Abstract
Using breeding cows of Japanese black cattle, a palatability trial was carried out to find the varietal differences of palatability trial among sorghum silages, comparing with corn ("P 3352") silage as a control. Silage was made of six varieties of sorghum ; three sorgo-type ("Sugar graze", "FS 902" and "Tentaka"), one dual purpose-type ("Suzuho") and two grain-type ("BR 48" and "F_6-3 A-5"). Six adult cows of Japanese Black Cattle were used as a panel. Palatability of each silage was evaluated by daily dry matter intake under cafeteria feeding method, omitting repeatedly the most palatable silage day after day. All six cows in the panel significantly agreed (p<0.01) in their palatabilities for each silage. In general, palatability of breeding cows of Japanese Black Cattle for seven used silages decreased in the following order : "P 3352" (corn) > "F_6-3 A-5" ≒ "Suzuho" ≒ "BR 48" > "Sugar graze" > "FS 902" ≧ "Tentaka". Palatabilities of grain and dual purpose-type were significantly superior (p<0.01) to those of sorgo-type. However, there was no variety of sorghum superior to corn in the palatability.
