Research Article
Effect of Dietary 1, 25-Dihydroxycholecalciferol Concentration on Growth Performance and Bone Characteristics of Japanese Quail Fed Diet Deficient in Calcium and Phosphorus

A. Sheikhlar and S. Navid

Pakistan Journal of Nutrition, 2009, 8(10), 1517-1520.

Abstract

An investigation was carried out to assay the concentration of dietary 1, 25-dihydroxycholecalciferol [1, 25(OH)₂D₃] on growth parameters and bone characteristics includes bone ash, Tibial Dyschondroplasia (TD) incidence and plasma minerals in broiler quails_. Diets comprised control diet (diet 1) with sub optimal levels of calcium (0.71%) and total phosphorus (0.37%) and diets 2, 3, 4 and 5 that contained control diet supplemented with 2.5, 4.5, 6.5 or 8.5 μg/Kg 1,25(OH)₂D₃. Dietary treatments had no effect (p>0.05) on the live weight gain and feed conversion ratio. Bone ash was increased significantly (p<0.05) by 6.5 μg/Kg 1, 25(OH)₂D₃ at 3 wk of age. Treatments effects were shown (p<0.05) on calcium of bone but there was no influence on bone’s phosphorus. The incidence and severity of TD were reduced pronouncedly (p<0.05) by 6.5 μg/Kg 1, 25(OH)₂D₃ at 3 wk of age. Plasma calcium improved significantly (p<0.05) however; plasma phosphorus did not show any differences (p>0.05) among experimental treatments. In conclusion, dietary level of 6.5 μg/Kg 1, 25(OH)₂D₃ showed positive effect on the reduction of TD in broiler quails at 3 wk of age.

ASCI-ID: 100-1032

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