University of California

Comfrey as a feed for swine


Hubert Heitman
Sergio E. Oyarzun

Authors Affiliations

Hubert Heitman, Jr. is Professor, Department of Animal Science, University of California, Davis; Sergio E. Oyarzun, graduate student, is now Associate Professor, Swine Husbandry, University of Chile, Santiago. Financial support was received from the Chevron Chemical Co., San Francisco.

Publication Information

Hilgardia 25(1):7-8. DOI:10.3733/ca.v025n01p7. January 1971.

PDF of full article, Cite this article


Under the conditions of these experiments, dehydrated comfrey was not a suitable ingredient for a laboratory rat ration at the 20% level, where it supplied half of the protein, and it was completely unsatisfactory at the 40% level. The swine digestion trial indicated that the comfrey used had a dry matter content of 12.1% digestible crude protein, and 52.7% TDN content. The ratings for crude protein, total digestible nutrient content and nitrogenfree extract were all lower for comfrey than for the control ration.

Heitman H, Oyarzun S. 1971. Comfrey as a feed for swine. Hilgardia 25(1):7-8. DOI:10.3733/ca.v025n01p7
Webmaster Email: sjosterman@ucanr.edu