Effect of feeding with heating roughage on copper utilizatization in goat
1997
Nakasone, K. (Kagoshima Univ. (Japan)) | Chiba, Y. | Nagasaki, Y. | Moriyama, T. | Kawamoto, Y. | Furuta, K.
Alfalfa hay cube adjusted to 50% of moisture content and heated under 70 degrees C in an oven for 96 hours, were examined to clarify the effect of heating on utilization of copper (Cu) in roughage, and Cu concentrations in blood serum, blood plasma, liver, heart, kidney and spleen of goats. Eight goats were divided into two experimental groups. The half was fed on untreated feed and the other on heat treated feed for 172 days, respectively. Blood samples from all goats were taken on 14 days before and 48, 110 and 172 days after the feeding trial started, respectively. No differences of Cu concentration between the heat-treated and untreated feeds were observed for a general wet ashing method (Nitric-perchrolic acid digesting method), whereas the concentration extracted with 1 N-HCl in the both rations wee 4.1 ppm and 9.7 ppm on dry matter basis, respectively. Cu concentration in blood plasma and liver of goats fed on heat-treated feed were clearly lower than that of goats fed on untreated feed. These results suggest that heating treatment reduce Cu solubility of roughages and Cu intake by ruminants
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