Beef research report

240 Pages·1993·8.7 MB·English

by  University of Illinois at Urbana-Champaign. Dept. of Animal Science

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Agriculture
Experiment
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Cooperative Extension Service
UniversityofIllinoisatUrbana-Champaign
HelpingYouPutKnowledgetoWork
Robert A. Easter, Head
Other faculty and staff involved with beef cattle research and extension.
L.L. Berger T.R. Carr Jim Dahlquist G.C. Fahey
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D.B. Faulkner F.A. Ireland D.J. Kesler F.K. McKeith
N.R. Merchen T.G. Nash D.F. Parrett R.S. Wells
THANK YOU
THE DEPARTMENT OF ANIMAL SCIENCES GRATEFULLY
ACKNOWLEDGES THE ASSISTANCE OF THE FOLLOWING
COMPANIES AND PEOPLE IN OUR BEEF PROGRAM
ADM,
Decatur, IL
Ajinomoto, Eddyville, IA
KY
Alltech Inc., Nicholasville,
American Breeders Service, DeForest, WI
NE
Baldridge Angus Ranch, North Platte,
Central Soya, Decatur, IN
Corn Products, Argo, IL
Robert Douglas, LTD, Robinson, IL
Elanco, Greenfield, IN
Fats and Proteins Research Foundation, Bloomington, IL
Forsythe Land and Cattle, Marshall, IL
Growmark, Bloomington, IL
GTA Feeds, Sioux Falls, SD
Hoechst-Roussel Agri-Vet, Somerville, NJ
Hoffman-LaRoche Inc., Nutley, NJ
Illinois BeefAssociation, Springfield, IL
Illinois Corn Marketing Board, Bloomington, IL
Illinois Soybean Program Operating Board, Bloomington, IL
InterAg (DEC International, Inc.), Hamilton, New Zealand
Intervet International, Boxmeer, The Netherlands
Lonza, Fairlawn, NJ
GA
Merial, Inc., Athens,
Milk Specialties Company, Dundee, IL
MSD MO
Agvet, St. Louis,
Moorman Manufacturing, Quincy, IL
Pharmacia/Upjohn Company, Kalamazoo, MI
Primeline Genetics, Overland Park, KS
MO
Purina Mills, St. Louis,
Shady Brook Angus Farms, Leoma, TN
Sunny Valley Angus, Yorkville, IL
VetLife, Winterset, IA

VOLUME
25
CONTENTS
BEEF NUTRITION AND MANAGEMENT
PERFORMANCE OF NURSING CALVES FED SUPPLEMENT WITH VARYING
PROTEIN LEVELS 2
COMPARISON OF THREE WEANING AGES ON COW-CALF PERFORMANCE
AND STEER CARCASS TRAITS 9
PERFORMANCE AND CARCASS TRAITS OF EARLY WEANED STEERS
RECEIVING EITHER A PASTURE GROWING PERIOD OR A FINISHING RATION
AT WEANING 22
EFFECTS OF PRENATAL ANDROGENIZATION AND IMPLANTATION ON
FEEDLOT PERFORMANCE AND CARCASS COMPOSITION OF SINGLE-CALF
HEIFERS 41
EFFECTS OF LACTATIONAL STATUS ON THE PERFORMANCE AND CARCASS
COMPOSITION OF 30-MONTH-OLD HEIFERS IN THE SINGLE-CALF HEIFER
SYSTEM
51
EFFECTS OF ENERGY INTAKE LEVEL DURING THE GROWING PHASE ON
FEEDLOT STEER PERFORMANCE AND CARCASS COMPOSITION 57
THE EFFECTS OF CORN MILLING CO-PRODUCTS ON GROWTH
PERFORMANCE AND DIET DIGESTIBILITY BY BEEF CATTLE 67
SITES OF ORGANIC MATTER, FIBER, AND STARCH DIGESTION IN STEERS
FED FRESH ALFALFA AND SUPPLEMENTED WITH INCREASED LEVELS OF
CRACKED CORN
79
SITES OF PROTEIN AND AMINO ACID DIGESTION IN STEERS FED FRESH
ALFALFA AND SUPPLEMENTED WITH INCREASED LEVELS OF CRACKED
CORN
91
FORAGE QUALITY OF ALFALFA AND GRASS DURING THE FIRST SPRING
GROWTH IN CENTRAL ILLINOIS 102
COMPOSITION OF FRESH FORAGES DURING THE SPRING GROWTH 110
EFFECTS OF SPECIES AND STAGES OF MATURITY OF FRESH FORAGES ON
IN SITU DRY MATTER AND CRUDE PROTEIN DEGRADATION 120
A SUMMARY OF THE ILLINOIS IRM-SPA BEEF COW BUSINESS RECORD 132
REPRODUCTION AND PHYSIOLOGY
EFFECT OF PROSTAGLANDIN F -AND GONADOTROPIN RELEASING
2a
HORMONE-INDUCED LUTEINIZING HORMONE RELEASES ON OVULATION
AND CORPUS LUTEUM FUNCTION OF BEEF COWS 139
EFFECT OF GONADOTROPIN RELEASING HORMONE ON PREGNANCY
RATES OF BEEF HEIFERS AND COWS ESTRUS-SYNCHRONIZED WITH
MELENGESTROL ACETATE AND PROSTAGLANDIN F 149
2a
EFFECT OF METHOD OF SYNCHRONIZATION, TWO INJECTIONS OF PGF
2a,
VS GnRH AND PGF ON CORPORA LUTEA DEVELOPMENT AND REGRESSION
2a,
AND SYNCHRONIZED PREGNANCY RATES: A PRELIMINARY REPORT 162
EFFICACY OF SUSTAINED RELEASE NEEDLE-LESS CEFTIOFUR SODIUM
IMPLANTS IN TREATING CALVES WITH BOVINE RESPIRATORY DISEASE 165
GONADORELIN-INDUCED TESTOSTERONE RELEASE: A BIOLOGICAL ASSAY
FOR QUALITY ASSURANCE OF GONADORELIN 179
ADMINISTRATION OF PHARMACEUTICALS AND VACCINES VIA REMOTE
DELIVERY IN BIODEGRADABLE, NEEDLE-LESS IMPLANTS 190
PREGNANCY DETECTION VIA THE EARLY CONCEPTION FACTOR ASSAY: A
PRELIMINARY REPORT 203
NORGESTOMET IMPLANTS ENHANCE EMBRYO SURVIVAL IN POSTPARTUM
COWS: A PRELIMINARY REPORT 206
ESTRUS RESPONSE AND PREGNANCY RATES OF BEEF FEMALES
ADMINISTERED INTRAVAGINAL PROGESTERONE INSERTS AND PGF FOR
2a
ESTRUS SYNCHRONIZATION: A PRELIMINARY REPORT 212
MOUNTING ACTIVITY DETECTED BY MEANS OF MOUNTING ACTIVITY
MONITORS OF BEEF FEMALES ADMINISTERED SYNCRO-MATE B FOR
ESTRUS SYNCHRONIZATION 215