Effect of copper glycine chelate on the quality of the tibia bones in broiler chickens

• Autorzy: Kwiecien M.
• Języki publikacji: EN

Abstrakty

EN

The analyses aimed at determining the effect of administering copper in the form of glycine chelates on physical, chemical, morphometric and strength parameters of the tibia bone in broiler chickens. 300 one-day-old Ross 308 chicks were divided into 6 groups each in 5 repetitions of 10 chicks. The feed mixtures were supplemented with Cu in inorganic form (sulphate) and organic form (glycinate chelate), covering 100%, 50% or 25% of the total requirement of the component recommended for Ross 308 broiler chicks. The basic feed mixtures contained: starter 6.1 mg·kg1 Cu, grower 6.21 mg·kg⁻¹ Cu and finisher 5.91 mg·kg⁻¹ Cu. After the chickens were sacrificed, the tibiae bone were isolated, weighed, measured and frozen for further mechanical analysis. An Instron Universal Testing Machine (Model 3369) was used to determine bone ultimate strength and maximum elastic strength. The geometric properties bones (cross-section area, second moment of interia, mean relative wall thickness) and cortical indexes (cortical layer, cortical index, cortical surface, cortical surface index) of were estimated on the basis of measuring the external and internal horizontal and vertical axes in the cross section of the bones at the site of fracture. Degreased and dried to constant weight was bone mineralization in a muffle furnace and mineral content was determined. On the 42nd day higher, statistically (P ≤ 0.01), confirmed bone weight per 100 g of body weight was recorded in chickens administered a supplement of Cu-Gly. amounting to 100%, 50% and 25%, as well as S-Cu amounting to 50% and 25% of the demand, compared with chickens given the recommended dose of Cu in the form of its sulphate. The levels of both organic and inorganic Cu compounds had a significant effect on the geometrical parameters of the bones, i.e. Ix and A. The lowest values of the analyzed properties were observed with the use of Cu-S amounting to 100%. The highest values of dy and Wf/A were recorded in the group of chickens receiving an addition of Cu in its organic form, covering the demand in 50%. Supplementation with Cu in its organic form resulted also in a significantly higher index of bone density. Lowering the amount of Cu to 25% of the demand in the form of a chelate resulted in a significant (P ≤ 0.05) increase in Fe concentration, in reference to the recommended doses of Cu-Gly. and Cu-S at the level of 2 mg·kg⁻¹, respectively, by 14% and 11%. The results of the research permitted us to claim that Cu-Gly. may be used as an alternative for sulphates. Administering 4 or even 2 mg·kg⁻¹ in the form of glycine compounds did not lead to lower bone quality, and it even increased the value of certain parameters.

• Wydawca: -
• Czasopismo: Medycyna Weterynaryjna
• Rocznik: 2013
• Tom: 69
• Numer: 08
• Opis fizyczny: p.492-498,ref.

Twórcy

autor

Kwiecien M.

• Institute of Animal Nutrition and Bromatology, Faculty of Biology and Animal Breeding, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland

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