科研之友
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摘要
In an effort to improve broiler performance in an environment with increasing feed costs, researchers have investigated broiler breeder diet modification as a nontraditional way to improve broiler performance without affecting broiler feed costs. Broiler breeder diet modification of vitamins and minerals has received considerable attention, but feeding hens yeast fermentation products to affect progeny is an under-researched area. In this study, Cobb 500 broiler breeder hens were allocated to floor pens and fed mash diets (from 20 wk onward) with or without a Saccharomyces cerevisiae fermentation product. Hens were artificially inseminated from male broiler breeders fed diets devoid of S. cerevisiae. Progeny were evaluated from hatches at 32 and 39 wk of age. Hens fed S. cerevisiae had a reduction in egg contamination in the 32-wk hatch (1.97 to 0.00% contaminated eggs), but not the 39-wk hatch. Hatchability of fertile eggs was improved in hens fed diets containing S. cerevisiae in both the 32-and 39-wk hatch (overall 3.58% improvement in percentage hatch of fertile eggs). Other egg break-out assessments did not differ between treatments, but progeny from hens fed S. cerevisiae had improved feed conversion and breast meat yield in the 39-wk hatch (24.24 vs. 26.19% total white meat yield), but not the 32-wk hatch. Future research should be conducted to assess the nutrient content of eggs from broiler breeder hens fed this S. cerevisiae fermentation product in addition to further assessing progeny performance.
- 出版日期2013-12
