Abstract
Comparison was made between early (Wasehomare, C 535), medium (Hokuyu, Jx92) and late (Jx162, P3390) varieties on nutritive value of corn stover from 1980 through 1982 in Sorachi district Hokkaido. The stovers of late varieties were higher in dry matter and nonstructural carbohydrate content than early and medium varieties, however, no significant differences were shown in the crude protein, acid detergent lignin, TDN and digestible energy (DE) content among the varieties. As the stage of maturity advanced, digestibilities of crude protein, cell wall (CW) and cell contents (CC) decreased significantly. Value for DCP, TDN and DE in milk, doughdent, glaze and flint stages were 2.4, 1.4, 1.1 and 0.9%, 62.6, 59.6, 57.9 and 52.7% and 2.7, 2.6, 2.4 and 2.2Kcal/g.DM, respectively. The changes in the amount of digestible dry matter in corn stover was related to the amount of digestible CC and indigestible CW, however, digestible CW was observed to have less relation.
