Seasonal Changes in the Lignin and Cellulose Content of Some Montana Grasses

Lignin and cellulose were determined in five species of grass, at five different stages, and in two localities in Montana. Lignin increased with advancing season, from about five per cent in May to eighteen per cent in September, with considerable species difference. Lignin content closely paralleled cellulose content. Grasses in a more arid region reached the maximum lignin values earlier in the season. Fairway crested wheatgrass contained less lignin than the standard variety, and slender wheatgrass contained less lignin than either. Mountain brome contained less lignin than smooth brome. Lignin is believed to be of definite value in predicting the feeding value of forage plants.