Abstract
The two varieties of corn, HEIGENWASE and HOKUYU were harvested at late dent stage with a corn harvester at two theoretical cuts of 5 and 10mm and ensiled in stacks, and the digestibilities and nutritve values for dairy cows were compared between 5 and 10mm cut silages. The actual cutting size was about twice as long as the theoretical value on an average, and in 5mm cut silages the ratios of over 7mm-sized ones to the total were below 50%, where-as, the ratios were 58〜65 % in 10mm cut silages. The fermentative quality of silage was better for 5mm cut silages than for 10mm cut ones. The digestibilities of starch were significantly higher for 5mm cut silages than for 10mm cut silages. There were no significant differences in the digestibilities of dry matter, organic matter and crude protein, and in the contents of DCP, TDN and DE between 5 and 10mm cut silages.
