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Journal of Dairy Science Vol. 80 No. 1 144-151
© 1997 by American Dairy Science Association ®
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Digestibility by Dairy Cows of Monosaccharide Components in Diets Containing Either Ground Sorghum or Sorghum Grain Treated with Sodium Hydroxide

J. Miron 1, D. Ben-Ghedalia 1, and R. Solomon 2

1 Metabolic Unit, Institute of Animal Science, Agricultural Research Organization, The Volcani Center, PO Box 6, Bet Dagan, 50250, Israel
2 Ministry of Agriculture, Extension Service, PO Box 7054, Hakirya, Tel Aviv, 61070, Israel

Five cows in midlactation and equipped with ruminal and abomasal canulas were fed two isonitrogenous diets composed of 46% sorghum grain, either ground or treated with 4% NaOH, plus 39% wheat silage and 15% supplements. The DMI were 16.3 and 15.8 kg/d for cows fed the diets containing ground sorghum and treated sorghum, respectively. The digestibility of NDF polysaccharides was higher for cows fed the treated sorghum, but the digestibility of neutral detergent soluble alpha-glucans (starch) was higher for cows fed ground sorghum. Digestibility of total carbohydrate was 79% for cows fed the diet containing ground sorghum and 67% for cows fed the diet containing sorghum treated with NaOH.

Ruminal pH was higher in cows fed the diet with treated sorghum, but total ruminal VFA concentration was higher in cows fed the diet containing ground sorghum. Profiles of individual ruminal VFA and NH3 concentration were similar for both treatments. Flow of NAN through the abomasum of cows fed ground sorghum was higher than that of cows fed the sorghum treated with NaOH, and N absorption in the intestine followed a similar trend. The data indicated a possible advantage for dairy cows fed ground sorghum than for those fed grain treated with NaOH.

Key Words: dairy cows • ground sorghum • monosaccharide digestibility • sorghum treated with sodium hydroxide

Submitted on October 26, 1995
Accepted on April 26, 1996




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R. Solomon, G. Adin, S. J. Mabjeesh, M. Nikbachat, E. Yosef, D. Ben-Ghedalia, and J. Miron
Digestibility in Lactating Cows of Diets Containing Whole Pima Treated with Sodium Hydroxide Versus Akala or Pima Cottonseed
J Dairy Sci, May 1, 2005; 88(5): 1745 - 1751.
[Abstract] [Full Text] [PDF]


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Copyright © 1997 by the American Dairy Science Association ®.