caa a22 4500 397568312 CHVBK 20180308164834.0 cr unu---uuuuu 161202e199609 xx s 000 0 eng 10.3382/ps.0751086 doi (NATIONALLICENCE)oxford-10.3382/ps.0751086 Studies on the Feeding of Cupric Sulfate Pentahydrate and Cupric Citrate to Broiler Chickens [Elektronische Daten] [GENE M. PESTI, REMZI I. BAKALLI] Male commercial broiler strain chickens were fed either a control diet (based on corn and soybean meal) or the control diet supplemented with cupric sulfate pentahydrate or cupric citrate in seven experiments (six in floor pens, one in wire-floored batteries). In Experiment 1, feeding 125 or 250 mg/kg copper increased growth (4.9%) and decreased feed conversion ratios (3.4%), total plasma cholesterol (40.2%), and breast muscle cholesterol (37.0%). Feeding 375 mg/kg copper was without further beneficial effect. In Experiment 2, withdrawing growth promoting supplements of copper from the feed for the last 7 d caused a significant (P < 0.05) increase in breast muscle cholesterol at 42 d of age: 57.2, 48.0, and 43.2 mg/100 g meat for birds supplemented for 0, 35, or 42 d, respectively. Feeding 10 vs 260 mg/kg copper caused only small increases in tissue copper levels: 0.36 vs 0.41 mg/kg for breast meat, and 0.48 vs 0.60 mg/kg for thigh meat, respectively. Litter copper accumulations in these experiments were similar to those of earlier reports. Breast muscle cholesterol was reduced by feeding 125 mg/kg supplemental copper from cupric citrate (27.84 mg/100 g) or 125 mg supplemental copper from cupric sulfate pentahydrate (25.32 mg/100 g) compared to broilers fed the control diet (43.92 mg/100 g). Cupric citrate was efficacious for growth promotion at lower copper levels than cupric sulfate pentahydrate, resulting in reduced litter copper. © 1996 Poultry Science Association, Inc. Metabolism and Nutrition nationallicence copper nationallicence broiler nationallicence cholesterol nationallicence PESTI GENE M. aut BAKALLI REMZI I. aut Poultry Science Oxford University Press 75/9(1996-09), 1086-1091 0032-5791 75:9<1086 1996 75 ps https://doi.org/10.3382/ps.0751086 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.3382/ps.0751086 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- PESTI GENE M. aut NATIONALLICENCE 700 1- BAKALLI REMZI I. aut NATIONALLICENCE 773 0- Poultry Science Oxford University Press 75/9(1996-09), 1086-1091 0032-5791 75:9<1086 1996 75 ps Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford