title: Effects of dietary boron and phytase supplementation on growth performance and mineral profile of broiler chickens fed on diets adequate or deficient in calcium and phosphorus.
abstract: 1. Two experiments were designed to determine the effect of dietary boron (B) in broiler chickens. In Experiment 1, a 2 × 4 factorial arrangement of treatments was used to investigate the effect of dietary calcium (Ca) and available phosphorus (aP) (adequate or deficient) and supplemental B (0, 20, 40, and 60 mg/kg diet). In Experiment 2, B, at 20 mg/kg, and phytase (PHY) (500 FTU/kg diet) were incorporated into a basal diet deficient in Ca and aP, either alone or in combination. 2. The parameters that were measured were growth performance indices, serum biochemical activity as well as ash and mineral (i.e. Ca, P, Mg, Fe, Cu and Zn) content of tibia, breast muscle and liver. 3. Results indicated that both supplemental B and dietary Ca and aP had marginal effects on performance indices of chickens grown for 42 d. 4. There were positive correlations (linear effect) between B concentrations of serum, bone, breast muscle and liver and the amount of B consumed. 5. Serum T3 and T4 activities increased linearly with higher B supplementation. 6. Increasing supplemental B had significant implications on breast muscle and liver mineral composition. Lowering dietary Ca and aP level increased Cu content in liver and both Fe and Zn retention in breast muscle. Tibia ash content and mineral composition did not respond to dietary modifications with either Ca-aP or B. 7. The results also suggested that dietary contents of Ca and aP do not affect the response to B regarding tissue mineral profile. Dietary combination with B and PHY did not create a synergism with regard to growth performance and bioavailability of the minerals.
authors.affiliation: a Erbeyli Poultry Research Institute , Aydın , Turkey.
authors.forename: M
authors.initials: M
authors.lastname: Çinar
authors.affiliation: b Faculty of Agriculture, Department of Animal Science , Eskişehir Osmangazi University , Eskişehir , Turkey.
authors.forename: K
authors.initials: K
authors.lastname: Küçükyilmaz
authors.affiliation: a Erbeyli Poultry Research Institute , Aydın , Turkey.
authors.forename: M
authors.initials: M
authors.lastname: Bozkurt
authors.affiliation: a Erbeyli Poultry Research Institute , Aydın , Turkey.
authors.forename: A U
authors.initials: AU
authors.lastname: Çatli
authors.affiliation: a Erbeyli Poultry Research Institute , Aydın , Turkey.
authors.forename: E
authors.initials: E
authors.lastname: Bintaş
authors.affiliation: c Faculty of Veterinary, Department of Biochemistry , Balıkesir University , Balıkesir , Turkey.
authors.forename: H
authors.initials: H
authors.lastname: Akşit
authors.affiliation: a Erbeyli Poultry Research Institute , Aydın , Turkey.
authors.forename: R
authors.initials: R
authors.lastname: Konak
authors.affiliation: d Faculty of Agriculture, Department of Agricultural Biotechnology , Adnan Menderes University , Aydın , Turkey.
authors.forename: Ç
authors.initials: Ç
authors.lastname: Yamaner
authors.affiliation: e Faculty of Medicine, Department of Medicinal Biochemistry , Balıkesir University , Balıkesir , Turkey.
authors.forename: K
authors.initials: K
authors.lastname: Seyrek
mesh_terms: D010832:6-Phytase / Q000008:administration & dosage / Q000378:metabolism*; D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena / Q000187:drug effects*; D000818:Animals; D001774:Blood Chemical Analysis / Q000662:veterinary; D015519:Bone Density / Q000187:drug effects; D001895:Boron / Q000008:administration & dosage / Q000378:metabolism*; D002645:Chickens / Q000254:growth & development / Q000502:physiology*; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements / Q000032:analysis; D004305:Dose-Response Relationship, Drug; D005260:Female; D008099:Liver / Q000737:chemistry / Q000187:drug effects; D008297:Male; D008903:Minerals / Q000032:analysis / Q000378:metabolism; D010369:Pectoralis Muscles / Q000737:chemistry / Q000187:drug effects; D011897:Random Allocation; D013977:Tibia / Q000737:chemistry / Q000187:drug effects
chemical_list: D008903:Minerals; C028705:bone ash; D010832:6-Phytase; D001895:Boron