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Shefet, G., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Ben-Ghedalia, D., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Cotton straw (CS) was treated with ozone and sodium hydroxide and the effect of the treatments on the in vitro digestibility of monosaccharides in the whole material and in cell walls was studied. The digestibility of the major components - glucose and xylose in the untreated whole material was low, 26.3 and 14.3%, respectively, whereas that of the minor components was high, in the range of 60-70%. Ozonation resulted in an increase in digestibility of most of the sugars, with a particular effect on glucose and xylose, the digestibility of which was raised to 72 and 67%, respectively. Sodium hydroxide exerted a modest effect, increasing the in vitro digestibility values for glucose to 35.7% and for xylose to 32.3%. The digestibility of glucose, xylose and uronic acids in the cell wall of the untreated material was 19.7, 8.73 and 21.9%, respectively, whereas the values for the minor components ranged between 50 and 60%. The ozone treatment increased the in vitro degradability of the residual glucose, xylose and uronic acids to 63.7, 26.3 and 53.5%, respectively. There was a lag time of between 12 and 24 h before the rumen bacteria started to hydrolyse the cell wall glucose, xylose and uronic acids. The lag time for those cell wall sugars in the ozonated CS was the longest (24 h) but their rate of in vitro digestion during the last 24 h was higher in the ozonated than in the untreated or sodium hydroxide-treated cotton straw. The practical implications of the above-mentioned findings are discussed. © 1982 Springer-Verlag.
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Effect of ozone and sodium hydroxide treatments on the degradability of cotton straw monosaccharides by rumen microorganisms
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Shefet, G., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Ben-Ghedalia, D., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Effect of ozone and sodium hydroxide treatments on the degradability of cotton straw monosaccharides by rumen microorganisms
Cotton straw (CS) was treated with ozone and sodium hydroxide and the effect of the treatments on the in vitro digestibility of monosaccharides in the whole material and in cell walls was studied. The digestibility of the major components - glucose and xylose in the untreated whole material was low, 26.3 and 14.3%, respectively, whereas that of the minor components was high, in the range of 60-70%. Ozonation resulted in an increase in digestibility of most of the sugars, with a particular effect on glucose and xylose, the digestibility of which was raised to 72 and 67%, respectively. Sodium hydroxide exerted a modest effect, increasing the in vitro digestibility values for glucose to 35.7% and for xylose to 32.3%. The digestibility of glucose, xylose and uronic acids in the cell wall of the untreated material was 19.7, 8.73 and 21.9%, respectively, whereas the values for the minor components ranged between 50 and 60%. The ozone treatment increased the in vitro degradability of the residual glucose, xylose and uronic acids to 63.7, 26.3 and 53.5%, respectively. There was a lag time of between 12 and 24 h before the rumen bacteria started to hydrolyse the cell wall glucose, xylose and uronic acids. The lag time for those cell wall sugars in the ozonated CS was the longest (24 h) but their rate of in vitro digestion during the last 24 h was higher in the ozonated than in the untreated or sodium hydroxide-treated cotton straw. The practical implications of the above-mentioned findings are discussed. © 1982 Springer-Verlag.
Scientific Publication
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