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Kansas Agricultural Experiment Station Research Reports

1986

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Articles 1 - 30 of 91

Full-Text Articles in Life Sciences

Replacement Heifers - Breeding Management, Edward P. Call Jan 1986

Replacement Heifers - Breeding Management, Edward P. Call

Kansas Agricultural Experiment Station Research Reports

Records are the backbone of any breeding program. Artificial insemination (AI) is essential to maximizing genetic gain and minimizing calving problems and breeding costs. In addition, AI allows controlled calving - calving at the dairyman's discretion - not Mother Nature's! Adequately grown heifers should be added to the breeding list during the 13th month of age and serviced to meet the herd's calving goal. Feeding and handling systems should not change during the month preceding and during the breeding period, in order to minimize stress on the reproductive system. Economic loss because of delayed calving beyond 24 months of ...


Introducing A Computer Feeding System At Various Lactational Stages For Dairy Cows, J.C. Kube, John E. Shirley, K.D. Frantz, Jeffrey S. Stevenson Jan 1986

Introducing A Computer Feeding System At Various Lactational Stages For Dairy Cows, J.C. Kube, John E. Shirley, K.D. Frantz, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Lactating dairy cows were introduced to a computer feeder in early (≤120 days in milk or D.I.M.), mid (120-220 D.I.M.), and late (>220 D.I.M.) lactation. Cows in the mid- and late-lactation groups adjusted quicker and exhibited a smaller decrease in production, relative to the early lactation group. Computer-controlled feeders are increasing in popularity nationwide and are creating some interest among dairy producers in the midwest. Computer-controlled feeders allow dairy producers with small to medium-sized herds to feed their cows according to production without dividing cows into groups or dispensing feed in the parlor. Many ...


Ruminal Metabolic Development In Conventionally Or Early Weaned Calves, K.L. Anderson, Tiruvoor G. Nagaraja, J.L. Morrill Jan 1986

Ruminal Metabolic Development In Conventionally Or Early Weaned Calves, K.L. Anderson, Tiruvoor G. Nagaraja, J.L. Morrill

Kansas Agricultural Experiment Station Research Reports

Accelerating the weaning age of calves appeared to increase their ruminal metabolic activity. This was indicated by the lower ruminal pH and increased, total volatile fatty acid concentration of calves weaned at 4 wk of age compared with those weaned at 6 wk of age.; Dairy Day, 1986, Kansas State University, Manhattan, KS, 1986;


Evaluation Of High-Energy Calf Starter For Early-Weaned Calves, W.H. Carinder, P.G. Reddy, J.L. Morrill Jan 1986

Evaluation Of High-Energy Calf Starter For Early-Weaned Calves, W.H. Carinder, P.G. Reddy, J.L. Morrill

Kansas Agricultural Experiment Station Research Reports

An experimental calf-starter diet containing roasted whole soybeans, buffer and dehydrated alfalfa pellets was compared with a conventional calf starter for young calves on an early-weaning program. Overall means for weight gains, dry feed consumption, and fecal scores were similar for the two treatments. However, calves fed the experimental calf starter showed a trend toward higher gains at 4 and 5 wk of age. More fat than necessary in the diet and feeding of prestarter until 8 wk of age may have precluded finding significant benefits with the experimental starter.; Dairy Day, 1986, Kansas State University, Manhattan, KS, 1986;


Effect Of Buffers And Supplemental Potassium In Diets Of Early-Weaned Calves, K.J. Jordan, J.L. Morrill, P.G. Reddy, James J. Higgins Jan 1986

Effect Of Buffers And Supplemental Potassium In Diets Of Early-Weaned Calves, K.J. Jordan, J.L. Morrill, P.G. Reddy, James J. Higgins

Kansas Agricultural Experiment Station Research Reports

Potassium chloride added to the prestarter and/or potassium bicarbonate added to the starter fed to early weaned calves helped maintain normal blood alkalinity and normal levels of blood gases, and resulted in a trend toward increased feed consumption. Potassium bicarbonate added to the starter tended to improve weight gains.; Dairy Day, 1986, Kansas State University, Manhattan, KS, 1986;


Milk Flavor Quality On The Farm, H.A. Roberts Jan 1986

Milk Flavor Quality On The Farm, H.A. Roberts

Kansas Agricultural Experiment Station Research Reports

Milk consumption is influenced by the quality and flavor of the milk a person drinks. Today the consumer evaluates milk solely on its taste and keeping quality. Since the flavor of milk cannot be improved after it leaves the dairy farm, it is of the utmost importance to produce milk with the best flavor quality possible. Milk is a highly perishable food and must be produced under conditions that will ensure keeping quality. Generally speaking, dairymen are doing a good job of producing high quality milk but we need to be aware that problems may occur with feeding, cow health ...


Ration Fiber Analysis, J.L. Morrill Jan 1986

Ration Fiber Analysis, J.L. Morrill

Kansas Agricultural Experiment Station Research Reports

For many years, fiber in dairy rations was measured and expressed as crude fiber. More recently acid detergent fiber (ADF) and neutral detergent fiber (NDF) have been used. The crude fiber (CF) determination uses acid and alkali treatment and is an attempt to simulate reactions within the digestive tract, whereas the newer techniques use detergents and attempt to divide the plant cells into their component parts. Thus, NDF is resistant to breakdown by a certain detergent in neutral solution and represents the structural part of the cell, the cell wall. Acid detergent fiber is resistant to breakdown by a certain ...


Field Applications Of Exogenous Hormones- Gonadotropin And Prostaglandin, Edward P. Call Jan 1986

Field Applications Of Exogenous Hormones- Gonadotropin And Prostaglandin, Edward P. Call

Kansas Agricultural Experiment Station Research Reports

prostaglandin F2α(PGF) and gonadotropin-releasing hormone (GnRH) have provided new dimensions in resolving certain reproductive maladies. Effective when used properly, these hormones have the advantage of mimicking the physiological activity of natural hormones without the negative, overriding effects of synthetic products. Effective use of the hormones requires accurate diagnoses. Moreover, side effects are nil except when PGF is mistakenly administered to pregnant animals. The effect of PGF in humans must be recognized. Current research under way gives promise that GnRH may have beneficial effects in the early postpartum cow suffering from problems around the time of calving.; Dairy Day, 1986 ...


Effects Of Compudose® Implants From Birth To Slaughter On Carcass And Meat Traits Of Young Bulls And Steers, T.D. Hopkins, Michael E. Dikeman Jan 1986

Effects Of Compudose® Implants From Birth To Slaughter On Carcass And Meat Traits Of Young Bulls And Steers, T.D. Hopkins, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Implanting young bulls with Compudose® three times from birth to slaughter resulted in performance similar to that of nonimplanted bulls, but decreased masculinity development. Implanted bulls tended to have higher marbling scores, more tender meat, more youthful carcasses, and lighter lean color than nonimplanted bulls. Although both implanted and nonimplanted bulls were more efficient and gained faster in the feedlot than implanted steers, the steers showed very little carcass masculinity and had finer-textured lean. Implanted steers had more youthful carcasses and lower Warner-Bratzler shear values than nonimplanted bulls. However, nonimplanted bulls grew faster, were more efficient, had larger ribeyes and ...


Survey Of Northwest Kansas Cow-Calf Producers, D.D. Simms, G. Boyd, L.R. Corah Jan 1986

Survey Of Northwest Kansas Cow-Calf Producers, D.D. Simms, G. Boyd, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

An in-depth survey of reproductive performance and management practice was conducted on 160 cow/calf operations in Northwest Kansas.


Reproductive Performance Of Angus X Hereford And Brahman X Hereford Heifers Fed To Prebeeding Target Weights, D.J. Patterson, L.R. Corah, D.D. Simms, J.R. Brethour, W.R. Negus Jan 1986

Reproductive Performance Of Angus X Hereford And Brahman X Hereford Heifers Fed To Prebeeding Target Weights, D.J. Patterson, L.R. Corah, D.D. Simms, J.R. Brethour, W.R. Negus

Kansas Agricultural Experiment Station Research Reports

Heifer development as effected by nutrition was evaluated in 148 F Angus x Hereford (A x H) and 148 F Brahman x Hereford (B x H) heifers. Heifers within each breed cross were assigned to one of two energy levels and weight groups. Heifers on the low and high energy-level diets were fed to reach 55 or 65%, respectively, of their projected mature body weights by the start of spring breeding. A higher (P<.05) percentage of A x H heifers had reached puberty by the start of spring breeding; however, their average age at puberty was greater (P<.05) than that of B x H heifers. Weight at puberty, for heifers that cycled prior to the start of spring breeding, did not differ between breed groups. Weight of heifers at puberty was greater with the high-energy than with the low-energy diets. Prebreeding body condition scores of heifers on the two energy levels differed (P<.05) more among the A x H females. The A x H heifers had higher (P<.05) fall pregnancy rates than the B x H heifers (89.2 vs 71.9%). Energy level has no significant effect on fall pregnancy rate of A x H heifers, but B x H heifers on the high-energy level had a higher (P<.05) pregnancy rate than those on the low-energy diet.


Effect Of Single Ralgro® Implant During The Suckling Period On Reproductive Performance Of Replacement Heifers, T.B. Goehring, L.R. Corah, D.D. Simms Jan 1986

Effect Of Single Ralgro® Implant During The Suckling Period On Reproductive Performance Of Replacement Heifers, T.B. Goehring, L.R. Corah, D.D. Simms

Kansas Agricultural Experiment Station Research Reports

One hundred and seven spring-born, crossbred heifers were used to determine the effect of a single Ralgro® implant on their reproductive performance. Three implant treatments were used: 1) Non-implanted controls, 2)36 mg Ralgro® at birth, or 3) 36 mg Ralgro® at 2 to 3 months of age. Heifers implanted at birth had significantly lower first service conception rates and overall pregnancy rules than non-implanted controls or those implanted at 2 to 3 months of age. Pelvic areas of yearling were increased by implanting at birth or 2 to 3 months of age. Age at puberty and the percentage of ...


Aborting Feedlot Heifers With Alfavet® Or Bovilene®, S. Laudert, G. Boyd, Gerry L. Kuhl Jan 1986

Aborting Feedlot Heifers With Alfavet® Or Bovilene®, S. Laudert, G. Boyd, Gerry L. Kuhl

Kansas Agricultural Experiment Station Research Reports

Alfavet® (alfaprostol), an experimental prostaglandin analog for inducing abortion in feedlot heifers, was evaluated for efficacy. Abortion was induced within 8 days following injection of 5 mg alfaprostol in 45 of 51 heifers (88.2%) ranging from 40 to 150 days in gestation. Bovilene® (fenprostalene), injected at 1 mg per head resulted in abortion in 45 of 49 heifers (91.8%) of similar pregnancy status. Both products were 95-100% effective from 40 to 120 days of pregnancy, but only 75% effective from 121 to 150 days.


Effect Of Various Dosages Of Ralgro® In The Suckling Period On Weight Gain During The Growing Period, D.D. Simms, G. Boyd, James J. Higgins Jan 1986

Effect Of Various Dosages Of Ralgro® In The Suckling Period On Weight Gain During The Growing Period, D.D. Simms, G. Boyd, James J. Higgins

Kansas Agricultural Experiment Station Research Reports

We studied how implanting with various dosages of Ralgro® during the suckling period affected gains in the growing period. Preweaning performance was reported in the 1985 Cattlemen's Day Report. All calves, regardless of suckling period treatment, received 36 mg Ralgro® at the start of the growing period. Average daily gains during the growing period were similar for all treatments. Consequently, the added weight obtained from the suckling-period implants was still present at the end of the growing period.


Comparison Of 36 Mg And 72 Mg Ralgro® For Suckling Steer Calves, D.D. Simms Jan 1986

Comparison Of 36 Mg And 72 Mg Ralgro® For Suckling Steer Calves, D.D. Simms

Kansas Agricultural Experiment Station Research Reports

In a study in which 525 Simmental-cross steer calves were assigned to five implant treatments in four trials, 72 mg Ralgro® implants failed to increase performance significantly over' conventional 36 mg implants.


Beef Cattle Systems Analysis, R.R. Schalles Jan 1986

Beef Cattle Systems Analysis, R.R. Schalles

Kansas Agricultural Experiment Station Research Reports

For cattle producers to stay in business, they must apply the business management techniques used by sophisticated non-agricultural enterprises. Among these techniques is systems analysis, in which formulas representing interrelationships between various inputs are built into a computer program. The program simulates expected results, based on available information.


The Effect Of Gnrh On Pregnancy Rates In Estrus-Synchronized Beef Heifers, M. Ferguson, L. Corah Jan 1986

The Effect Of Gnrh On Pregnancy Rates In Estrus-Synchronized Beef Heifers, M. Ferguson, L. Corah

Kansas Agricultural Experiment Station Research Reports

Injecting 100 mcg of GnRH into cycling heifers at artificial insemination following estrus synchronization with either prostaglandin or Syncro-Mate-B® did not improve first service conception rate. However, GnRH improved first service conception in Syncro-Mate-B®-treated heifers that did not exhibit estrus prior to breeding and were bred by appointment.


Bacteriological And Histopathological Investigations Of Liver Abscesses, K.F. Lechtenberg, H.W. Leipold, Tiruvoor G. Nagaraja Jan 1986

Bacteriological And Histopathological Investigations Of Liver Abscesses, K.F. Lechtenberg, H.W. Leipold, Tiruvoor G. Nagaraja

Kansas Agricultural Experiment Station Research Reports

Fusobacterium necrophorum was the predominant bacterial isolate from 49 liver abscesses. Biotype A tended to occur in pure infections and produced a more severe tissue reaction than biotype B, which tended to occur as a mixed infection.


Adding Fat And/Or Sodium Bicarbonate To Steer Finishing Rations That Contain Wheat, J.R. Brethour, B. Lee, Jack G. Riley Jan 1986

Adding Fat And/Or Sodium Bicarbonate To Steer Finishing Rations That Contain Wheat, J.R. Brethour, B. Lee, Jack G. Riley

Kansas Agricultural Experiment Station Research Reports

Adding .6 pound fat or .22 pound sodium bicarbonate (soda) to finishing rations containing rolled wheat significantly improved performance and appeared to increase the substitution value of wheat. Both fat and soda increased feed intake. The improved gains from adding fat corresponded to increased energy intake. However, soda seemed to enhance nutrient utilization. There was more response to fat when we fed 100 percent vs. 50 percent wheat, but feeding 100 percent wheat depressed performance, with or without fat, to unsatisfactory levels.


Influence Of Ionophore Addition To High-Grain Diets On Net Nutrient Absorption, D.L. Harmon, T.B. Avery Jan 1986

Influence Of Ionophore Addition To High-Grain Diets On Net Nutrient Absorption, D.L. Harmon, T.B. Avery

Kansas Agricultural Experiment Station Research Reports

Adding ionophores to a high grain diet increased glucose absorption and decreased the transport of urea back into the gut. These changes are consistent with the antibiotic effects of these compounds. Decreased microbial activity in the gut and shifts in the pattern of absorbed nutrients may help explain the improvements in feed efficiency seen with ionophore addition.


Effect Of Maturity At Harvest On Yield, Composition, And Feeding Value Of Hybrid Forage Sorghum Silages, J. Dickerson, K. Bolsen, S. Hamma, J. Hoover Jan 1986

Effect Of Maturity At Harvest On Yield, Composition, And Feeding Value Of Hybrid Forage Sorghum Silages, J. Dickerson, K. Bolsen, S. Hamma, J. Hoover

Kansas Agricultural Experiment Station Research Reports

Results from three trials showed the diversity among forage sorghum hybrids for both agronomic and nutritive characteristics. Later maturing and nonheading hybrids produced silages with low dry matter (DM) contents, low pH values, high levels of fermentation acids, and low voluntary intakes. Earlier maturing and moderate grain-producing hybrids, but their silages had high DM contents and higher voluntary intakes. Stage of maturity at harvest had surprisingly little influence on silage chemical composition, intake, or digestibility.


Additive-Treated Corn Silage For Growing Cattle, K. Bolsen, R. Smith, H. Ilg, D. Axe Jan 1986

Additive-Treated Corn Silage For Growing Cattle, K. Bolsen, R. Smith, H. Ilg, D. Axe

Kansas Agricultural Experiment Station Research Reports

The response of corn silage to the additive, Silo-Best Soluble®, was not consistent for the farm silo criteria measured. Ensiling temperatures and chemical compositions were similar for control and treated silages, except for ethanol, which was lower in the treated silage. Dry matter recovery favored the treated silage in both the top and bottom halves of the silos and in buried bags. Although daily gains were similar for calves fed control and treated silages, feed conversion was slightly better for those fed control silage.


Effect Of Sodium Bicarbonate On Gains Of Stocker Cattle Fed Grain On Tall Fescue Pastures, F. Brazle Jan 1986

Effect Of Sodium Bicarbonate On Gains Of Stocker Cattle Fed Grain On Tall Fescue Pastures, F. Brazle

Kansas Agricultural Experiment Station Research Reports

Adding sodium bicarbonate to the grain supplement of steers grazing lush, low endophyte, tall fescue pasture had no effect on cattle performance.


Effect Of Rotational Grazing By Yearlings On Early-Intensive, Double-Stocked, Native Grass, F. Brazle, Gerry L. Kuhl Jan 1986

Effect Of Rotational Grazing By Yearlings On Early-Intensive, Double-Stocked, Native Grass, F. Brazle, Gerry L. Kuhl

Kansas Agricultural Experiment Station Research Reports

Continuous, early-intensive (double-stocked) grazing vs. early-intensive grazing using a two-pasture, 16 to 18-day rotation were compared in three experiments. No significant differences were found (P>.15) in daily gains of stockers or forage remaining after the 2 ½ month grazing season


Effect Of Salinomycin On Performance Of Grazing Stocker Heifers, Lyle W. Lomas Jan 1986

Effect Of Salinomycin On Performance Of Grazing Stocker Heifers, Lyle W. Lomas

Kansas Agricultural Experiment Station Research Reports

The effect of feeding 0, 25, 50, 100, or 150 mg of salinomycin per head daily on performance of stocker heifers grazing smooth bromegrass pasture was evaluated in a 126-day trial. Feeding 100 or 150 mg of salinomycin per head daily produced the fastest gain.


Evaluation Of An Experimental Silage Inoculant In Laboratory And Farm Silos Using Alfalfa And Forage Sorghum, K. Bolsen, R. Smith, H. Ilg, Daniel Y.C. Fung Jan 1986

Evaluation Of An Experimental Silage Inoculant In Laboratory And Farm Silos Using Alfalfa And Forage Sorghum, K. Bolsen, R. Smith, H. Ilg, Daniel Y.C. Fung

Kansas Agricultural Experiment Station Research Reports

An experimental microbial inoculant dramatically increased the speed of pH drop and rate and amount of lactic acid production in alfalfa at both 60 and 90 F storage temperatures. In two trials with forage sorghums, the inoculant did not affect the silage fermentation at 60 F but it did produce small improvements in silages at 90 F. In general, sorghum silages at 60 F fermented slower and had high pH values, lower lactic acid, and higher acetic acid contents than silages at 90 F. The response to the additive in a farm silo trial was not consistent for the criteria ...


Growth, Carcass And Boar-Odor Traits In Male Pigs Fed Altrenogest, Jeffrey S. Stevenson, E F. Kluber Iii, J Ernest Minton, Duane L. Davis, Melvin C. Hunt, D S. Pollmann, Jim L. Nelssen Jan 1986

Growth, Carcass And Boar-Odor Traits In Male Pigs Fed Altrenogest, Jeffrey S. Stevenson, E F. Kluber Iii, J Ernest Minton, Duane L. Davis, Melvin C. Hunt, D S. Pollmann, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to examine the effects of a synthetic progestogen (altrenogest) on growth and carcass characteristics of boars. Altrenogest inhibited both the growth of the testes and the pubertal rise in testosterone that is associated with maleness. Growth rate, feed intake, and feed/gain were unaffected by feeding altrenogest in both experiments; however, in Exp. 2. growth rate and feed intake during the 4-wk withdrawal of altrenogest were less than those in the control boar or barrow groups. These changes appeared to be related to marked mounting activity of boars beginning 5 days after withdrawal of altrenogest from ...


The Effects Of Barley Particle Size On Finishing-Pig Performance, Robert D. Goodband, Robert H. Hines Jan 1986

The Effects Of Barley Particle Size On Finishing-Pig Performance, Robert D. Goodband, Robert H. Hines

Kansas Agricultural Experiment Station Research Reports

Two trials utilizing 280 finishing pigs were conducted to evaluate the effects of barley particle size on finishing-pig performance. In Experiment 1, pigs fed barley ground through a hammermill with a 1/8-in screen were not different in average daily gain (ADG) or feed efficiency (F/G) from pigs fed a milo-based diet ground through a 3/16-in screen. Pigs fed either 3/16 or 1/4-in ground barley grew slower and were less efficient (P<.02) than those fed either the milo or finely ground barley diet. Experiment 2 was conducted in a similar manner, with the exception that mill run barley was used instead of a specific variety. In Experiment 2, ADG and average daily feed intake (ADFI) were not different between dietary treatments. This response resulted in a trial x treatment interaction for these criteria. Results for feed efficiency were similar to those in Experiment 1; pigs fed 3/16 or 1/4-in ground barley diets were less efficient (P<.02) than those fed l/8-in ground barley or 3/16-in ground milo. These results suggest that the variety of barley is an important criteria in determining feeding value for finishing-pigs, and that reducing particle size of the diet by fine grinding improves feed efficiency.; Swine Day, Manhattan, KS, November 20, 1986


Lean Value Marketing Programs, P F. Maxson Jan 1986

Lean Value Marketing Programs, P F. Maxson

Kansas Agricultural Experiment Station Research Reports

Recent promotion of the National Pork Producers Lean Guide to Pork Value has focused attention on providing pork producers with an economic incentive to raise lean, meaty hogs. The packing industry version of this value-based idea is generally termed a grade and yield program. While each individual packing plant may have its own grade and yield program, several factors need to be considered when marketing hogs grade and yield, regardless of the packing plant. The preferred weight range for a packing plants grade and yield program must be known. Packing plants available to Kansas usually range from 210-240 lb or ...


Effect Of A Select Menhaden Fish Meal In Starter Diets For Pigs, G R. Stoner, G L. Allee, M E. Johnston, Jim L. Nelssen Jan 1986

Effect Of A Select Menhaden Fish Meal In Starter Diets For Pigs, G R. Stoner, G L. Allee, M E. Johnston, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

A growth study was conducted to evaluate the effect of a select menhaden fish meal (SMFM) as a protein source in starter diets for pigs. A total of 150, 3-week old weaned pigs were utilized. Diets were formulated by replacing soy protein with protein from SMFM. The replacement of soy protein with SMFM elicited a quadratic response in average daily gain (ADG) and average daily feed intake (ADFI) by the end of week 5. Inclusion of SMFM at 8% yielded the maximum observed ADG, whereas ADFI was maximized with the 12% SMFM diet. Addition of SMFM did not affect feed ...