Use of high level soybean hulls in dairy cow diet
2006
Vijittra Thongkaew(Chiang Mai University, Chiang Mai (Thailand). Faculty of Agriculture. Department of Animal Science) | Choke Mikled(Chiang Mai University, Chiang Mai (Thailand). Faculty of Agriculture. Department of Animal Science) | Visut Sirinupongsanun(Chiang Mai University, Chiang Mai (Thailand). Faculty of Agriculture. Department of Animal Science)
Twelve crossbred Holstein Friesian lactating cows were arranged according to lactating period and average milk yield into 2 treatments. All cows were fed fresh grass ad libitum and fed concentrate (16 percent CP) at the rate of one kilogram per two kilograms of milk yield. The composition of concentrate feed in group 1 contained no soybean hulls while that of group 2 had this ingredient at 60 percent of the ration. Feed were fed two times daily at the morning and afternoon milking. The feeding trial lasted 56 days. The result showed that total dry matter intake of both groups were 11.54 and 13.37 kilogram per head per day, respectively (P GT 0.05). 4 percent FCM yield, milk protein content, as well as the contents of milk lactose and solid non-fat were not significantly affected by the diets (P GT 0.05). In contrast, soybean hulls inclusion increased milk fat content (4.16 vs 3.44 percent, P LT 0.05) and milk total solid content as compared to the control (13.22 vs 12.26 percent, P LT 0.05). The feed cost per unit of milk yield (4 percent FCM) was lower (5.30 vs 6.92 Baht per kilogram, P GT 0.05) while profit from 1 kilogram of milk yield (4 percent FCM) was higher when fed with ration containing soybean hulls (8.45 vs 6.94 Baht, P LT 0.05).
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