Yumurta Tavuğu Rasyonlarina Değişik Düzeylerde Bakir Sülfat İlavesinin Karaciğer, But ve Göğüs Dokularinin Mineral İçerikleri Üzerine Etkisi

This study was conducted to determine the effects of different levels (0, 200, 250 and 300 mgCu/kg) of dietary cupper supplementation on some minerals (Cu, Zn, Fe, Mg, Ca and P) found in liver, breast and thigh tissues of laying hens. For this aim, 38-week old total 96 Lohman laying hens as 6 replicate cages each containing 4 hens, were allocated randomly to one of four dietary treatments. Treatment groups were fed diets containing (16.5% crude protein, 2670 kcal/kg ME) a standard commercial layer diet (Control), basal diet plus 200 (B-1), 250 (B-2) and 300 mgCu/kg (B-3) for 12 weeks. Dietary cupper supplementation did not affect calcium levels but altered levels of investiga- ted other minerals (Cu, Zn, Fe, Mg and P) in all tissues (liver, breast and thigh) (P<0.001). The addition of increasing levels of cupper into diets increased cupper and phosphor con- tents (P<0.001), however decreased zinc levels significantly (P<0.001) in all inspected tissues. The addition of cupper into diets increased very significantly iron levels in thigh and breast tissues while reducing iron level in liver (P <0.001). The differences between groups in terms of magnesium contents in the liver and thigh tissues were found signifi- cantly (P<0.001), and dietary cupper supplementation did not change magnesium level in thigh meat. As a result, the addition of cupper into rations for laying hens increased cupper content and reduced levels of zinc and iron in liver, the main storage site cupper, iron and zinc. This situation shows that there is such a negative relationship between these minerals.