Beef Tips. Waggoner Beef Systems Specialist at Garden City. Upcoming Events

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1 Beef Tips Upcoming Events Cttlemen s Dy Mrch 7, 2008 Mnhttn, KS Round-up April 17, 2008 Hys, KS See detils on pge 6 Beef Improvement Federtion June 30-July 3, 2008 Clgry, Alert, Cnd Contriutors Dle Blsi Stocker, Forges Nutrition & Mgt dlsi@ksu.edu Joel DeRouchey Livestock Production jderouch@ksu.edu Krl Hrorth Livestock Production hrorth@ksu.edu Lrry Hollis Extension Beef Veterinrin lhollis@ksu.edu Sndy Johnson, Editor Livestock Production sndyj@ksu.edu Chris Reinhrdt Extension Feedlot Specilist cdr3@ksu.edu Twig Mrston Cow-Clf Mngement twig@ksu.edu Justin Wggoner Beef Systems Specilist jwggon@ksu.edu Deprtment of Animl Sciences & Industry Wggoner Beef Systems Specilist t Grden City Justin Wggoner is the newly hired Beef Systems Specilist t Knss Stte University s Southwest Are Extension Office in Grden City. Wggoner ws rised on his fmily s frm in centrl Knss nd otined his Bchelor s (2000) nd Mster s (2001) degrees in Animl Science from Knss Stte University. He completed his Doctorte in Ruminnt Nutrition t New Mexico Stte University in 2007 where his work evluted the impcts of moridity on performnce nd profitility in feedlot cttle nd nutrient utiliztion in stressed cttle. As Knss ntive, I m excited out the opportunity to serve eef cttle producers nd county gents in Southwest Knss, Wggoner sid. Wggoner hopes to ssist eef cttle producers in ll sectors of the industry y providing them with informtion regrding nutrition nd mngement strtegies tht improve profitility. Wggoner lso intends to continue pursuing his reserch interests regrding the influence of nutrition nd mngement prctices on cttle helth nd performnce. Wggoner my e reched t the Southwest Are Reserch nd Extension Office in Grden City t (620) or jwggon@ksu.edu. Modified stocking strtegies increse opportunities Keith Hrmoney, rngelnd scientist, A griculture Reserch Center-Hys Beef production on western Knss rngelnds is primrily dominted y cow/clf pirs. As tool to mnge pstures during yers of low precipittion, producers my lso include stocker nimls tht cn e mrketed t ny time to enle them to destock nd restock rngelnds without liquidting their min reeding herd. Intensive-erly stocking (IES), prctice tht stocks nimls t greter densities for the first hlf of the growing seson nd then totlly removes the nimls for the lst hlf of the growing seson, effectively utilizes erly seson vegettion t its highest level of nutrition. On shortgrss rngelnd in western Knss, stockers re typiclly grzed from My to Octoer under continuous seson long stocking (SLS) compred to My to mid-july in intensive-erly stocking. Individul niml gins during the erly growing seson re similr etween nimls stocked t twice the norml moderte seson-long stocking density (2X IES), nd nimls stocked t norml moderte seson long (SLS) density (Tle 1). Triple stocked intensive-erly stocking (3X IES) hs lso een evluted in western Knss, however erly seson individul niml gins nd end of seson grss dry mtter production (decreses rngelnd productivity) re significntly lower. Totl eef production on per cre sis is similr etween doule stocked intensive erly grzing nd seson long stocking in western Knss, while in estern Knss intensive erly doule stocking hs significntly greter eef production. Vegettive composition nd production re lso similr under the two stocking methods in western Knss. See Stocking Strtegies on Pge 2 Knss Stte University Agriculturl Experiment Sttion nd Coopertive Extension Service

2 Stocking Strtegies from pge 1. If cow/clf producers wnt flexiility in their eef cttle opertion, the ddition of stocker grzing cn provide tht flexiility. Rngelnds cn lso e stocked with modified intensive erly system, ut not ll modified systems re eneficil in western Knss. When implementing modified system t Hys, which stocked t doule stocking rte during the erly seson nd then removed hlf of the nimls t mid-seson (2X + 1 IES), erly seson niml gins were 15% lower thn for seson long stocking in two out of four yers, nd full seson individul niml gins were 25% lower for the modified system in three of four yers. A slightly different modified intensive erly system (1.6X + 1 IES) reduced the density of nimls erly in the seson to 1.6 times norml then removed the heviest nimls t mid-seson to leve lighter set of nimls on psture t norml density for the lst hlf of the seson. The gol of this system ws to retin mximum erly seson gins experienced y seson long systems ut with greter niml density, nd to increse lte seson gins per niml nd gins per cre y llowing more forge regrowth to e ville per lte seson niml unit stocked. Removl of the heviest nimls t mid-seson, rther thn rndom selection of nimls, results in hevier, more uniform nimls for direct plcement into the feedlot. This 1.6X + 1 modified system with removl of the heviest nimls t the middle of the growing seson hs een compred to continuous seson long stocking from 2002 to 2007 t the KSU Ag Reserch Center in Hys. No difference hs een found etween verge dily gins nd totl niml gin for the seson long nd 1.6X + 1 systems during the first or lst hlf of the seson (Tle 2). Unlike the previous modified 2x + 1 IES study, niml gins were not reduced during either prt of the grzing seson, nd totl seson-long gin from nimls tht remined on psture from My to Octoer in oth the seson long nd the modified 1.6X systems were equl. Becuse niml gins were similr yet stocking rte ws greter for the modified 1.6X + 1 system, eef production per cre ws greter for the 1.6X + 1 system thn the seson long (85 l/cre vs. 69 l/cre). The incresed eef production lso creted n increse in net income ove seson long stocking of $9.84/cre ove purchse nd interest costs. Vegettive composition nd production etween the two systems hs lso een similr during this time spn. The only difference thus fr in vegettive composition hs een tht ufflogrss composition in the modified 1.6X + 1 system hs incresed y 0.5 percentge points per yer more quickly thn the seson long system. The totl seson stocking rte with the modified 1.6X + 1 system is out 20-25% greter thn with seson long stocking, nd is likely t the mximum level expected to not reduce nimls gins or vegettive productivity since 3X nd 2X + 1 systems, with stocking rtes 50% greter thn seson long stocking rtes, hve resulted in rpid declines in niml gin nd vegettive productivity. If cow/clf producers wnt flexiility in their eef cttle opertion, the ddition of stocker grzing cn provide tht flexiility. The reserch summrized here used steers s the stocker nimls, ut replcement heifers my lso work to initite stocker grzing progrm. An erly pregnncy test might e used to selectively remove nimls. Further, the option to implement different stocking strtegies, SLS, 2X IES, or 1.6X + 1 IES, provides even greter flexiility y offering different times nd proportions of nimls redy to mrket. Regrdless of the opertion, stocker strtegy likely exists tht could fit into most eef cow/clf production systems. Tle 1. Dt from KSU Ag Reserch Center - Hys Stocking System Erly Seson (~My 1-July 15) Lte Seson (~July 15-Oct 1) , ADG (l.) Totl Gin (l.) ADG (l.) Totl Gin (l.) SLS X IES X IES Tle 2. Dt from KSU Ag Reserch Center - Hys Stocking System Erly Seson (~My 1-July 15) Lte Seson (~July 15-Oct 1) ADG (l.) Totl Gin (l.) ADG (l.) Totl Gin (l.) SLS X + 1 IES

3 2008 Cttlemen s Dy Reserch Summries The following represent smpling of the summries from the 2008 Cttlemen s Dy Report. The entire report is online t: Restricting Vitmin A in Cttle Diets Improves Beef Crcss Mrling nd USDA Qulity nd Yield Grdes A. M. Arnett, M. J. Dniel, nd M. E. Dikemn Ojective: Determine the effects of supplementing Angus cross steers, wened t either erly or trditionl ges, with either zero or seven times the NRC recommended mount of dietry vitmin A on growth performnce, serum nd liver retinol content, nd crcss qulity nd yield grdes. Feedlot diets contining either zero or seven times the NRC recommended mount of vitmin A were fed to erly-wened (137 ± 26 dys) nd trditionlly-wened (199 ± 26 dys) Angus cross steers for 235 nd 175 dys, respectively. Body weights nd lood smples were collected, nd ultrsound imges were otined periodiclly throughout the experiment. Cttle were hrvested when ultrsound ckft verged 0.40 inches. Liver, muscle, nd ft smples were nlyzed for vitmin A nd ft content, nd crcss dt were collected. Rtio of Mrling produced per USDA Yield Grde in Steers Wened t Either Erly (EW) or Trditionl (TW) Ages Fed Diets with Either Very High (7X) or No Supplementl (0) Vitmin A. Mrling/Yield Grde Rtio EW + 7X Vitmin A EW + 0 Vitmin A TW + 7X Vitmin A TW + 0 Vitmin A Feeding no supplementl vitmin A to steers for up to 210 dys increses crcss mrling nd qulity grde without incresing ckft or reducing retil yield. These dvntges re enhnced when clves re erly-wened ner 140 dys of ge. Costs of Adopting Rdio Frequency Identifiction Reder Systems nd Tgging Services in Livestock Auction Mrkets K. Bolte, K. Dhuyvetter, nd T. Schroeder Ojective : Estimte nnulized costs of dopting rdio frequency identifiction (RFID) reder systems nd tgging services t livestock uction mrkets nd determine ssocited economies of size. A ntionl survey of livestock mrkets sked livestock mrket opertors 1) if they would offer RFID tgging service if the Ntionl Animl Identifiction System were fully implemented nd 2) if they hve dopted RFID reding system. Opertors were sked to provide informtion out the investments nd nnul expenses required to offer these services. This informtion ws used to estimte nnulized costs of the systems to livestock mrkets. Economies of size exist in doption of RFID tgging services nd RFID reder systems mong livestock uction mrkets. Costs per hed decrese s livestock usge increses when dding either service, nd costs per hed decrese s fcilities increse in cttle volume when RFID reder system is dopted. Estimted Annulized Costs of RFID Tgging Services nd RFID Reder Systems Among Livestock Aucti on Mrkets Annulized cost per hed RFID Service Avg. Min. Mx. tgging service 1 $3.21 $0.00 $61.49 reder system 2 $0.76 $0.14 $4.02 reder system 3 $0.19 $0.04 $ Cost of tgging per hed, excludes the cost of RFID tgs 2 RFID reding cost per hed, ssuming 25% of cttle sold nnully use the system 3 RFID reding cost per hed, ssuming 100% of cttle sold nnully use the system Lrge-volume livestock mrkets nd those tht will send higher percentge of cttle through such system re more likely dopters of RFID technology thn smll-volume mrkets nd/or those tht would not hevily utilize RFID technology. 3

4 2008 Cttlemen s Dy Reserch Summries, continued Implictions : Length of the Wening Period Does Not Affect Post-Wening Growth or Helth of Lightweight Summer- Wened Beef Clves J. W. Bolte, K. C. Olson, J. R. Jeger, D. U. Thomson, B. J. White, R. L. Lrson, G. A. Milliken, N. A. Sproul, nd M. D. Thoms Ojective: Test the vlidity of eef industry ssumptions out the pproprite length of rnch-oforigin wening periods for summer-wened clves ged 100 to 160 dys. Angus cross clves (n = 400) were strtified y ge nd ssigned to one of five wening periods (60, 45, 30, 15, or 0 dys) tht corresponded to the length of time etween seprtion from dms nd shipping to n uction mrket. Clves were vccinted ginst common diseses 14 dys efore seprtion from dms nd gin on the dy of seprtion. On common shipping dte (dy 0; August 24, 2007), clves were trnsported 3 hours to commercil uction mrket nd held for 14 hours. Clves were then trnsported 1 hour to feedlot. All clves were fed the sme diet free choice throughout the tril; they lso were monitored twice dily for symptoms of respirtory disese. Body condition of dms ws ssessed 60 dys efore nd 60 dys fter shipping. Effect of Wening Period Length on Incidence of Undifferentited Fever in Lightweight Clves during the First 30 Dys fter Feedlot Arrivl Restricted Feeding Improves Performnce of Growing Steers During Susequent Grzing on Ntive Flint Hills Psture C. O. Anglin, D. A. Blsi, K. C. Olson, C. D. Reinhrdt, M. P. Epp, R. D. Derstein, nd B. B. Brnhrdt Ojective: Determine if compenstory gin occurs during intensive erly stocked grzing following periods of dietry restriction. Steers were fed t dry mtter intkes of free choice or 2.00, 2.25, or 2.50% of ody weight for 45 dys in drylot. Intkes were djusted ccording to ody weight every 14 dys. Steers were sorted y weight nd tretment nd plced on psture My 1, Steers were removed from psture July 28, Weight, ls Finl Drylot nd Grzing Weights Ad-li Dry Mtter Intke Finl Drylot Wt. Mid-Grzing Wt. Finl-Grzed Wt. c Mens within weight period (r pttern) with different superscripts differ (P<0.05). c c % of Cttle Sick No Effect of Tretment (P = 0.12) 60 Dys 45 Dys 30 Dys 15 Dys 0 Dys Length of Wening Period Restricting steers dry mtter intke to 2.50% or 2.25% of ody weight in drylot will llow steers to compenste in terms of weight gin during erly intensive grzing. Limit-feeding cn lso reduce totl production costs. Under the conditions of our study, rnch-oforigin wening periods of etween 15 nd 60 dys did not improve clf helth or growth performnce reltive to shipping clves immeditely fter mternl seprtion. 4

5 2008 Cttlemen s Dy Reserch Summries, continued Zilmx Improves Performnce of Implnted nd Non-Implnted Finishing Steers T. J. Bx, J. P. Hutcheson, M. F. Miller, W. T. Nichols, M. N. Streeter, D. A. Ytes, nd B. J. Johnson Ojective : Evlute performnce of finishing steers dministered Zilmx during the lst 30 dys on feed with nd without steroidl implnts nd determine if there is n dditive effect with comined use of Zilmx nd steroidl implnts. Crossred steers (n = 2279) weighing 940 l were used in 91-dy finishing study to compre performnce nd crcss trits with nd without dministrtion of Revlor-S nd Zilmx, et-drenergic gonist. Steers received Revlor-S implnt or no implnt with nd without Zilmx for the lst 30 dys on feed followed y 3-dy withdrwl. Performnce ws mesured s verge dily gin, feed:gin rtio, hot crcss weight, dressing percentge, sucutneous ft, rieye re, nd mrling. Crude Glycerin Increses Performnce in Finishing Cttle G. L. Prsons, M. K. Shelor, nd J. S. Drouillrd Ojective : Determine the effects of feeding crude glycerin derived from soyen oil to finishing eef cttle. Crossred yerling heifers (n = 375; ± 63 ls) were fed finishing diets contining 0, 2, 4, 8, 12, or 16% crude glycerin (dry mtter sis). Cttle were locked y initil weight nd ssigned to one of the six diets with six to seven nimls per pen nd nine pens per diet. Cttle were housed in 54 concrete-surfced pens (392.9 ft 2 ) with roofs covering feed unks nd hlf the pen. Diets consisted of stemflked corn with 6% lflf hy nd 1.2% ure nd provided 300 mg monensin, 90 mg tylosin, nd 0.5 mg melengestrol cette per niml dily. Cttle were trnsitioned from the control diet (no glycerin) to diets contining incresing proportions of glycerin over period of 10 dys. Cttle hd free choice ccess to feed, nd diets were delivered once dily throughout the 85-dy tril. Weight Increse over Control (ls) Hot Crcss Weight of Steers Revlor-S Zilmx Revlor-S + Zilmx Effect of Dietry Glycerin on Feed: Gin Feed:Gin Glycerin, % of Dry Mtter Zilmx improves performnce of steers dministered steroidl implnts. Zilmx nd steroidl implnts dditively stimulte len growth y steers during the lst 30 dys on feed. Adding glycerin to cttle finishing diets improved weight gin nd efficiency, prticulrly when dded t levels of 8% or less of the diet dry mtter. 5

6 2008 Cttlemen s Dy Reserch Summries, continued Pckging Atmospheres Alter Beef Tenderness, Fresh Color Stility, nd Internl Cooked Color J. P. Groel, M. E. Dikemn, M. C. Hunt, nd G. A. Milliken Ojectives: Evlute the effects of different pckging tmospheres on eef strip loin tenderness, fresh color stility, nd internl cooked color. Select strip loin steks were pckged in highoxygen (HiO 2 ) modified tmosphere pckging (MAP), ultr -low oxygen lends with cron monoxide (ULO 2 CO) modified tmosphere pckging, or vcuum pckging (VP). Instrumentl tenderness nd instrumentl internl cooked color were mesured, nd fresh disply color ws scored y trined pnelists. Steks for instrumentl tenderness nd internl cooked color were cooked to 158 F, medium degree of doneness. Results: Steks pckged in high oxygen modified tmosphere pckging discolored fster nd to greter extent thn steks in ll other pckging tretments. Steks pckged in ultr-low oxygen lends with cron monoxide modified tmosphere pckging hd tenderness equl to or etter thn steks pckged in high oxygen modified tmosphere pckging. Pckging eef in ultr -low oxygen lends with cron monoxide modified tmosphere pckging provides right red color with extended color stility, llows for longer ging time nd incresed tenderness, nd results in n internl cooked color tht is expected for medium degree of doneness, ll of which re eneficil to the met industry. Reserch Roundup to e held in Hys The 2008 Reserch Roundup t the Agriculturl Reserch Center in Hys will e returning to the demonstrtion ren t the feedlot for its nnul progrm which egins with registrtion t 11:30 on Thursdy, April 17 th. An overview of ongoing reserch projects including reltionships etween mrling nd loin muscle depth on cow productivity, preconditioning nd wening mngement, sensors to monitor illness in cttle nd wlking tour will ll tke plce onsite t the feedlot. The progrm continues in the uditorium with discussion of vriety of reserch projects involving topics such s Vitmin A, stocker options, zilpterol, choline nd preconditioning. The keynote presenttion will e from Jim Drouillrd, ruminnt nutritionist with KSU summrizing recent studies on use of distiller s yproducts. For more informtion cll Pckging tmospheres ltered internl cooked color, with steks pckged in high oxygen modified tmosphere pckging exhiiting premture rowning. Strip loin steks pckged in high oxygen modified tmosphere pckging were less tender t the end of disply thn steks in other pckging tretments, which could e result of the shorter ging time ssocited with the high oxygen pckging system. 6