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Journal of Dairy Science Vol. 65 No. 3 390-395
© 1982 by American Dairy Science Association ®
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Effects of Sodium Hydroxide Treatment on Nutritive Value of Screened Manure Solids Fed to Dairy Cattle1

L. E. Armentano and A. H. Rakes

Department of Animal Science, North Carolina State University, Raleigh 27650

ABSTRACT

This trial was to identify an effective method of increasing the nutritive value of screened manure solids by treatment with sodium hydroxide and to evaluate the effectiveness of this treatment. Treatments were applied in a 5 x 3 factorial design with five percentages of sodium hydroxide and three storage times. Treatment was followed by fiber analysis and in vitro digestibility determination. Based on this information three rations were formulated to contain 22% of screened manure solids either untreated, treated to contain 7% sodium hydroxide and fed immediately, or treated to contain 7% sodium hydroxide and stored 7 days prior to feeding. Chemical composition, intake, and digestibility of these complete rations were measured in a trial of 12 nonlactating, nonpregnant Holstein cows. Treatment reduced the hemicellulose content of the screened manure solids and increased digestibility of crude fiber and cellulose in the complete rations. Storage of treated material depressed digestibility of crude protein and soluble carbohydrate. Intake of organic matter was not different among the three rations. Untreated screened manure solids can be used successfully in complete rations for dairy cattle, but treatment with sodium hydroxide does not appear to be justified.

FOOTNOTES

1 Paper No. 6665 of the Journal Series of North Carolina Agricultural Research Service, Raleigh.






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Copyright © 1982 by the American Dairy Science Association ®.