Biological efficacy of l‐lysine preparations containing biomass compared to l‐lysine‐HCl

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Abstract
In two growth experiments on broilers of 6 to 27 days of age, the biological efficacy of three L‐lysine preparations containing biomass was evaluated in comparison to L‐lysine‐ HCl. L‐lysine from the different sources was added in graded levels to a basal diet deficient in lysine, but adequate in all other nutrients. From multi‐exponential regression analysis of weight gain and feed conversion responses, biological efficacy of the three L‐lysine preparations containing biomass was estimated to be 97%, 103%, and 113%, respectively. None of these estimates was significantly different from 100% Thus, it is concluded that the efficacy of the L‐lysine preparations to deliver lysine is equivalent to L‐lysine‐ HCl.