TREATMENT OF DAIRY MANURE LITTER WITH BACTERIAL-ENZYMATIC BIOACTIVATOR

V. Vasilev, E. Videv, J. Krustanov

Abstract: The aim of this study was to establish the values of pH, moisture, nitrogen (NH4+ -N; NO3 - N; and total N), total carbon and neutral detergent fibers in the dairy manure litter (DML), treated by bacterial-enzymatic product Micropan® Normal (Eurovix, Italy). The study has been carried out at the dairy farm of the Agricultural institute – Stara Zagora for a period of 49 days, when the last sample was token. The treatment was done at the days 1, 8, 15, 22 and 36 of the experiment. The composite samples for the purposes of laboratory analysis were token at days 11, 15, 18, 22, 25, 29, 32, 36, 39, 44 and 49 of the experiment. It was established that there were no significant differences between the experimental samples (ES) and control samples (CS) average values of the pH (8.96 and 8.93, respectively). The moisture of the ES decreased by 7.4% in comparison with CS, which was confirmed by the subjective sensitive assessment: the treated DML was dryer and softer
with no presence of malodor. The NH4 + -N concentrations and the NH4 + -N/total N ratio in the treated DML decreased by 42.3 and 53.3%, respectively, whereas the NO3 - N concentrations were extremely low for all samples. The total potential loss of N and C from the treated DML was respectively 10.8 and 8.9% less than control one. The C:N ratio was 10.55 and 10.77 for ES and CS, respectively. Treatment had no significant effect on the NDF content as the decrease was 0.6%.

Keywords: bacterial-enzymatic bioactivator; dairy cows; manure litter; treatment

Date published: 2017-03-20