performance and initial methane production were evaluated in growing
and finishing pigs. Assay-1was carried in experimental facilities. Sixty
pigs, 30 barrows and 30 gilts (26.07 ± 0.07 kg), were allotted randomly
to treatments arranged in a 3 x 2 factorial design with 3 diets:
Control, B. subtilis and lincomycin, and 2 genders. Assay-2, 48 pigs
(26.06 ± 3.10 kg) were maintained in commercial farm and supplemented
with B. subtilis and lincomycin. Performance and initial methane
production were measured. Assay-3, 12 barrows (BW = 26.55 ± 1.25 kg)
were housed in metabolism crates and fed control and B. subtilis diet to
evaluate nutrient balance and energy. Gilts within experimental
facility, fed control diet, had higher ADG (P < 0.05) compared to
lincomycin diet, but there was no statistical difference with B.
subtilis diet. Numeric variations on first and second assays suggested
some improvement on pig performance and a reduction on initial methane
production when pigs were fed B. subtilis diet, compared with lincomycin
diet. Protein digestibility increased (P < 0.05) with B. subtilis
supplementation in the diet. Dietary supplementation with B. subtilis
for growing and finishing pigs may improve performance and decrease N
excretion and initial methane production.
Keywords: Antibiotic, B. Subtilis, apparent digestibiliy, methane, performace.
Fonte: Canadian Journal of Animal Science, 2017.