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Journal of Biological Sciences

Year: 2008 | Volume: 8 | Issue: 2 | Page No.: 328-334
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Authors

H. Nassiri Moghaddam

R. Jahanian

H. Jahanian Najafabadi

M.M. Madaeni

Keywords

Research Article

Influence of Dietary Zeolite Supplementation on the Performance and Egg Quality of Laying Hens Fed Varying Levels of Calcium and Nonphytate Phosphorus

H. Nassiri Moghaddam, R. Jahanian, H. Jahanian Najafabadi and M.M. Madaeni
Natural zeolites have been shown to influence calcium and phosphorus utilization in laying hens. A 4x2 factorial arrangement of treatments was used to investigate the effects of dietary inclusion of zeolite (0, 1.5, 3 and 4.5% of diet) into the diets with sufficient or deficient Ca (3.26 and 2.45%) and non-phytate P (0.25 and 0.19%) contents on egg performance and egg quality parameters of 28 week-old Hy-Line (W-36) Leghorn hens. The trial lasted 98 days (2 week adaptation and 12 week recording periods), when the hens were 42 week-old. Significant dietary effects of feeding zeolite were observed for hen-day egg production, egg mass, egg weight, Haugh score and shell thickness at the initial 6 weeks of recording period, while dietary zeolite supplementation tended to/or had no significant effects on studied parameters at the second 6 weeks of experimental period. Dietary added zeolite caused a significant increases in egg weight (p<0.05) and egg production and egg mass (p<0.01). Hen-day egg production and egg mass at the second 6 weeks of recording period were significantly improved (p<0.01) by feeding low non-phytate P (NPP) diets. There was a significant interaction between NPP level and added zeolite for egg production (36 to 42 weeks of age), egg weight and eggshell thickness (30 to 36 weeks of age) and egg mass. Dietary Ca level interacted with P level for shell thickness, eggshell percentage and shell ash, so that the given parameters were affected by Ca:NPP ratio other than dietary Ca and NPP contents. In general, the present findings indicate that dietary inclusion of zeolite up to 1.5% has a potential to improve laying performance, particularly eggshell quality.
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How to cite this article

H. Nassiri Moghaddam, R. Jahanian, H. Jahanian Najafabadi and M.M. Madaeni, 2008. Influence of Dietary Zeolite Supplementation on the Performance and Egg Quality of Laying Hens Fed Varying Levels of Calcium and Nonphytate Phosphorus. Journal of Biological Sciences, 8: 328-334.

DOI: 10.3923/jbs.2008.328.334

URL: https://scialert.net/abstract/?doi=jbs.2008.328.334

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