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Effects of a Hemiacetal of Chloral and Starch on Methane Production and Energy Balance of Sheep Fed a Pelleted Diet¹

University of Illinois at Urbana-Champaign,² Urbana 61801

Abstract

A HEMIACETAL of chloral and starch (HCS) incorporated into a pelleted 40% roughage diet to supply approximately 2.2 g/sheep/day, inhibited from 50 to 82% of the CH₄ production in a 4 x 4 latin square experiment with 20 to 40 kg ram lambs. The basal diet was fed at two levels of intake, approximately 1.0 and 2.1 x maintenance, each with and without inhibitor. Energy losses as H₂ averaged 1.65% of GE when HCS was fed but overall gas energy losses were reduced by an average of 2.7% of the GE (P<.01). Percent ME was increased significantly (P<.05) by an average of 2.7% with the increase being larger at lower intakes of the basal diet. DE, gas energy and ME as a percent of GE were all significantly affected by level of dietary intake except percent ME on the control which was not affected, this being a significant (P<.05) treatment x intake level interaction.

Heat production and retained energy values indicated that the utilization of ME from the HCS diet by the sheep for maintenance and gain was at least equal to the control diet. The equation expressing this utilization is: RE (kcal/day/kg^0.75)=0.492 ME (kcal/day/kg^0.75)–43.1.

¹ Supported in part by a grant from Smith Kline & French Laboratories, Philadelphia, Pa.

² Department of Animal Science.