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Newspaper Levels as Roughage in Ruminant Rations^{1, 2,}

Texas Tech University Center, Pantex 79069

Abstract

NEWSPAPER was evaluated and compared with sudan hay as a roughage in high concentrate finishing rations with heifers and in a digestibility trial with sheep fed 45% roughage rations. The newspaper was ground (1.27 cm screen) and fed in isonitrogenous, 10% roughage finishing rations at levels of 0, 3.3, 6.7 and 10.0% replacing equal portions of ground sudan hay by weight. Rations for the digestibility trial contained 45% roughage with the newspaper replacing sudan hay at levels of 0, 7.5, 15.0 and 30.0% by weight. Daily gains and voluntary feed intake were comparable for heifers fed the control and 3.3% newspaper rations and decreased (P<.05) with each of the two higher newspaper levels. Efficiency of feed conversion was reduced with each higher level of newspaper. These feedlot performance data were expressed by significant (P<.05) linear responses. Standard carcass traits and particularly those associated with finishing also decreased as newspaper levels increased. Digestibility of the major energy components decreased with each higher newspaper level and these reductions in digestibility were expressed by significant linear responses (P<.01). Protein digestibility was slightly lower at the 7.5 and 15.0% newspaper levels, and significantly (P<.01) reduced at the 30% level. Nitrogen retention tended to be lower with the rations containing newspaper. Dry matter, organic matter and gross energy digestibility of the newspaper determined by extrapolation to 100% were 29.5, 28.4 and 24.5%, respectively.

¹ Approved by the Associate Dean as College of Agricultural Sciences Publication No. T-8-104.

² The Food and Drug Administration has not approved newspaper as a feed for livestock.

³ Present address: Hi-Pro Feeds, Inc., Hereford, Texas.