Evaluation of the zootechnical additive SUBTILPROBIO® C-31 on feeding of laying hens in a commercial production unit
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Abstract
In order to determine the probiotic effect of this zootechnical additive, liveweight, intake, conversion, total production of eggs and cracked eggs, and total disqualified eggs, as well as mortality, death by pecking, cannibalism and viability were evaluated. Results showed that hens consumed the zootechnical additive had a higher increase of productive indicators like liveweight (1640.0g/1585.0g), intake (10780 kg-1 DM), conversion (1.92/2.10), egg production (15,540/15,397), cracked eggs (1,092/1,114) and disqualified eggs (69/76) for P<0.01 regarding control group. In other indicators like mortality (1/4), viability (99.6/98.6 %) and death by pecking/cannibalism (1/2), there are no differences among
treatments. Results of this research demonstrate feasibility of the use of this zootechnical additive as improver of productive and health indicators for this category.
Key words: zootechnical additives, endospores of Bacillus subtilis, laying hens, eggs
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