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1989

Other Animal Sciences

Kansas State University Libraries

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Full-Text Articles in Life Sciences

Nutritional Considerations For Improved Lean Value (1989), Jim L. Nelssen Jan 1989

Nutritional Considerations For Improved Lean Value (1989), Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

The swine industry is in a transitional period as it gears up to produce the lean meat required by the consumer. In fact, pork processors arc increasing the production of lean products (boneless loins, 95% fat-free hams) because consumers are willing to pay premiums for low-fat products. New methods of measuring the amount of lean pork (fat-a-meter, etc.) are being developed rapidly, in order to allow the packer to offer price differentials for lean compared to fat pigs. Pork producers, in my opinion, will adjust production systems to meet consumer demands for lean pork when monetary differentials are offered by …

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Effect Of Diet Particle Size On Utilization Of Sunflower Oil Seeds In Nursery Pig Diets (1989), G E. Fitzner, T L. Weeden, Robert H. Hines, Robert D. Goodband Jan 1989

Effect Of Diet Particle Size On Utilization Of Sunflower Oil Seeds In Nursery Pig Diets (1989), G E. Fitzner, T L. Weeden, Robert H. Hines, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

One hundred ninety-two weanling pigs were fed diets containing 15 or 25% sunflower oil seeds that were ground using a hammermill equipped with either a 1/8 or 3/16 in. screen. Average daily gain (ADG) of pigs fed the 25% sunflower seed diet ground through a 1/8 in. screen was similar to ADG of pigs fed the control diet or that with 15% sunflower seeds, although there was a reduction in ADFI. This indicates that finely ground sunflower seeds can be utilized in nursery pig diets up to 25% with no impairment in performance.; Swine Day, Manhattan, KS, November 16, 1989

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Fecal Thiaminase In Feedlot Cattle, T.D. Hays, B.E. Brent Jan 1989

Fecal Thiaminase In Feedlot Cattle, T.D. Hays, B.E. Brent

Kansas Agricultural Experiment Station Research Reports

Fecal thiaminase was measured on 152 feedlot cattle at three locations and on a variety of rations. No animals showed signs of polioencephalomalacia. Thiaminase activities ranged from 0.6 to 430 µmol thiamin destroyed per minute per liter of feces (µmol/min/l). Eighty-two percent of the thiaminase activities were below 20 µmol/min/l, and only 3 percent were less than 2 µmol/min/l. High levels of fecal thiaminase were apparently not related to ration. Thiaminase was detected in all animals studied, but one location had only minimal levels. When high levels of thiaminase were found, the samples were re-assayedt and the enzyme was confirmed …

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Splay-Foot In Cattle, R.R. Schalles, R.W. Markham, H.W. Leipold, M.F. Spire Jan 1989

Splay-Foot In Cattle, R.R. Schalles, R.W. Markham, H.W. Leipold, M.F. Spire

Kansas Agricultural Experiment Station Research Reports

Angular limb deformity, observed in several breeds of cattle, results in a knock-kneed and splay-footed condition in the front legs. This study shows that angular limb deformity is a congenital structural defect, inherited as a simple, autosomal, recessive trait.

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Visual Body Condition Score Of Cows, C.K. Clarke, R.R. Schalles Jan 1989

Visual Body Condition Score Of Cows, C.K. Clarke, R.R. Schalles

Kansas Agricultural Experiment Station Research Reports

Condition scores are often used to describe the "fleshiness" of cows. These scores range from 1 (extremely emaciated) to 9 (extremely fat).

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Influence Of Level Of Grain Supplementation On The Performance Of Intensive-Early Stocked Steers, R.C. Cochran, E.S. Vanzant, Clenton E. Owensby Jan 1989

Influence Of Level Of Grain Supplementation On The Performance Of Intensive-Early Stocked Steers, R.C. Cochran, E.S. Vanzant, Clenton E. Owensby

Kansas Agricultural Experiment Station Research Reports

Two levels of sorghum grain supplementation (2 or 4 lb/day) for"¢steers in an intensive-early stocking program tended to increase average daily gain in direct proportion to increasing supplement level (2.7 and 2.9 lb/day. respectively, compared to 2.5 lb with no supplement). Similarly, grass remaining in the pastures after the cattle were removed on July 15, and at the end of the growing season on October 1, was greater when cattle were supplemented.

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Influence Of Rumen Bypass Fat In Cattle Supplements On Forage Utilization, R.B. Hightshoe, R.C. Cochran, L.R. Corah, D.L. Harmon, E.S. Vanzant Jan 1989

Influence Of Rumen Bypass Fat In Cattle Supplements On Forage Utilization, R.B. Hightshoe, R.C. Cochran, L.R. Corah, D.L. Harmon, E.S. Vanzant

Kansas Agricultural Experiment Station Research Reports

Incorporation of rumen bypass fat into a supplement to be fed with low quality forage did not affect total dry matter digestibility or ruminal dry matter fill. Similarly, no difference in digestibility was observed among types (animal vs. plant) or levels (low vs. high) of lipids used in this study. Rumen bypass fat apparently avoids the negative impact on forage utilization seen with conventional fats.

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Effect Of Soybean Processing On Starter Pig Performance And Nutrient Digestibility (1989), D F. Li, R C. Thaler, Jim L. Nelssen, Keith C. Behnke Jan 1989

Effect Of Soybean Processing On Starter Pig Performance And Nutrient Digestibility (1989), D F. Li, R C. Thaler, Jim L. Nelssen, Keith C. Behnke

Kansas Agricultural Experiment Station Research Reports

One hundred sixty-eight pigs were used to evaluate the effect of soybean processing on starter pig performance and nutrient digestibility. Soybean products tested were commercial soybean meal, full-fat roasted soybeans from either a Roast-A-Tron or Rickles Roaster, extruded soybeans, and steam-flaked soybeans. Pigs fed soybeans from the Rickles Roaster had lower average daily gain, average daily feed intake, and feed efficiency than pigs fed the other soybean products. Rickles soybeans had lower apparent digestibility of nitrogen, dry matter, total fat, and long chain fatty acids than the other treatments. Pigs fed steam-flaked soybeans had the second lowest growth rate. These …

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Effects Of Winter Herbage Removal On Flint Hills Rangeland, Lisa M. Auen, Clenton E. Owensby Jan 1989

Effects Of Winter Herbage Removal On Flint Hills Rangeland, Lisa M. Auen, Clenton E. Owensby

Kansas Agricultural Experiment Station Research Reports

Intensive-early stocking (lES) in the Kansas Flint Hills has greatly increased livestock production efficiency. The potential for grazing of regrowth on IES pastures the following winter was studied by mowing different plots on a monthly basis from October to April, 19831985. Winter herbage removal had no significant effect on herbage production in the following seasons or on the total nonstructural carbohydrates (TNC) of big bluestem (Andropogon gerardii) rhizomes. Since there was no reduction in herbage yield for any mowing date, cattle producers can apparently restock IES pastures after October 1.

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Evaluation Of Interseeded Grain Sorghum And Soybeans As A Silage Crop, S.H.M. Esmail, H. Hartadi, L.H. Harbers, John E. Shirley, J.D. Hoover, S. Azimi, L.W. Pfaff, K.K. Bolsen Jan 1989

Evaluation Of Interseeded Grain Sorghum And Soybeans As A Silage Crop, S.H.M. Esmail, H. Hartadi, L.H. Harbers, John E. Shirley, J.D. Hoover, S. Azimi, L.W. Pfaff, K.K. Bolsen

Kansas Agricultural Experiment Station Research Reports

Interseeded grain sorghum and soybeans have been evaluated as a silage crop over a 3year period. In the first 2 years, maximum dry matter (DM) yields occurred at the late-dough stage of the grain sorghum, and interseeded silages had higher crude protein (CP) and acid detergent fiber contents than non-interseeded late-dough stage, grain sorghum control silages. In year 2, seeding grain sorghum and soybeans in alternating IS-inch rows increased DM yield, CP content, and the proportion of soybean plants in the mixture compared to drilled (6-inch spacing) interseeding. Digestibilities of most nutrients were similar in all silages; however, cattle fed …

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Effects Of Lecithin And Lysolecithin On The Digestibility Of Fat Sources In Diets For Weanling Pigs (1989), D B. Jones, Jim L. Nelssen, Robert H. Hines, Joe D. Hancock Jan 1989

Effects Of Lecithin And Lysolecithin On The Digestibility Of Fat Sources In Diets For Weanling Pigs (1989), D B. Jones, Jim L. Nelssen, Robert H. Hines, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

Ninety-six pigs (17 d of age and 11.6 lb initial wt) were utilized to determine if adding emulsifiers (lecithin and lysolecithin) to diets containing 10% added fat would affect nutrient digestibility. Fat sources were: 1) soybean oil, 2) tallow, 3) lard, and 4) coconut oil. Lecithin and lysolecithin were added as 10% of the added fat. Pigs were limit fed using the following equation: daily feed allowance = .05 x body wt^9. After a 7-d adjustment period, feces were collected for 4 d, pooled, and analyzed for fat, nitrogen, and energy content. Soybean oil and coconut oil were more digestible …

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Effect Of Replacing Milk Products With A Soybean Protein Isolate Milk Replacer In Diets For Nursery Pigs (1989), D B. Jones, D F. Li, Jim L. Nelssen, Joe D. Hancock Jan 1989

Effect Of Replacing Milk Products With A Soybean Protein Isolate Milk Replacer In Diets For Nursery Pigs (1989), D B. Jones, D F. Li, Jim L. Nelssen, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

One hundred eighty pigs (21 d of age and averaging 14.5 lb) were used to determine if a milk replacer containing soybean protein isolate can replace dried skim milk and dried whey in a high nutrient density starter diet. Pigs received pelleted feeds that were: 1) corn-soybean meal control; 2) a high nutrient density diet (HNDD) containing 20% dried skim milk and 20% dried whey; 3 and 4) diet 2 with milk rcplacer substituted for 50% and 100% of the milk products; 5) corn-milk replacer; 6) corn-milk products. Average daily gain (ADG), average daily feed intake (ADFI), feed conversion (F/G), …

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Hydrocortisone Acetate-Injected Piglets Have A Larger Pancreas And Greater Mucosal Weight And Lactase, Maltase, And Sucrose Activities In The Duodenum (1989), K K. Kreikemeier, D L. Harmon, Jim L. Nelssen Jan 1989

Hydrocortisone Acetate-Injected Piglets Have A Larger Pancreas And Greater Mucosal Weight And Lactase, Maltase, And Sucrose Activities In The Duodenum (1989), K K. Kreikemeier, D L. Harmon, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

One litter of 12 piglets was used in a completely random design to evaluate the effects of hydrocortisone acetate injections on organ weight and carbohydrase activities. Dams' milk was the only food source available to the piglets. When they were 7 d old, six pigs were injected with hydrocortisone acetate (50 mg/kg BW; 50 mg/ml) and six others were injected with an equal volume of saline (1 ml/kg BW). When the pigs were 14 d old, tissues were collected, weighed, and analyzed for carbohydrase activities. Hydrocortisone acetate injection had no effect on pig daily gain (d 7 to 14), liver …

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Influence Of Milk Levels Of Beef Cows On Returns: A Simulation Approach, R.R. Schalles, K.O. Zoellner, L.S. Clarke Jan 1989

Influence Of Milk Levels Of Beef Cows On Returns: A Simulation Approach, R.R. Schalles, K.O. Zoellner, L.S. Clarke

Kansas Agricultural Experiment Station Research Reports

Results of four simulated production systems indicated that high levels of milk produced calves that were heavier at weaning, primarily because of an increase in body fat. High levels of milk production, however, were a disadvantage when calves went directly to the feedlot. With slow-growing calves, the fat either had to be depleted postweaning, or the calves had to be slaughtered at less-than-desirable weights in order to maintain desirable carcass fat. High milk intake is more tolerable for calves with fast growth rates, whereas low milk intake is a an economic necessity for calves with slow growth rates. The moderate …

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Influence Of Limited-Creep Feeding On Pre- And Postweaning Performance Of Spring-Born Calves, C.E. Binns, F.K. Brazle, Gerry L. Kuhl, D.D. Simms, K.O. Zoellner, L.R. Corah Jan 1989

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

Kansas Agricultural Experiment Station Research Reports

Limit-feeding a high protein creep (36% CP) and a high energy creep (16% CP) was compared with no supplementation in a 61-day preweaning trial. Salt was used to limit daily creep intake to 1.5 to 2.0 lb per head. Calves given the limited energy and protein creep feeds outgained (P<.01) the unsupplemented calves by 0.2 lb and 0.3 lb, respectively. Conversion of creep feed consumed to extra gain was 6.7 and 5.3 for the energy and protein creep-fed calves, respectively (salt included). Trucking shrink of the noncreep-fed calves on the day of weaning and shipping was 4.9 lb and 7.0 lb less (P<.05) than that of the energy and protein creep-fed calves, respectively. Postweaning daily gains of the energy creep-fed calves was higher than those of both the protein creep-fed calves (P=.09) and the noncreep-fed calves (P<.01) by 0.3 lb and 0.5 lb, respectively. The energy creep-fed calves consumed more (P<.05) daily dry matter than the protein creep-fed and unsupplemented calves. Little difference was observed in postweaning feed conversion among creep treatments.

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The Effect Of Dietary Energy Density And Porcine Somatotropin On Apparent Digestibility And Retention Of Nutrients In Finishing Swine (1989), G R. Stoner, B R. Schricker, Jim L. Nelssen, Robert D. Goodband, Robert H. Hines Jan 1989

The Effect Of Dietary Energy Density And Porcine Somatotropin On Apparent Digestibility And Retention Of Nutrients In Finishing Swine (1989), G R. Stoner, B R. Schricker, Jim L. Nelssen, Robert D. Goodband, Robert H. Hines

Kansas Agricultural Experiment Station Research Reports

Sixteen barrows were used in a metabolism study (avg wt of 101.2 lb) to evaluate the effect of dietary energy density and porcine somatotropin (pST) on apparent digestibility and retention of nutrients in finishing pigs. This study was designed as a split-plot with 4 mg pST/d or placebo injection as whole plot treatments and four dietary energy densities (1.37, 1.48, 1.60, and 1.71 Meal ME/lb) and period as the subplot treatments. Increasing dietary energy density increased apparent digestibility of dry matter, gross energy, and nitrogen, but had no effect on nitrogen retention. Porcine somatotropin administration had no effect on apparent …

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Porcine Somatotropin And Dietary Lysine Influence Bone Mineralization And Mechanical Properties In Finishing Swine (1989), B R. Schricker, Robert D. Goodband, Robert H. Hines, Jim L. Nelssen, Donald H. Kropf, Joe D. Hancock Jan 1989

Porcine Somatotropin And Dietary Lysine Influence Bone Mineralization And Mechanical Properties In Finishing Swine (1989), B R. Schricker, Robert D. Goodband, Robert H. Hines, Jim L. Nelssen, Donald H. Kropf, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

The femur, a rib, and third phalanx of the second digit from the front foot were collected from 108 barrows (initial wt = 125 lb) and analyzed to determine the effects of porcine somatotropin (pST) and dietary lysine on bone mineralization and mechanical properties. In Exp. 1, pigs were injected daily with 4 mg pST and fed diets containing .6, .8, 1.0, 1.2, or 1.4% lysine; 1.0% Ca; and .8% P. Control pigs (placebo injection) received the .6% lysine diet. Bone wall thickness (BWT) of the femur increased but ash content decreased as dietary lysine level increased. Stress values and …

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Application Of Technology For Maximizing Lean Growth (1989), Robert D. Goodband Jan 1989

Application Of Technology For Maximizing Lean Growth (1989), Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

The swine industry is at a crossroads that either mayor may not change the way we produce pork in the future. As we head into the 90's, we are entering a new era in terms of growth promotion and carcass modification,which will produce overnight what would have taken generations to select for. Of the compounds tested, porcine somatotropin (pST) has the most potential to alter the structure of the swine industry. Many fear the application of this technology because of potential increases in pork production displacing and leading to fewer producers. Because pork quality will be improved tremendously (50% reduction …

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Effects Of Dietary Lysine Level On Growing Pig Performance (1989), D F. Li, M E. Johnston, Jim L. Nelssen, Robert D. Goodband Jan 1989

Effects Of Dietary Lysine Level On Growing Pig Performance (1989), D F. Li, M E. Johnston, Jim L. Nelssen, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

A growth trial utilizing 120 pigs (avg initial wt 43.4 lb) was conducted to investigate the lysine requirement for pigs weighing 45 to 75 lb. Pigs were fed a corn-soybean meal diet containing .65, .75, .85, .95, or 1.05% lysine. Average daily gain (ADG) and feed/gain (F/G) were determined weekly, and plasma urea concentration was determined at the end of the first and last week of the experiment. At d 14, ADG was increased and F/G improved with increasing lysine level. Gain was best for pigs fed the .95% lysine diet at d 14 and for those fed .85% lysine …

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New Concepts In Breeding Barn Design (1989), D G. Levis Jan 1989

New Concepts In Breeding Barn Design (1989), D G. Levis

Kansas Agricultural Experiment Station Research Reports

Many existing swine breeding facilities have been designed to control the environment, provide continuous boar-sow contact for stimulating recently weaned sows to cycle, reduce the distance a weaned sow or boar has to be moved for mating, and reduce construction costs by not constructing breeding pens to be used only for mating. Pork producers operating these types of facilities have had problems with efficiency and accuracy of estrous detection, low percentage (70%) of sows bred twice, slick breeding floors, and excessive labor requirements. A breeding facility should be arranged so the work routines, such as estrous detection; moving, mating, and …

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Feed Utilization During Late Gestation By Polled Hereford And Simmental Cows, R.R. Schalles, G.H. Kiracofe, J.W. Wright Jan 1989

Feed Utilization During Late Gestation By Polled Hereford And Simmental Cows, R.R. Schalles, G.H. Kiracofe, J.W. Wright

Kansas Agricultural Experiment Station Research Reports

Thirty-one Polled Hereford and 29 Simmental cows were individually fed two energy levels for about the last 4 months before calving. Weight, condition score, backfat thickness, and reproduction were evaluated. No differences were found in efficiency of feed utilization between breeds or between energy levels. These cows started the experiment in moderate body condition, and a 10% reduction in dietary energy level during late gestation did not affect their reproductive performance.

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Syncro-Mate B® Induces Estrus In Cows Without Ovaries, W.J. Mcguire, G.H. Kiracofe Jan 1989

Syncro-Mate B® Induces Estrus In Cows Without Ovaries, W.J. Mcguire, G.H. Kiracofe

Kansas Agricultural Experiment Station Research Reports

Syncro-Mate B® was capable of inducing estrous behavior in ovariectomized cows. Lengthening the norgestomet implant period from 9 to 18 days did not prevent estrus. The ability of Syncro-Mate B to induce estrous behavior in ovariectomized cows helps explain the variable conception rates obtained after using this product in intact cows.

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Conception Rates Of Beef Heifers Treated With Gnrh Analog At The Time Of Estrus Or At The Time Of Artificial Insemination., L.R. Corah, W.E. Beal, M.F. Spire, Jeffrey S. Stevenson Jan 1989

Conception Rates Of Beef Heifers Treated With Gnrh Analog At The Time Of Estrus Or At The Time Of Artificial Insemination., L.R. Corah, W.E. Beal, M.F. Spire, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Injecting a GnRH-analog at the time of estrus or at insemination did not generally improve conception rates in heifers inseminated following a synchronized estrus. However, within some herds. a significant positive response was noted.

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Effect Of Limited-Creep Feeding On Performance Of Spring-Born Calves: Results Of 1988 Field Trials, D.D. Simms, Gerry L. Kuhl Jan 1989

Effect Of Limited-Creep Feeding On Performance Of Spring-Born Calves: Results Of 1988 Field Trials, D.D. Simms, Gerry L. Kuhl

Kansas Agricultural Experiment Station Research Reports

Two field trials were conducted to evaluate limited-creep feeding of spring- born calves using pelleted creep rations with either 0.5, 5, or 10% salt. Average daily gain was increased (P<.05) over controls in trial 2 and when both trials were combined. However, intakes were higher than desired and feed conversion much poorer than expected.

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Performance Of Stocker Steers Grazing Smooth Bromegrass At Two Stocking Rates And Dewormed With Morantel Tartrate, K.P. Coffey, Joseph L. Moyer, Lyle W. Lomas Jan 1989

Performance Of Stocker Steers Grazing Smooth Bromegrass At Two Stocking Rates And Dewormed With Morantel Tartrate, K.P. Coffey, Joseph L. Moyer, Lyle W. Lomas

Kansas Agricultural Experiment Station Research Reports

Early-intensive grazing of smooth bromegrass reduced animal gains but improved gain/acre. Morantel tartrate reduced fecal nematode egg counts but had no effect on animal performance at either stocking rate

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Evaluation Of Wheat Middlings As A Supplement For Cattle Consuming Winter Range Forage, G.D. Sunvold, R.C. Cochran, E.S. Vanzant, S.D. Brandyberry, R.B. Hightshoe, T. Delcurto Jan 1989

Evaluation Of Wheat Middlings As A Supplement For Cattle Consuming Winter Range Forage, G.D. Sunvold, R.C. Cochran, E.S. Vanzant, S.D. Brandyberry, R.B. Hightshoe, T. Delcurto

Kansas Agricultural Experiment Station Research Reports

Intake of dormant, bluestem-range forage was increased by feeding steers supplements based on wheat middlings or soybean meal + sorghum grain, although the degree of influence on forage intake depended on type and level of supplementation. All supplements increased (P<.10) total diet digestibility. However, fiber digestibility tended to be slightly lower for steers receiving the high level of wheat middlings and the soybean meal + sorghum grain supplement.

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Additive-Treated Corn And Forage Sorghum Silages For Growing Cattle, K.K. Bolsen, A. Laytimi, R.A. Hart, F. Niroomand, J. Hoover Jan 1989

Additive-Treated Corn And Forage Sorghum Silages For Growing Cattle, K.K. Bolsen, A. Laytimi, R.A. Hart, F. Niroomand, J. Hoover

Kansas Agricultural Experiment Station Research Reports

Whole-plant corn silages were treated with Ecosyl® or Foraform® in one trial and Biomate® or Biomate + Cold-flo® in the second trial. In both trials, the silages were well preserved, but all were highly unstable in air during the first 3 to 4 weeks of the feed-out period. Foraform-treated silage was 2 to 6 degrees F cooler than its control, but Cold-flo-treated silage was 2 to 8 degrees F warmer during the first 10 days post-filling. Laboratory silo results showed that both control silages fermented extremely fast; however, inoculated silages had slightly lower pH and higher lactic acid values through …

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Effect Of Foraform® On Fermentation Of Alfalfa, Corn, And Forage Sorghum Silages, K.K. Bolsen, A. Laytimi, A.D. Drysdale Jan 1989

Effect Of Foraform® On Fermentation Of Alfalfa, Corn, And Forage Sorghum Silages, K.K. Bolsen, A. Laytimi, A.D. Drysdale

Kansas Agricultural Experiment Station Research Reports

Foraform® was evaluated in four trials using alfalfa, corn, and two forage sorghums harvested in 1987 and ensiled in PVC laboratory silos. There was a dramatic crop by Foraform interaction, with Foraform delaying and restricting the fermentations, as expected, in alfalfa and corn. In both forage sorghum hybrids, although the ensiling process was delayed about 24 hours by the Foraform treatment, end-product silages had lower pH values and equal or higher lactic acid levels than untreated silages. Foraform was effective at both 60 to 90 F temperatures in alfalfa, with treated silages having lower lactic and acetic acids, ethanol, and …

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Dietary Fat And Calcium Level Effect On Feedlot Performance And Carcass Merit In Steers, B. Bock, Robert T. Brandt Jr., D.L. Harmon Jan 1989

Dietary Fat And Calcium Level Effect On Feedlot Performance And Carcass Merit In Steers, B. Bock, Robert T. Brandt Jr., D.L. Harmon

Kansas Agricultural Experiment Station Research Reports

Feeding fat increased feed intake and average daily gain, but feed efficiency was not affected. Feeding high levels of calcium (.9%) had no overall effect, but may tend to increase intake when fed with diets that contain primarily vegetable fat or highly unsaturated fat products.

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Dietary Influences On Pancreatic Amylase And Small Intestinal Disaccharidase Activities In Cattle, K.K. Kreikemeier, D.L. Harmon, K. Gross, C. Armendariz Jan 1989

Dietary Influences On Pancreatic Amylase And Small Intestinal Disaccharidase Activities In Cattle, K.K. Kreikemeier, D.L. Harmon, K. Gross, C. Armendariz

Kansas Agricultural Experiment Station Research Reports

Pancreatic α-amylase activity was 54% higher in cattle fed at twice maintenance energy than in cattle fed at maintenance and was 52% greater in hay-fed than grain-fed cattle. Increased pancreatic α-amylase activity probably represents increased secretion as well. α-amylase activity in small intestinal digesta was greater with increased energy intake and with hay feeding. Small intestine mucosal disaccharidase activities in cattle were unaffected by diet. Lactase activity was highest in the proximal segment of the small intestine and low in both mid and distal segments. Maltase and isomaltase activities were low in the duodenum, but increased toward the jejunum and …

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