BIOLOGICAL EFFICACY OF L-LYSINE PREPARATIONS CONTAINING BIOMASS COMPARED TO L-LYSINE-HCL

In two growth experiments on broilers of 6 to 27 days of age, the biol ogical efficacy of three L-lysine preparations containing biomass was evaluated in comparison to L-lysine.HCl. L-lysine from the different s ources was added in graded levels to a basal diet deficient in lysine, but adequate in all other nutrients. From multi-exponential regressio n analysis of weight gain and feed conversion responses, biological ef ficacy of the three L-lysine preparations containing biomass was estim ated to be 97% 103% and 113% respectively. None of these estimates was significantly different from 100% Thus, it is concluded that the effi cacy of the L-lysine preparations to deliver lysine is equivalent to L -lysine.HCl.