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Interactive effects of dietary copper and water copper level on growth, water intake, and plasma and liver copper concentrations of poults

Ward, T.L.; Watkins, K.L.; Southern, L.L.

Poultry Science 73(8): 1306-1311

1994


ISSN/ISBN: 0032-5791
PMID: 7971675
DOI: 10.3382/ps.0731306
Accession: 002414952

The interactive effects of dietary Cu and water Cu on poult growth, water intake, whole-blood hemoglobin (Hb), and plasma and liver Cu concentrations were investigated using 232 9-d-old toms. Poults were randomly assigned to two levels of dietary Cu (Basal (B) and B + 204 mg Cu/kg diet) and to four levels of water Cu (0, 51.5, 103, and 206 mg Cu/kg water) in a 2 times 4 factorial arrangement of treatments. Each treatment was replicated six times. All poults received tap water during Days 1 to 5 followed by the water Cu treatments during Days 6 to 10. Water intake was measured daily and gain and feed intake were determined on Days 5 and 10. Day 1 to 5 gain was reduced (P lt .02) in poults fed supplemental dietary Cu. Day 1 to 5 feed intake and gain:feed and Day 6 to 10 gain, feed intake, gain:feed, and water intake were not affected (P gt .10) by dietary Cu. Liver Cu concentration was increased (P lt .01) in poults fed supplemental dietary Cu, but Hb and plasma Cu concentrations were not affected (P gt .10) by dietary Cu level. Day 6 to 10 gain, feed intake, gain:feed, and daily water intake were decreased (quadratic effect, P lt .01) in poults fed supplemental water Cu. Plasma Cu concentration was increased (linear effect, P lt .04) in poults fed supplemental water Cu, but Hb concentration was not affected (P gt .10) by water Cu. Liver Cu concentration was increased more in poults receiving both supplemental dietary Cu and water Cu than in poults receiving either Cu source alone (dietary Cu by water Cu quadratic, P lt .10). Addition of 206 ppm supplemental Cu to the water decreased poult growth and water intake. Supplementation of feed and water with Cu increased liver Cu accumulation in poults, and the effect was greater when feed and water Cu were provided simultaneously.

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