Effects of dietary boron on performance, egg production, egg quality and some bone parameters in layer hens
| Autor: | Uğur Yildirim, Engin Yenice, Cengizhan Mizrak, M Can, Zafer Atik |
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| Rok vydání: | 2010 |
| Předmět: |
Haugh units
inorganic chemicals medicine.medical_specialty Phosphorus Calcium phosphorus fowls bone strength Haugh units tibia chemistry.chemical_element bone strength Calcium Endocrinology Animal science fowls chemistry Internal medicine medicine Animal Science and Zoology Composition (visual arts) Femur Dietary Boron Tibia phosphorus Food quality Boron tibia |
| Zdroj: | South African Journal of Animal Science; Vol 40, No 3 (2010); 257-264 South African Journal of Animal Science, Volume: 40, Issue: 3, Pages: 257-264, Published: 2010 Scopus-Elsevier |
| ISSN: | 2221-4062 0375-1589 |
| DOI: | 10.4314/sajas.v40i3.10 |
| Popis: | In this study dietary boron at different doses (0, 25, 50, 100 and 200 mg/kg feed) was supplemented to layers from 4 to 64 weeks of age. There was no significant difference between treatments with respect of mortality, egg production, egg weight, egg mass and cracked eggs. Significant increases were observed in body weight as age rose. Body weight was not affected by dietary boron supplementation at 16 and 40 weeks of age. At 64 weeks of age boron additions of 50, 100 and 200 mg/kg to the diet resulted in significant lower body weights than that of the control group. Egg quality parameters; albumen height and Haugh units, were improved when 25 or 50 mg boron/kg diet was supplemented above the other treatments. Shape index, shell thickness, shell breaking strength were not affected by treatments, though 25 mg boron/kg diet tended to increase shell breaking strength. Tibia bone strength and phosphorus content in the tibia and femur were not affected by boron supplementation. Boron supplementation at 25 and 50 mg/kg significantly increased femur bone strength, and ash and calcium content of the tibia and femur bones. Concentration of boron in bone increased with the increase in dietary boron. Keywords: Calcium, phosphorus, fowls, bone strength, Haugh units, tibia |
| Databáze: | OpenAIRE |
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