 | Abstract 678MULTINUTRIENT BLOCKS (MUB) AS SUPPLEMENT FOR MILKING COWS FED FORAGES OF LOW NUTRITIVE VALUE IN SOUTH VIETNAMBui Xuan An, Luu Trong Hieu and T R Preston* University of Agriculture and Forestry, Thu Duc, Ho Chi Minh City, Vietnam *Centro para la Investigacion en Sistemas Sostenibles de Produccion Agropecuaria (CIPAV) AA20591 Cali, Colombia Livestock Research for Rural Development 1993 5(1): 66-70. Two experiments were carried out, at An Phuoc state farm and on private small farms, to determine animal response, farmer acceptance and the benefits of supplementing MUB to crossbred Holstein cows. On 3 smallholder farms, seven milking cows fed rice straw, native grasses and concentrates were supplemented with 1 kg MUB (5% urea) for 40 days. Milk yield, milk fat content before and after supplementation were: 7.17 kg/cow/day and 3.4% fat; and 8.17 kg/cow/day and 3.9% fat, respectively. On the State farm, 10 cows were divided into two groups: a control group fed poor quality grasses, crop by-products and concentrate as the basal diet, and an experimental group fed the basal diet plus 1kg MUB (10% urea)/cow/day. The experiment lasted 140 days. Milk yield was significantly increased (P<0.001) by 17% by feeding MUB. This abstract relates to the following species:
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