D. M. Hooge
Hooge Consulting Service, Inc., Eagle Mountain, Utah, USA
J. L. Pierce
Alltech, Inc., Nicholasville, Kentucky, USA
K. W. McBride
Alltech, Inc., Nicholasville, Kentucky, USA
P. J. Rigolin
Alltech, Inc., Nicholasville, Kentucky, USA
ABSTRACT
A statistical meta-analysis was conducted using results from 16 laying hen trials (1995-2008; plus some undated reports) from several countries to demonstrate effects of a dietary enzyme complex (+SSF; Allzyme® SSF, Alltech, Inc., Nicholasville, Kentucky USA) versus no supplement (nCON, negative control) on 6 performance parameters. The paired t-test (Statistix 8, Analytical Software, Tallahassee, Florida USA) was used in the statistical analysis. A total of 26 comparisons from 16 trials were possible for hen-day egg production, egg weight and daily egg mass production and 24 comparisons from 14 trials were possible for daily feed intake, feed/dozen eggs and kg feed/kg eggs. Overall averages for the parameters were calculated and levels of significance (p-values) were given. The inclusion rates for the enzyme product in the diets was listed. Hen-day egg production was numerically (p = 0.136) improved by 1.09% actual (+1.29% relative) for +SSF compared to nCON diets. Egg weight was significantly (p = 0.006) greater for eggs from hens fed +SSF rather than nCON diets (+0.89 g or +1.49%). Daily egg mass produced was significantly greater (p = 0.014) for +SSF than for nCON fed hens (+1.74 g/hen/day or +3.47%). Feed intake was numerically (p = 0.281) lowered by 0.50 g/hen daily (-0.44%) by using +SSF diets compared to nCON diets. Feed/dozen eggs was significantly (p = 0.028) reduced by 0.027 kg/dozen (1.65%) and kg feed/kg eggs was significantly (p = 0.004) reduced by 0.069 (3.04%) for +SSF diets compared to nCON diets. Enzyme supplementation (Allzyme® SSF) at 150 g/tonne of feed is recommended to improve the egg weight, daily egg mass and feed conversion ratios of laying hens.
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How to cite this article
D. M. Hooge, J. L. Pierce, K. W. McBride and P. J. Rigolin, 2010. Meta-analysis of Laying Hen Trials Using Diets With or Without Allzyme® SSF Enzyme Complex. International Journal of Poultry Science, 9: 824-827.
DOI: 10.3923/ijps.2010.824.827
URL: https://scialert.net/abstract/?doi=ijps.2010.824.827
DOI: 10.3923/ijps.2010.824.827
URL: https://scialert.net/abstract/?doi=ijps.2010.824.827
REFERENCES
- Sundu, B., A. Kumar and J. Dingle, 2004. The effect of levels of copra meal and enzymes on bird performance. Proceedign of the 16th Annual Australian Poultry Science Symposium, Feb. 9-11, Sydney, New South Wales, Australia, PP: 52-54.
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