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Relationship of Lignification to In Vitro Cellulose Digestibility of Grasses and Legumes¹

Ohio Agricultural Experiment Station, Wooster⁴

Abstract

The digestibility of forage cellulose in the artificial rumen has been compared with lignin content of four grasses and three legumes cut at three stages of maturity. Lignin content was negatively correlated with in vitro cellulose digestibility at the 12-hr. time period for grasses and legumes, although the regression equations for the two groups were significantly different. Lignification was linearly related to cellulose digestibility as the grasses matured; however, this relationship did not exist for alfalfa.

¹ Approved for publication as Journal Article No. 114-64 by the Associate Director of the Ohio Agricultural Experiment Station, Wooster. This work was supported in part by funds allocated on recommendation of the North Central Technical Committee (NC-25) for Factors Affecting the Utilization of Feed by Ruminants.

² Present address: Experimental Farm, Canada Department of Agriculture, Prince George, British Columbia.

³ The senior author wishes to express his appreciation to the associate authors and the Ohio Agricultural Experiment Station for a postdoctoral fellowship during the course of this work.

⁴ Department of Animal Science.