Eleven forage sorghum cultivars and one
grain sorghum hybrid were used to determine
the effect of individual plant parts on in vitro
dry matter digestibility (IVDMD) of sorghum
silage. IVDMD was highest for the head and
lowest for the leaf sheath. When head and
leaf blade parts were added to whole-plant
material, IVDMD increased. When leaf
sheath and stalk parts were added, IVDMD
decreased, with the greatest decrease for leaf
sheath. These results are consistent with an
earlier study in our laboratory.