Asian Journal of Animal and Veterinary Advances1683-99191996-3289Academic Journals Inc.10.3923/ajava.2011.132.154KoknarogluH. HoffmanM.P. LoyD.D. TrenkleA. LawrenceJ.D. 2201162Purpose of the study was to integrate pasturing systems with drylot feeding systems and to compare performance, carcass characteristics and profitability of steers finished in the feedlot or backgrounded for various time on pasture and finished in the feedlot. For this purpose a three-year study, using 84 fall-born and 28 spring-born calves of similar genotypes each year, was designed. Fall and spring-born calves were started on test in May and October, respectively. Seven treatments were imposed: (1) fall-born calves directly into feedlot (FEEDLOT); (2 and 3) fall-born calves put on pasture with or without an ionophore and moved to the feedlot at the end of July (JI, JNI); (4 and 5) fall-born calves put on pasture with or without an ionophore and moved to the feedlot at the end of October (OI, ONI); (6 and 7) spring-born calves put on pasture with or without an ionophore and moved to the feedlot at the end of October (SI, SNI). Cattle on pasture receiving ionophore tended to gain faster (p>0.11), but lost this advantage in drylot (p>0.10). Overall, cattle started directly in the feedlot gained faster (p<0.001). All treatment groups graded 75% Choice or higher. Cattle started directly in the feedlot were the least profitable ($-46 vs $2; p<0.001). These results indicate that cattle fed on pasture for varying periods of time produced acceptable carcasses and that carcass price was an important variable affecting profitability. Thus, the timing of marketing is critical for optimizing profit.]]>Armentano, L.E. and J.W. Young,19832 in steers and the effects of monensin on volatile fatty acid kinetics.]]>11312651277Baardseth, P., G. Skrede, T. Naes, M.S. Thomassen, A. Iversen and L. Kaaber,19885317371742Bagley, C.P. and J.I. Feazel,198822295301Baile, C.A., C.L. McLaughlin, E.L. Potter and W. Chalupa,19794815011508Ballard, F.J., O.H. Fissell and I.G. Jarrett,1972126193200Bartos, S. and J. Skarda,197019139144Beede, D.K., G.T. Schelling, G.E. Mitchell Jr., R.E. Tucker, W.W. Gill, S.E. Koenig and T.O. Lindsey,198662857863Bennett, L.L., A.C. Hammond, M.J. Williams, W.E. Kunkle, D.D. Johnson, R.L. Preston and M.F. Miller,1995Arachis glabrata)-tropical grass pasture or concentrate.]]>7318811887Berge, P., Y. Geay and D. Micol,199128203222Bergen, W.G. and D.B. Bates,19845814651483Bertrand, J.E., R.L. West and D.D. Johnson,19851985Brandt, R.T., C.E. Owensby and C.T. Milton,19957271518Buchanan-Smith, J.G., C.H. Watson, W. Szkotnicki, O.B. Allen and J.W. Wilton,19951995Burns, J.C., K.R. Pond and D.S. Fisher,19916911991204Burrit, E.A., A.S. Bittner, J.C. Street and M.J. Anderson,1984in vitro dry matter digestibility of three maturing grasses.]]>6712091213Buxton, D.R.,199030402408Callaway, T.R., A.M.S. Carneiro de Melo and J.B. Russell,1997in vitro.]]>359096Casler, M.D.,198666591600Choat, W.T., C.R. Krehbiel, G.C. Duff, R.E. Kirksey and L.M. Lauriault et al.,20038131913201Chrystall, B.,19949316316Coffey, K.P. and J.L. Moyer,1992Acremonium coenophialum infected fescue pastures overseeded with ladino clover.]]>6541518Coleman, S.W. and B.C. Evans,19866319681982Coleman, S.W., S.P. Hart and T. Sahlu,200350129140Davis, G.W., A.B. Cole, W.R. Backus and S.L. Melton,198153651657Demircan, V., H. Koknaroglu, H. Yilmaz and Z. Dernek,200731143148Dikeman, M.E., K.N. Nagele, S.M. Myers, R.R. Schalles, D.H. Kroph, C.L. Kastner and F.A. Russo,198561137150Dinius, D.A., M.E. Simpson and P.B. Marsh,197642229234Dinius, D.A. and C.A. Baile,197745147153Dolezal, H.G., G.C. Smith, J.M. Savell and Z.L. Carpenter,198247368374Field, T.G. and R.E. Taylor,20034th Edn.,Fieser, B.G. and E.S. Vanzant,200482307318Fieser, B.G.,20072007Flipot, P.M., J.L. Dionne, G. Lalande and J.M. Girard,198666699710Fox, D.G., R.R. Johnson, R.L. Preston, T.R. Dockerty and E.W. Klosterman,197234310318Gill, D.R., J.R. Martin and R. Lake,197643363368Gill, D.R., F.T. McCollum, C.A. Strasia, J.J. Martin and R.L. Ball,1991pp: 114-121pp: 114-121Gill, D.R., F.T. McCaollum, C.A. Strasia, J.J. Martin, R.L. Ball and H.G. Dolezal,19921992Gill, D.R., M.C. King, H.G. Dolezal, J.J. Martin and C.A. Strasia,19931993Gill, D.R., F.N. Owens, M.C. King and H.G. Dolezal,19931993Grabber, J.H., D.R. Mertens, H. Kim, C. Funk, F. Lu and J. Ralph,200989122129Harrison, A.R., M.E. Smith, D.M. Allen, M.C. Hunt, C.L. Kastner and D.H. Kroph,197847383388Hedrick, H.B., J.A. Paterson, A.G. Matches, J.D. Thomas, R.E. Morrow, W.C. Stringer and R.J. Lipsey,198357791801Horn, G.W., P.A. Beck, J.G. Andrae and S.I. Paisley,200583E69E78Horn, G.W.,200622335356Hutchings, J.B. and P.J. Illford,198819103109Ingle, D.L., D.E. Bauman and U.S. Garrigus,1972In vitro study of tissue sites, carbon source and reducing equivalent generation for fatty acid synthesis.]]>102609616Jung, H.G., G.C. Fahey Jr. and N.R. Merchen,198350637651Koknaroglu, H., D.D. Loy, D.E. Wilson, M.P. Hoffman and J.D. Lawrence,200521286296Koknaroglu, H., A. Ali, D.G. Morrical and M.P. Hoffman,200651391399Koknaroglu, H., M.T. Toker and Y. Bozkurt,200614954Koknaroglu, H., K. Ekinci and M.P. Hoffman, 200730520Koknaroglu, H., A. Ali, K. Ekinci, D.G. Morrical and M.P. Hoffman, 20073095108Koknaroglu, H., D.D. Loy and M.P. Hoffman,200891469472Lancaster, L.R., R.R. Frahm and D.R. Gill,197337632636Larick, D.K. and B.E. Turner,199055312317Lewis, J.M., T.J. Klopfenstein, R.A. Stock and M.K. Nielsen,19906825172524Liepa, G.U., D.C. Beitz and J.R. Linder,197810817331739Lomax, M.A. and G.D. Baird,198349481496Melton, S.L.,19906844214435Min, B.R., W.E. Pinchak, J.D. Fulford and R. Puchala,2005in vitro and in vivo rumen characteristics and frothy bloat dynamics in steers grazing wheat pasture.]]>123-124615629Mullahey, J.J., S.S. Waller, K.J. Moore, L.E. Moser and T.J. Klopfenstein,199284183188Myers, S.E., D.B. Faulkner, T.G. Nash, L.L. Berger and D.F. Parret,199977311322NRC,19966th Edn.,O'Riordan, E.G. and P. O'Kiely,199630185217Oltjen, R.R., T.S. Rumsey and P.A. Putnam,197132327333Oltjen, R.R. and J.L. Becket,19967414061409Perry, T.W., D.A. Huber, G.O. Mott and C.L. Rhykerd,197132744748Perry, T.W., D.A. Huber, G.O. Mott, C.L. Rhykerd and R.W. Taylor,197234647652Perry, T.W., W.M. Beeson and M.T. Mohler,197642761765Phillips, W.A., J.W. Holloway and S.W. Coleman,1991Brahman crossbred feeder calves.]]>6931023111Poppi, D.P., D.J. Minson and J.H. Ternouth,19803299108Poppi, D.P., D.J. Minson and J.H. Ternouth,198132123137Prange, R.W., C.L. Davis and J.H. Clark,19784611201124Prichard, D.L., J.E. Bertrand and D.D. Johnson, 19881988Richardson, L.F., A.P. Raun, E.L. Potter, C.O. Cooley and R.P. Ratchmacher,1976in vitro and in vivo.]]>43657664Ridenour, K.W., H.E. Kiesling, G.P. Lofgreen and D.M. Stiffler,19825411151119Robelin, J.,198614349364Rompala, R.E., T.A. Hoagland and J.A. Meister,19906825302535Sainz, R.D., F. de la Torre and J.W. Oltjen,19957329712979Sainz, R.D. and R.F.V. Paganini,200482292297Sapp, P.H., M.A. McCann and S.E. Williams,19961996Saubidet, C.L. and L.S. Verde,1976226169Schaake, S.L., G.C. Skelly, E. Halpin, L.W. Grimes, R.B. Brown, D.L. Cross and C.E. Thompson,19937131993205Schelling, G.T.,19845815181527Schoonmaker, J.P., S.C. Loerch, F.L. Fluharty, H.N. Zerby and T.B. Turner,20028022472254Schroeder, J.W., D.A. Cramer, R.A. Bowling and C.W. Cook,198050852859Skelley, G.C., R.L. Edward, F.B. Wardlaw and A.K. Torrence,19784711021108Smith, S.B. and J.D. Crouse,1984114792800Smith, S.B., R.L. Prior, C.L. Ferrel and H.J. Mersmann,1984114153162Talbert, M.J., N. Gay, N.W. Bradley, L. Laughren and S. Harris,19792421517Van Nevel, C.J. and D.I. Demeyer,1977in vitro.]]>34251257Van Soest, P.J.,1982Verde, L.S. and A. Trenkle,198764426432Whetstone, H.D., C.L. Davis and M.P. Bryant,1981in vitro.]]>53803809Whitehurst, G.B., D.C. Beitz, M.A. Pothoven, W.R. Ellison and M.H. Crump,197810818061811Yang, Y.T. and R.L. Baldwin,197356350365Yang, C.M. and J.B. Russell,1993in vivo and the numbers of amino acid-fermenting bacteria.]]>7134703476