Nonruminant Nutrition: Mineral
نویسندگان
چکیده
Tribasic copper chloride (TBCC) has been shown to have better bioavailability than copper sulfate pentahydrate (CS) when fed at levels in excess of the requirement. Our objective was to determine if this relationship holds at levels below the Cu requirement. After depleting Cu levels for 7 d, 3 pens of 4 chicks/pen were fed a purified diet or a sorghumsoy diet supplemented with either 0, 1, 3, 4.5 or 6 ppm Cu. LPS was injected in order to initiate an acute phase response and bioavailability was calculated by common-intercept multiple linear regression. Prior to LPS, TBCC resulted in greater (P < 0.05) bioavailability as indicated by weight gain and tendon Cu levels with both diet types. Following LPS injection, TBCC resulted in greater bioavailability based on the plasma acute phase protein, ceruloplasmin (P = 0.01; slope ratio = 1.26). Bioavailabilities of the Cu sources did not differ for hematocrit or liver Cu. In general, these results indicate higher bioavailability of TBCC when dietary Cu is deficient in both healthy and inflammatorystressed chicks.
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تاریخ انتشار 2010