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Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 1988;1(4): 209-212.
https://doi.org/10.5713/ajas.1988.209    Published online December 1, 1988.
Overcoming the nutritional limitations of rice straw for ruminants 2. Response of growing sahiwal and local cross heifers to urea upgraded and urea supplemented straw
J. B. Schiere, J. Wieringa
Thirty-six heifers of three different breeds were fed rice straw, either upgraded with 4% urea, of supplemented with 2% urea, sprayed on the straw just prior to feeding. The effects on liveweight gain and dry matter intake were measured for pure Sahiwal heifers, Sahiwal x local crosses and Jersey x local crosses. Urea upgraded straw gave better growth than urea supplemented straw, average 217 g/day/animal versus 71 g/day/animal. This was associated with a higher intake of upgraded straw, compared to supplementation straw (2.4 versus 1.8 kg/100 kg BW). No overall breed effect on growth was found (P>0.05).
Keywords: Rice Straw; Urea Supplementation; Sahiwals; Growing Heifers

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