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. <br /> 1014iDEPARTMENT OF DAIRY SCIENCE <br /> UNIVERSITY OF WISCONSIN - MADISON <br /> i <br /> 266 Animal Sciences Building <br /> i Madison,WI 53706 <br /> Phone 608-263-3308 <br /> August 7, 1989 <br /> Mr. George Tyson, President <br /> Xylan, Inc. <br /> 505 Science Drive <br /> Madison, Wi 53711 <br /> Dear George: <br /> II <br /> Enclosed is a summary of the effects of the Xylan alkaline hydrogen <br /> peroxide (AHP) treatment on ruminal digestion of various feeds. <br /> AHP treated and untreated brewers grains, oat hulls, corn cobs, soy <br /> hulls and peanut hulls were placed in dacron bags and suspended in <br /> the rumens of dairy cows for 0, 12, 24 and 48 hours. The bags <br /> containing each feed were then removed from the rumen, rinsed and <br /> dried. The material remaining in each bag was then measured. The <br /> attached graphs show the amount of each feed that was digested in <br /> the rumen at each time point. <br /> These experiments suggest that the Xylan AHP treatment process <br /> increased both rate and extent of ruminal digestion of brewers <br /> grains, corn cobs and oat hulls. It appears that AHP treatment <br /> significantly improves the quality of these feeds for ruminants. AHP <br /> treatment did not appear to alter the digestion of soy hulls or peanut <br /> hulls. This should not be surprising, since previous research has <br /> shown that alkali treatment has little effect on the digestibility of <br /> legumes. <br /> These experiments suggest that the Xylan AHP process can <br /> significantly improve ruminal digestion of residues from temperate <br /> grasses (brewers grains, oat hulls and corn cobs). Of the feeds tested, <br /> brewers grains may have the greatest potential as an improved crop <br /> tliw <br />