NM 05. Effects of liquid streptomyces solubles at two levels on digestibility in pigs using acid detergent insoluble ash as an indicator

Abstract

The industrial byproduct of microbiological antibiotic production, liquid streptomyces solubles (LSS), was included at levels of 0, 0.45 and 0.90 % of the dry matter in diets fed at three stages of life (starting, growing and finishing). A small proportion of rice hulls was also added to the diets, which were based mainly on maize, soybean meal and fishmeal, to facilitate the use of acid detergent insoluble ash as an internal indicator. Six Yorkshire pigs were used in a 3 x 3 latin square design, replicated twice. Inconsistent effects of LSS on apparent digestibility were observed, being negative at the lower level of inclusion, but positive, at least during the first stage, at the higher level of inclusion, with mean values of 77.3, 75.3 and 83.5 %; 84.9, 82.9 and 83.33 % ; and 87.5, 84.2 and 86.2 % in the three consecutive stages a the 0, 0.45 and 0.90 % LSS levels, respectively.