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Dairy Science

Kansas State University Libraries

Kansas Agricultural Experiment Station Research Reports

1988

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Articles 1 - 15 of 15

Full-Text Articles in Life Sciences

Bovine Recombinant Interleukin-2 Enhances Resistance To Bovine Herpesvirus-1: Dose Response Trial (1988), P.G. Reddy, Frank Blecha, J.L. Morrill, H.C. Minocha Jan 1988

Bovine Recombinant Interleukin-2 Enhances Resistance To Bovine Herpesvirus-1: Dose Response Trial (1988), P.G. Reddy, Frank Blecha, J.L. Morrill, H.C. Minocha

Kansas Agricultural Experiment Station Research Reports

Twenty-five calves were allotted to five groups: controls that did not receive bovine recombinant interleukin-2 (rIL-2) and four groups that received 5 daily injections of rIL-2 at 11.4, 1.1,0.11, or 0.0 II µg/lb/day. On day 0 of the experiment, all calves received bovine herpesvirus-I (BHV-1) vaccine and the first of the 5 daily injections of bovine rIL-2. All calves were infected with BHV-Ion day 21 of the experiment. Calves treated with 11.4 µg /Ib/day had elevated rectal temperatures and mild diarrhea during administration of rIL2. All other calves were normal. Compared to control calves, those treated with 11.4, 1.1, and …

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Effect Of Route Of Administration Of Lasalocid On Response Of Young Dairy Calves (1988), S.D. Pruitt, J.L. Morrill, Tiruvoor G. Nagaraja, N.V. Anderson Jan 1988

Effect Of Route Of Administration Of Lasalocid On Response Of Young Dairy Calves (1988), S.D. Pruitt, J.L. Morrill, Tiruvoor G. Nagaraja, N.V. Anderson

Kansas Agricultural Experiment Station Research Reports

Forty newborn bull calves were assigned to one of four feeding groups. The feeds either contained lasalocid in milk (M), prestarter (PS), and starter (S); lasalocid in PS and S; lasalocid in S only; or no lasalocid. Calves were fed M at 8% of birth weight (bw) daily and offered PS to a maximum of 0.5 lb daily. When 0.5 lb of PS was consumed in one day the calves were fed M at 4% of bw daily. They were weaned when they consumed dry feed at the rate of 1.3% of bw. Daily feed intake and weekly weight gains …

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Small Intestinal Starch, Dextrin, And Glucose Digestion In Steers (1988), K.K. Kreikmeier, D.L. Harmon, T.B. Avery, Robert T. Brandt Jr. Jan 1988

Small Intestinal Starch, Dextrin, And Glucose Digestion In Steers (1988), K.K. Kreikmeier, D.L. Harmon, T.B. Avery, Robert T. Brandt Jr.

Kansas Agricultural Experiment Station Research Reports

Three Holstein steers (930 lb) were surgically fitted with abomasal and ileal cannulae, portal and mesenteric venous catheters, and an elevated carotid artery and used to study small intestinal starch digestion. Water, corn starch (66 g/hr), corn dextrin (66 g/hr), or glucose (66 g/hr) were continuously infused into the abomasum. Small intestinal disappearance of corn dextrin (57 g/hr) and glucose (57 g/hr) were higher (P<.05) than that of starch (48 g/hr). The percentage of carbohydrate disappearance accounted for as net portal glucose flux was 52, 54, and 72% for corn starch, corn dextrin, and glucose, respectively. Small intestinal starch utilization in the bovine may be limited by starch granular characteristics, enzyme activity, and glucose transport across the small intestine.; Dairy Day, 1988, Kansas State University, Manhattan, KS, 1988;

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Cause And Control Of Hydrolytic Rancidity In Raw Milk (1988), I.J. Jeon Jan 1988

Cause And Control Of Hydrolytic Rancidity In Raw Milk (1988), I.J. Jeon

Kansas Agricultural Experiment Station Research Reports

One of the common and important off-flavors in milk is hydrolytic rancidity or lipolyzed flavor. The rancidity results from hydrolytic cleavage of fatty acids from milk fat by the enzyme lipase and their release as free acids. The release of these acids in milk, even in very small amounts, imparts a bitter taste and a sharp, unpleasant aroma. The off-flavor is often described as "goaty", "butyric", "soapy", and "bitter" The term "bitter", however, is ambiguous because bitter flavors can occur from the result of protein breakdowns. Nevertheless, both farm and dairy plant problems may lead to its development. Once an …

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Milking Management Clinics (1988), James R. Dunham, Edward P. Call Jan 1988

Milking Management Clinics (1988), James R. Dunham, Edward P. Call

Kansas Agricultural Experiment Station Research Reports

Thirty Milking Management Clinics have been conducted at various on-farm locations. The clinics have demonstrated that good milking techniques can result in an additional 1891 lb milk yield/cow in a 10-mo lactation and an increased milk flow rate of 0.9 lb/min. Additional demonstrations include: I) teat dipping techniques, 2) proper sanitation programs, 3) antibiotic sensitivity culturing, 4) residue avoidance programs, 5) dry cow treatment techniques, and 6) milking equipment evaluation.; Dairy Day, 1988, Kansas State University, Manhattan, KS, 1988;

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Early Postpartum Luteal Function After Treatment With Progestin And(Or) Gonadotropin-Releasing Hormone In Dairy Cattle (1988), M.O. Mee, Jeffrey S. Stevenson Jan 1988

Early Postpartum Luteal Function After Treatment With Progestin And(Or) Gonadotropin-Releasing Hormone In Dairy Cattle (1988), M.O. Mee, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Progestin (Norgestomet®) and(or) repeated low-dose infusions of GnRH (Cystorelin@) influenced the lifespan of the first corpus luteum after an induced ovulation. Holstein cows (n=32) were assigned at calving to four groups. Cows were treated with blank ear implants (days 2 to 9 after calving) and saline infusion (48 hr on days 10 arid II), progestin ear implants and saline infusion, blank implants and GnRH infusion, or progestin implants and GnRH infusion prior to a GnRH-induced ovulation (day 12). Four primiparous and four multiparous cows were assigned to each treatment. Fewer cows treated with progestin/GnRH ovulated in response to the GnRH …

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Errors In Heat Detection Are Costly (1988), Jeffrey S. Stevenson Jan 1988

Errors In Heat Detection Are Costly (1988), Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Attention to heat detection will decrease reproduction losses and costs associated with extended calving intervals and high culling rates. Errors in diagnosing heat (errors of commission) and missed heats (errors of omission) are the major errors of a heat detection program. Priority must be given to heat detection to improve reproductive efficiency and reduce the costs of reproductive failure on dairy farms.; Dairy Day, 1988, Kansas State University, Manhattan, KS, 1988;

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Effects Of Production On Reproductive Traits In Kansas Holstein Herds (1988), Edward P. Call Jan 1988

Effects Of Production On Reproductive Traits In Kansas Holstein Herds (1988), Edward P. Call

Kansas Agricultural Experiment Station Research Reports

The analysis of dairy herds to evaluate the reported negative effect of production on reproduction failed to identify a real relationship. Higher-producing herds excel in all areas of reproductive performance, except conception rate. Of greatest importance is the annual reproductive loss that is affected by the reproductive traits measured. As production per cow increased, the yearly dollar loss per cow declined from a high of $163 to $73 yearly in the group averaging 20,118 lb milk.; Dairy Day, 1988, Kansas State University, Manhattan, KS, 1988;

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The Evaluation Of Rapid Methods For Monitoring Free Fatty Acid Levels In Cheese (1988), W.G. Ikins, H.S. Kwak, G.S. Zink, I.J. Jeon Jan 1988

The Evaluation Of Rapid Methods For Monitoring Free Fatty Acid Levels In Cheese (1988), W.G. Ikins, H.S. Kwak, G.S. Zink, I.J. Jeon

Kansas Agricultural Experiment Station Research Reports

The amount of free fatty acids present in cheese is important to dairy processors because these compounds make a significant contribution to the overall flavor. In this study, the results obtained using three relatively rapid methods of determining free fatty acids concentrations in cheese were compared to those acquired by using a more laborious but accurate gas chromatographic technique. One method, the Extraction-Titration Method, was found to be superior to the others because of its simplicity and reliability. In addition, the values obtained by this method were found to closely correlate with short chain fatty acid concentrations of cheese as …

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Nutrient Requirements Of Dairy Cattle Revised (1988), James R. Dunham Jan 1988

Nutrient Requirements Of Dairy Cattle Revised (1988), James R. Dunham

Kansas Agricultural Experiment Station Research Reports

The 1988 National Research Council's (NRC) Nutrient Requirements of Dairy Cattle have been revised. Adjustments have been made in the recommended requirements for net energy for lactation (NEL); crude protein (CP); calcium (Ca); phosphorus (P); and vitamins A, D, and E. In addition, suggestions are made for using undegraded intake protein (UIP) and degraded intake protein (DIP) for diet formulation.; Dairy Day, 1988, Kansas State University, Manhattan, KS, 1988;

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Timing Of Parturition In Dairy Cattle (1988), Jeffrey S. Stevenson Jan 1988

Timing Of Parturition In Dairy Cattle (1988), Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

A recent survey of calvings of dairy heifers and cows revealed that fall calvings occurred in a nonrandom pattern. The survey was conducted in a large 5,000-cow herd in which pregnant females were watched 24 hr/day. Fewer (P<.005) calves (42%) were born during the night-time hours of darkness (6 p.m. to 6 a.m.) than during daylight hours (58%). The time of day when calving occurred was unrelated to the duration of pregnancy or to any of the climatic variables measured, including daily temperatures (highs or lows), barometric pressure, relative humidity, precipitation, average wind velocity, or percentage of sunshine. Although some reports and popular opinion have suggested that time of calving might be influenced partly by prevailing weather conditions, our data fail to support this notion. We are unable to explain the observed nonrandom pattern of calving, except that it might be influenced by other management routines on the farm.; Dairy Day, 1988, Kansas State University, Manhattan, KS, 1988;

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Double Inseminations And Treatment Of Repeat Breeders With Gonadotropin-Releasing Hormone (1988), Jeffrey S. Stevenson, Edward P. Call, R.K. Scoby, A.P. Phatak Jan 1988

Double Inseminations And Treatment Of Repeat Breeders With Gonadotropin-Releasing Hormone (1988), Jeffrey S. Stevenson, Edward P. Call, R.K. Scoby, A.P. Phatak

Kansas Agricultural Experiment Station Research Reports

An experiment was conducted in one Kansas and five California dairy herds to determine if double inseminations with and without treatment with 100 µg gonadotropinreleasing hormone (GnRH) would improve conception rates of repeat-breeding dairy cattle (n=723). Both lactating cows and virgin dairy heifers were assigned randomly to treatments as repeat breeders, if they had failed to conceive to at least two previous services. Cows inseminated once and treated with GnRH had the best conception rates (41%), which were higher (P<.OI) than those of cows inseminated once without GnRH treatment (32%) and higher (P<.OI) than those of cows inseminated twice without treatment with GnRH (33%). Cattle bred twice that received the GnRH treatment had intermediate rates (37%). We conclude that treatment of repeat breeders with GnRH at the time of insemination (only one service given according to the am-pm, pm-am rule) improved conception rates.; Dairy Day, 1988, Kansas State University, Manhattan, KS, 1988;

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Managing The High-Producing Herd. Iii.Producing High Quality Milk (1988), John E. Shirley Jan 1988

Managing The High-Producing Herd. Iii.Producing High Quality Milk (1988), John E. Shirley

Kansas Agricultural Experiment Station Research Reports

Progress in the dairy industry over the past 30 yr can be defined as a movement toward fewer farms, more cows per farm, fewer total cows, more milk per cow, a gradual decline in total annual milk production from 1950 through 1975 followed by a sharp increase through 1985, a decrease in per capita consumption, and an increase in milk quality.; Dairy Day, 1988, Kansas State University, Manhattan, KS, 1988;

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Animal Drugs And The Milk Supply (1988), R.W. Wilson Jan 1988

Animal Drugs And The Milk Supply (1988), R.W. Wilson

Kansas Agricultural Experiment Station Research Reports

The makers of the laws, rules, and regulations governing the production and processing of milk have recognized that milk is the primary diet of the very young and old. This fact mandates that it should be produced and processed in a manner to protect and maintain it in a pure, safe, and unadulterated condition. To determine adulteration of any milk product, one must first understand the legal definition of that product. In general, milk is defined as "the lacteal secretion of healthy cows that is practically free from colostrum." Anything that alters the product from the intent of this definition …

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Quality Milk: A Veterinarian's Viewpoint (1988), D.A. Reid Jan 1988

Quality Milk: A Veterinarian's Viewpoint (1988), D.A. Reid

Kansas Agricultural Experiment Station Research Reports

I would like to thank the organizers of this program for the opportunity to speak to you today on a subject that I feel is of the utmost importance to the dairy industry in the U.S. The problem to which I am referring is not the current devastating drought that has affected many of the dairy-producing areas in our country, but rather the repercussions of the dairy industry's inability to market a wholesome uncontaminated product that is viewed as such by a majority of the consumers in the U.S. I am sure that most of us here can remember the …

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