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OF UNIVERSITY UBRARY ILLINOIS URBANA-CHAMPWGN AT NOTICE:ReturnorrenewallLibraryMaterials!TheMinimumFee(or each Lost Book is $50.00. The person charging this material is responsible for us i(turn to the library from which it was withdrawn on or before the Latest Date stamped below. Theft, mutilation,and underliningofbooksarereasonsfordiscipli- naryactionand may result in dismissal fromthe University. To renew call Telephone Center, 333-8400 UNIVERSITY OF ILLINOIS LIBRARY AT URBANA-CHAMPAIGN L161—O-1096 ACES RY I AUG 1 2 2002 ILLINOIS I /^90/91 cop. 3^ a-r^ Research Report and 635 Agriculture Experiment Proceedings Station 1990-91 Cooperative Extension Service UniversityofIllinoisatUrbana-Champaign HelpingYouPutKnowledgetoWork ilBft w ILLINOIFSSWBREFEFFFAASSSSrOCIATION Illinois Department of Energyand Natural Resources D.R. Campion, Head Other faculty and staff involved with beef cattle research and extension. Tk L.L. Berger D.D. Buskirk T.R. Carr J.W. Castree G.C. Fahey D.B. Faulkner R.L. Fernando H.W. Gonyou D.J. Kesler H.A. Lewin F.K. McKeith N.R. Merchen D.R Parrett L.H. Thompson C.L. Willms CONTENTS THE DEPARTMENT OF ANIMAL SCIENCES, UNIVERSITY OF ILLINOIS 1 UNIVERSITY OF ILLINOIS PUREBRED ANGUS HERD 2 EFFECTS OF SYNOVEX-S3 ALONE OR IN COMBINATION WITH FINAPLIX-Sb ON PERFORMANCE AND CARCASS CHARACTERISTICS IN FINISHING STEERS 3 THE EFFECTS OF CORN VS SOYHULLS LIMITED VS AD LIBITUM INTAKE AS A CREEP SUPPLEMENT ON CALF PERFORMANCE, SUBSEQUENT PERFORMANCE DURING GROWING AND FINISHING AND CARCASS CHARACTERISTICS 8 EFFECTS OF ALKALINE HYDROGEN PEROXIDE-TREATED WHEAT STRAW AND CORN SILAGE SUPPLEMENTED WITH DIFFERENT LEVELS AND SOURCES OF PROTEIN ON PERFORMANCE OF GROWING CATTLE AND SUBSEQUENT FINISHING PHASE PERFORMANCE 13 EFFECTS OF INCREASING CRUDE PROTEIN LEVEL ON INTESTINAL SUPPLY OF AMINO ACIDS IN LAMBS FED ALKALINE HYDROGEN PEROXIDE-TREATED WHEAT STRAW-BASED DIETS 23 EFFECTS OF SUPPLEMENTAL PROTEIN SOURCE AND LEVEL OF UREA ON INTESTINAL AMINO ACID SUPPLY IN LAMBS FED ALKALINE HYDROGEN PEROXIDE-TREATED WHEAT STRAW-BASED DIETS 36 EFFECTS OF FEEDING ALKALINE HYDROGEN PEROXIDE-TREATED OAT HULL-BASED AND RICE STRAW-BASED DIETS ON FEED INTAKE AND NUTRIENT DIGESTIBILITY BY GROWING WETHERS 50 THE EFFECT OF MELENGESTROL ACETATE ON THE FERTILITY OF BEEF HEIFERS 66 THE EFFECT OF REPETITIVE SYNCRO-MATE B TREATMENT ON FERTILITY OF BEEF HEIFERS 68 FERTILITY OF PRENATALLY ANDROGENIZED FEMALES 70 THE EFFECT OF TESTOSTERONE TREATED GOMER COWS ON POSTPARTUM REPRODUCTION. .. .72 THE EFFECT OF RESYNCHRONIZATION OF BEEF FEMALES BRED BY VARIOUS METHODS 75 REDUCING ENERGY CONSUMPTION AND IMPROVING WATER QUALITY WITH BEEF CATTLE.... 79 CROSSBREEDING PROGRAMS - PRACTICAL CONSIDERATIONS 82 BEEF PERFORMANCE RECORDS - FITTING EPD'S TO YOUR PRODUCTION OBJECTIVES 86 ILLINOIS INTENSIVE GRAZING MANAGEMENT '89 UPDATE 90 EPD GROUP RANKING 95 FENCING SYSTEM COMPARISONS 98 GROWTH OF SPRING AND FALL CALVED HEIFERS GRAZING HIGH OR LOW ENDOPHYTE INFECTED TALL FESCUE PASTURES 104 A GUIDE FOR ESTIMATING SEASON LONG PASTURE DAYS IN ILLINOIS 107 MANAGING BEEF REPLACEMENT HEIFERS Ill THANK YOU THE DEPARTMENT OF ANIMAL SCIENCES GRATEFULLY ACKNOWLEDGES THE ASSISTANCE OF THE FOLLOWING COMPANIES AND PEOPLE IN OUR BEEF PROGRAM: ADM, Decatur, IL Ballistivet, Minneapolis, MN Robert L. Douglas, Robinson, IL DuPont & Company, Wilmington, DE Engelbrecht Angus Farm, Henry, IL Hoffman-LaRoche Inc., Nutley, NJ Illinois Beef Council, Springfield, IL Carol Keiser, Carlinville, IL Kenworth Simmentals, Carlinville, IL Randall Loveless, Carlinville, IL National Livestock and Meat Board, Chicago, IL Pitman Moore, Terre Haute, IN Premier Angus, Cloverdale, IN Purina Mills, St. Louis, MO R & J Ranch, Briggs, TX SANOFI Animal Health, Overland Park, KS Syntex Company, Des Moines, IA THE DEPARTMENT OF ANIMAL SCIENCES UNIVERSITY OF ILLINOIS Dennis R. Campion, Head of Department On behalf of the faculty, staff and students involved in beef cattle research, teaching and extension, I am pleased to introduce the 1990 Beef Cattle Research Report. This past year has been an exciting and very active year for the Department and the beef cattle program. Construction of the new wings on the Animal Sciences Laboratory will be completed April, 1991. Then renovation of the existing building will be initiated with completion scheduled for December, 1992. The adjacent Plant and Animal Biotechnology Laboratory will be ready January, 1990. Several faculty members will be housed in this Laboratory while ASL is being renovated. Modern animal facilities are featured in PABL which will allow progress to be made in the area of molecular genetics and immunology. With the hiring of a very capable support staff and the stocking of the Orr Animal Research Center, our beef cattle research program is now fully integrated and operational. Dr. Dan Faulkner continues to be the leader in coordinating the Campus and Center beef cattle operations. An outstanding faculty which includes Doctors Berger, Fahey, Faulkner, Merchen and Parrett is devoted to beef cattle research. The team is also composed ofother collaborating investigators and many graduate students and support personnel. This group is to be commended for their excellent research, teaching and public service activities in the beef cattle area. Their interest in the industry as well as in our beef cattle-oriented students is evidenced by the excellent ways in which they have successfully integrated state-of-the-art teaching with creative and original research, both basic and applied. The "team effort" is geared toward helping our Illinois beef cattle industry be among the best and most innovative in the country. Professors in the areas of rumen microbiology, reproductive physiology and meat science have also made significant contributions to our beef cattle research program. -1- UNIVERSITY OF ILLINOIS PUREBRED ANGUS HERD D. F. Parrett, D. B. Faulkner and C. L. Willms The University of Illinois maintains 60 spring calving purebred Angus cattle. In addition, ten to fifteen replacement heifers are retained each year. The cattle are used in research and teaching. Teaching uses include, beef production, livestock judging and evaluation courses, and special learning classes for undergraduate student research projects. The students gain experience in performance record keeping, animal selection, hands-on laboratory experience, heat-detection, calving and general beef cow herd management. Most of the research conducted using the cattle is related to applied nutrition and new management techniques. Recent work has concentrated on previous androgenization effects of beef calves, limited creep feeding, various estrous synchronization techniques for beef cows and gene mapping of purebred lines of cattle. Many clinics, workshops and judging activities also make use of the purebred cattle. The herd also serves as a catalyst for interaction between the Department of Animal Science staff members and the Illinois purebred cattle industry. Performance tested bulls are sold each year through the Illinois Performance Tested Bull Sale. Bulls are also raised and used as herd sires for the commercial cow herds at the Dixon Springs and Orr Research Centers. By raising our own herd sires, we can provide predictable performance and uniformity in the cattle raised for research trials. Of particular importance is the development of a calving ease herd within the Angus herd. These cattle are bred specifically for low birth weight EPD's. This group will become an increasingly important segment of our targeted purebred production program. EPD's (expected progeny differences) are used extensively in designing the breeding programs, with a goal of optimum performance for our environment (table 1). Many breeders have supported our Angus program and we appreciate their efforts to enhance our program. The University of Illinois Angus cattle have been well accepted in recent years, having the top indexing bull in 1988 and second top indexing yearling bull in 1989 at the Illinois Beef Performance Tested Bull Sale. Also, in the last two Illinois Angus Futurities, the University has consigned one of the top-selling bred females, having the champion heifer in 1988. TABLE 1. SIRES USED TO PRODUCE THE 1991 CALF CROP Expected Proqenv Differences Sire Birth Weanl inq Milk Yearl inq Hoff Hi Spade SC491 4.0 50.5 14.3 83.2 R & J Extra 493 3.4 41.5 9.4 70.6 R & J Maxima 4.9 37.6 16.4 53.1 Brost Dan Patch 7.0 51.6 12.8 86.0 Fairfield Dark Star 6.3 52.4 18.8 82.5 SS Rito 0715 0H3 -4.5 20.3 6.2 32.5 R & J Milky Way .2 44.5 16.3 61.8 -2-