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Journal of Dairy Science Vol. 64 No. 5 792-797
© 1981 by American Dairy Science Association ®
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Effect of Sodium Hydroxide Treatment of Sorghum Silage on Lactation of Cows and on In Vitro Digestion1

Abraham W. Ghebriel, D. Wayne Kellogg and D. D. Miller

Department of Animal and Range Sciences, New Mexico State University, Las Cruces 88003

ABSTRACT

About 40 t of chopped sorghum forage (silage variety) was treated with 4% (by weight dry ) sodium hydroxide at ensiling in a plastic bag. Another 40 t of the forage was ensiled without treatment in the same bag. Early in fermentation pH was higher in treated forage, but by day 21 pH was about 4.0, and amounts of acid were similar in treated and control silage. In a feeding trial eight cows receiving treated silage after 6-wk ensiling produced 21.2 kg milk with 2.83% fat; eight cows fed control silage produced 19.9 kg milk containing 2.77% fat. Mean in vitro dry matter disappearance was 58.8 and 52.1% for weekly samples of treated and control silage. Freeze-dried samples of both treated and control silages were treated with an additional 4% sodium hydroxide and 1% nitrogen from urea (by weight dry ) in a 2 x 2 factorial arrangement. Laboratory treatment with alkali increased in vitro dry matter disappearance of dried sorghum silage and interacted significantly with nitrogen supplementation. Apparently treatment of wet sorghum forage with 4% dry sodium hydroxide produced a satisfactory feed but did not achieve maximum improvement in in vitro dry matter disappearance of the silage.

FOOTNOTES

1 Journal article 790, Agricultural Experiment Station, New Mexico State University, Las Cruces 88003.






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Copyright © 1981 by the American Dairy Science Association ®.