Background:

Efficient microorganisms offer a broad application spectrum in crop and animal production.

Aim

to evaluate the effect of a biopreparation containing autochthonous efficient microorganisms in Guantanamo (MEAG), Cuba, on the bioproductive and hematologic parameters of swine herds.

Methods:

A total of 96 animals (Duroc/CC21) weighing 1.55±0.27 kg were included in the experiment since birth, and distributed in four groups with 24 repetitions, following a completely randomized design. The treatments consisted in the control and addition of the biopreparation, in 2.0, 10.0, and 20.0 mL.kg-1 doses live weight/day, orally. The experiment lasted 33 days, and the final weight, weight gain, mean daily gain, feed conversion, mortality, morbidity, hemoglobin, hematocrit, total leucocytes, eosinophils, lymphocytes, and monocytes were analyzed. A simple analysis of variance was performed, and the mean differences were detected using the multiple range test.

Results:

The results were better (p<0.05) in the 2.0 mL dose of the MEAG/kg live weight biopreparation associated with final live weight and weight gain (0.59; 0.70, and 0.66 kg), and mean daily gain; whereas it was lower in feed conversion in the control and treatments two and three. In morbidity alone, differences between the control group and treatment three were observed, though no differences were detected between the two remaining groups. The hematological values rose with larger doses, but within the normal range.

Conclusions:

The utilization of MEAG as a feed additive improves the bioproductive and hematological parameters of swine herds.