeier, Robert D. Goodband, Michael D. Tokach

Kansas Agricultural Experiment Station Research Reports

Approximately 35 swine operations are enrolled in the 1992 Kansas Swine Enterprise Record Program. This program evaluates physical and economic performance and is part of a cooperative record-keeping project with extension personnel and swine producers in Kansas, Nebraska, and South Dakota. Records are summarized every 6 months, and the corresponding data are pooled to form state and regional averages. This paper summarizes the data for 22 farrow-to-finish operations in Kansas that kept records during the first 6 months of 1992. Profit per cwt. of pork produced for these 22 producers averaged $1.13. Profits varied substantially between producers. Producers in ...