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B.R. Min W. E. Pinchak D. P. Malinowski


Little information is available comparing wheat forage varieties, rumen fermentation and biomass production for different wheat (Triticum aestivum L.) cultivars. A combination of grazing and in vitro experiments was conducted at Texas A & M (TAM) AgriLife Research and Extension Center, Vernon, TX from 2003 to 2004.  Our objective was to determine the effects of wheat varieties (WV) and forage allowances (FA) on in vitro rumen fermentation rate, forage biomass production, time of sampling, and grain yields under grazing by steers. The 2003 experiment consisted of 14 commercial wheat cultivars (a part of the UVT collection) and was a part of the TAM Wheat Breeding Program statewide evaluation test. Hereford steers (Bos tuurus L.; 220 to 233 kg) were grazed from November 2003 to May 2004. Grain yield was measured in May 2004. Across WV, total forage protein and soluble protein content were declined from February to March 2004. Total forage protein contents were higher for HG-9, Thunderbolt and Maton Rye than for Lockett, Cutter, Jagalene and Triticale in March. In vitro dry matter (DM) digestibility (IVDMD) was greater (P<0.01) for Maton Rye than for other WV. Forage DM production varied between FA (P<001), grazing (P<0.001), and WV (P<0.001), with no FA x WV and FA x WV x grazing interactions. Total forage DM production was greater (P<0.001) for Gagalene, Longhoern, TAM 111, TAM Bar 501, Lockett, Marton rye, and Jagalene than for HG-9, Triticale 5019, and Triticale 6331 WV in high-FA during grazing, but DM production in un-grazed plot was higher for Triticale 5019, TAM Bar 501 and Jagalene than for HG-9 and Ogallala varieties during the end of March. Across FA, forage DM production (kg DM/ha) in high-FA was higher (P<0.001) DM production than low-FA. Potential in vitro rumen DM disappearance rate (a+b; %) was not differences among WV and time of sampling date, but instantly solubilized rate (a) in the rumen was higher (P<0.05) for Maton rye and Cutter in February and Triticale, Maton rye and Jagalene in March 17 than for other WV, which lead to differentiation of high soluble carbohydrate among forage WV. Similar to rumen DM disappearance rate, instantly NDF solubilized rate (a: %) in the rumen were higher (P<0.05) for Triticale, Maton rye and Jagalene in March 17 than for other WV, suggests that higher rate of instantly solubilized of DM, rate of disappearance rate, and instantly solubilized NDF in the rumen may lead to initiating trigger factor for frothy bloat and need to further study. When steers grazing on high-FA, grain yields were greater (P<0.01) for 2174, Lockett, Thurnderbolt, TAM 111, and HG-9 than for low-FA, with Gagalene and Cutter being produced higher (P<0.01) grain yield than other WV. The pull of date (POD) response to grain yield depends upon the time of date with no or variable responses of grain yield with increasing time of date up to March 08. When POD after March 08 or thereafter, grain yield progressively decreased with time. Therefore, beneficial effects of POD for dual purpose winter wheat occur in the range from February 19 to March 08.

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1. AOAC. 1990. Official Methods of Analysis. 15th ed. Assoc. Off. Anal. Chem., Arlington, VA.
2. Barry, T.N., and D.A. Forss. 1983. The condensed tannin content of vegetative Lotus pedunculatus, its regulation by fertilizer application, and eff ect on protein solubility. J. Sci. Food Agric. 34:1047–1056.
3. Bartley, E.E., G.W. Barr, and R.M. Mickelsen. 1975. Bloat in cattle. XVII. Wheat pasture bloat and its prevention with proloxalene. J. Anim. Sci. 41:752-756.
4. Blair, R.M.; Alcaniz, R.; Harrell, A. 1983. Shade intensity influences the nutrient quality and digestibility of southern deer browse leaves. J. Range Manag. , 36, 257–264.
5. Carver, B.F., Krenzer Jr., E.G., Whitmore, W.E., 1991. Seasonal forage production and regrowth of hard and soft red winter wheat. Agronomy Journal 83, 533-537.
6. Cheng, K-J., McAllister, T.A., Popp, J.D., Hristov, A., Mir, Z. and Shin, H.T., 1998. A review of bloat in feedlot cattle. Journal of Animal Science 76:299-308.
7. Christiansen, S., Svejcar, T., Phillips, W.A., 1989. Spring and fall cattle grazing effects on components and total grain yield of winter wheat. Agronomy Journal 81, 145-150.
8. Cravey, M.D., G.W. Horn, F.T. McCollum, P.A. Beck, and B.G. McDaniel. 1993. High-starcha ndh igh-fiber supplementsim provep erformance of stocker cattle grazing wheat pasture, p. 262-268. In: Anim. Sci. Res. Rep., Oklahoma Agr. Exp. Sta. MP-933, Stillwater, Okla.
9. Hemming, J.D.C., and R.L. Lindroth. 1999. Eff ects of light and nutrient availability on aspen: Growth, phytochemistry, and insect performance. J. Chem. Ecol. 25:1687–1714.
10. Horn, G. W., B. R. Clay, and L. I. Croy. 1977. Wheat pasture bloat of stockers. Anim. Sci. Res. Report No. MP-101:26–31. Oklahoma Agric. Exp. Stn., Stillwater.
11. Horn, G.W. and D.F. Frost. 1982. Ruminal motility of stocker cattle grazed on winter wheat pasture. J. Anim. Sci. 55:976-981.

12. Horn, G.W., T.L. hfader, S.L. Armbmster and R.R. Frahm. 1981. Effect of monensin on ruminal fermentation, forage intake and weight gains of wheat pasture stocker cattle. J. Anim. Sci. 52~447-451.
13. Horn, G. W., M. D. Cravey, F. T. McCollum, C. A. Strasia, E. G. Krenzer, Jr., and P. L. Claypool. 1995. Influence of high-starch vs. high-fiber energy supplements on performance of stocker cattle grazing wheat pasture and subsequent feedlot performance.
14. J. Anim. Sci. 73:45–54.
15. Horn, G. W., and S. I. Paisley. 1999. Developments in the management and supplementation of stocker cattle on wheat pasture. Pages 48–54 in Proc. 1999 Plains Nutr. Counc. Spring Conf., San Antonio, TX. Texas A&M Res. Ext. Center, Amarillo.
16. Holliday, R, 1956. Fodder production from winter-sown cereals and its e€ect upon grain yield. Field Crop Abstracts 9, 129±135, 207-213.
17. Howarth, R.E., Cheng, K-J., Majak, W, Costerton, J.W 1986. Ruminant bloat. Pages 516-527 in Milligan, L.R; Grovum, W.L.; Dobson A., eds. Digestion and metabolism in ruminants. Prentice-Hall, Englewood Cliffs, N.J.
18. Lorenzo, M.; Assuero, S.G.; Tognetti, J.A. 2015. Low temperature differentially affects tillering in spring and winter wheat in association with changes in plant carbon status. Ann. App. Biol. 166, 236–248.
19. Mader, T.L. and G.W. Horn. 1986. Low-quality roughages for steers grazing wheat pasture. II. Effect on wheat forage intake and utilization. J. Anim. Sci. 62:1113-l 119
20. Majak, W., Garland, G.J., Lysyk, T.J. 2008. The effect of feeding hay before fresh alfalfa on the occurrence of frothy bloat in cattle. Can. J. Anim. Sci. 88:1-3.
21. MacKown, C., carver, B.F., and Edwards, J.T. 2008. Occurrence of condensed tannins in wheat and feasibility for reducing pasture bloat. Crop Sci. 48: 2470-2480
22. Malinowski, D.P., D.W. Pitta, W.E. Pinchak, B.R. Min and Y.Y. Emendack. 2011. Effect of nitrogen fertilisation on diurnal phenolic concentration and foam strength in forage of hard red wehat (Triticum aestivum L.) cv. Cutter. Crop and Pasture Science 62: 656-665.
23. Martin, J.S., andMartin, M.M. 1982. Tannin assays in ecological studies: Lack of correlation between phenolics, proanthocyanidins and protein-precipitating constituents in mature foliage of six oak species.Oecologia 54:205–211.
24. McSweeney, C.S., Palmer, B., McNeill, D.M., and Krause, D.O. 2011. Microbial interactions with tannins: nutritional consequences for ruminants. Anim. Feed Sci. Technol. 91: 83-93.
25. Min, B.R., Attwood, G.T., Reilly, K., Sun, W., Peters, J.S., Barry, T.N., and McNabb, W.C. 2002. Lotus corniculatus condensed tannins decrease in vivo populations of proteolytic bacteria and affect nitrogen metabolism in the rumen of sheep. Canadian Journal of Microbiology 48:911-921.
26. Min, B.R.; Pinchak, W.E.; Fulford; J.D.; Puchala, R. 2005. Wheat pasture bloat dynamics, in vitro ruminal gas production, and potential bloat mitigation with condensed tannins. J. Anim. Sci. 83, 1322–1331.
27. Min, B.R., Barry, T.N., Attwood, G.T. and McNabb, W.C. 2003. The effect of condensed tannins on the nutrition and health of ruminants fed fresh temperate forages: a review. Animal Feed Science and Technology 106: 3-19.
28. Min, B. R., W. C. McNabb, T. N. Barry, and J. S. Peters. 2000. Solubilization and degradation of ribulose-1,5-bisphosphate carboxylase/ oxygenase (EC; Rubisco) protein from white clover (Trifolium repens) and Lotus corniculatus by rumen microorganisms and the effect of condensed tannins on these processes. J. Agric. Sci. 134:305–317.
29. Min, B.R., W. E. Pinchak, R. C. Anderson, J. D. Fulford and R. Puchala. 2006. Effect of condensed tannins supplementation level on weight gain and in vitro and in vivo bloat precursors in steers grazing winter wheat. Journal of Animal Science 84:2546-2554.
30. Min, B.R., Pinchak, W.E., and Fulford, J.D. 2007. In vitro and in vivo rumen fermentation and gas production: influence of corn and mineral oils and their bloat potential. Animal Feed Science and Technology 133:192-205.
31. Øorskov, E. R., and I. McDonald. 1979. The estimation of protein degradability in the rumen from incubation measurements weighted according to rate of passage. J. Agric. Sci. 92:499–503.
32. Paisley, S. I., and G. W. Horn. 1998. Effect of ionophore on rumen characteristics, gas production, and occurrence of bloat in cattle grazing winter wheat pasture. Anim. Sci. Res. Report No. P- 965:141–146. Oklahoma Agric. Exp. Stn., Stillwater.
33. Redmon, L.A., Horn, G.W., Krenzer Jr., E.G., Bernardo, D.J., 1995. A review of livestock grazing and wheat grain yield: Boom or bust? Agronomy Journal 87, 137-147.
34. Puchala, R., B. R. Min, A. L. Goetsch, and T. Sahlu. 2005. The effect of a condensed tannin-containing forage on methane emission by goats. J. Anim. Sci. 83:182–186.
35. Richard, S., G. Lapointe, R.G. Rutledge, and A. Seguin. 2000.Induction of chalcone synthase expression in white spruce by wounding and jasmonate. Plant Cell Physiol. 41:982–987.
36. Roberts, C.A., P.R. Beuselinck, M.R. Ellersieck, D.K. Davis, and R.L. McGraw. 1993. Quantifi cation of tannins in birdsfoot trefoil germplasm. Crop Sci. 33:675–679.
37. Salawu, M.B., Acamovic, T., Stewart, C.S., Maasdorp, B. 1997. Assessment of the nutritive value of Calliandra calothyrsus: its chemical composition and the influence of tannins, pipecolic acid and polyethylene glycol on in vitro organic matter digestibility. Animal Feed Science and Technology. 69: 207 – 217.
38. SAS, Institute, Inc. 1987. Sas/Statnl guide for personal computers. 6th ed. StatisticaAl nal. SystemI nstitute,I nc. Gary,N .C.
39. Springer, T.L., R.L. McGraw, and G.E. Aiken. 2002. Variation of condensed tannins in roundhead lespedeza germplasm. Crop Sci. 42:2157–2160.
40. Tanner, G.J., P.J. Moate, L.H. Davis, R.H. Laby, L. Yuguang, and P.A. Larkin. 1995. Proanthcyanidins (condensed tannisn) destabilize plant protein foams in a dose dependent manner. Aust. J. Agric. Res. 46:1101–1109.
41. Tognetti, J.A.; Salerno, C.L.; Crespi, M.D.; Pontis, H.G. 1990. Sucrose and fructan metabolism of different wheat cultivars at chilling temperatures. Physiol. Plant. 78, 554–559.
42. Van Soest, P.J., Robertson, J.D. and Lewis, B.A., 1991. Methods for dietary fiber, neutral
43. detergent fiber and non-starch polysaccharide in relation to animal nutrition. J. Dairy Sci. 74, 3583-3597.
44. Winter, S.R., and Musick, J.T., 1993. Wheat planting date e€ects on soil water extraction and grain yield. Agronomy Journal 85, 912-916.
45. Winter, S.R., and Thompson, E.K., 1990. Grazing winter wheat: I. Response of semidwarf cultivars to grain and grazed production systems. Agronomy Journal 82, 33-37.