Steer Responses to Feeding Soybean Hulls on Toxic Tall Fescue Pasture1

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Steer Responses to Feeding Soybean Hulls on Toxic Tall Fescue Pasture1 Powered By Docstoc
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Description: A grazing experiment was conducted in 2004 and 2005 to evaluate effects of feeding pelleted soybean hulls (SBH) on weight gain, hair coat rating, rectal temperature, and serum prolactin of steers grazed on toxic tall fescue [Schedonorus arundinaceus (Schreb.)]. Forty steers [initial BW in 2004 = 257 22 (SD) kg; initial BW in 2005 = 348 27 kg] were assigned to five 3-ha pastures of toxic tall fescue that were randomly assigned either with (n = 2) or without (n = 3) pelleted SBH (2.3 kg/d per steer, as fed) feeding. Grazing was initiated in early June and was terminated at 112 d of grazing in 2004 and at 102 d of grazing in 2005. Feeding pelleted SBH increased (P 0.10) between the 2 yr, ADG was less in 2005 when there was drier weather. Cost of additional ADG from feeding pelleted SBH was below (P 0.10) between treatments at the conclusion of grazing in both years. Rectal temperatures were not different (P 0.10) between years and treatments. Prolactin concentrations were not different (P 0.10) between treatments in 2005, but tended to be lower in SBH steers in 2005. Results indicated that feeding pelleted SBH can cost-effectively increase steer weight gain, but will not alleviate or reduce severity of toxicosis. [PUBLICATION ABSTRACT]
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