OPPORTUNITIES TO IMPROVE THE CHARACTERISTICS OF MANURE LITTER IN POULTRY FARMS: 1. APPLICATION OF BACTERIAL-ENZYMATIC ADDITIVE IN LAYING HENS
V. Vasilev, E. Videv
Abstract: The aim of this study was to establish the values of pH, moisture, nitrogen (NH4
+ -N; NO3 - N; and total N) and total carbon in the laying hens manure litter (LHML), treated by bacterial-enzymatic product Micropan® Normal (Eurovix, Italy). The study has been carried out at the poultry farm of the Agricultural institute – Stara Zagora for a period of 61 days, when the last sample was taken. The treatment was done at the days 1, 15, 29, 40 and 54 of the experiment. The composite samples for the purposes of laboratory analysis were taken at days 8, 12, 19, 26, 33, 40, 50, 54 and 61 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 (8.68 ± 0.23 and 8.75 ± 0.12, respectively). The moisture of the ES decreased significantly (P < 0.001) by 35.4% in comparison with CS. The NH4 + -N concentrations and the NH4 + -N:total N ratio in the treated LHML decreased by 15.6% (n.s.; P = 0,128) and 34,6% (P < 0.01), respectively, whereas the treatment had no significant effect on the NO3 - N concentrations. After day 19 the concentration of NH4 + -N in treated litter decreased significantly (P = 0.012) by 28.51%. There were significant increases in the percentages of the total N and total C in the treated LHML by 35.03% (P < 0.01) and 31.34% (P < 0.001), respectively. The C:N ratio was 8.46 ± 0.60 and 8.64 ± 0.52 for ES and CS, respectively, with no significant differences.
+ -N; NO3 - N; and total N) and total carbon in the laying hens manure litter (LHML), treated by bacterial-enzymatic product Micropan® Normal (Eurovix, Italy). The study has been carried out at the poultry farm of the Agricultural institute – Stara Zagora for a period of 61 days, when the last sample was taken. The treatment was done at the days 1, 15, 29, 40 and 54 of the experiment. The composite samples for the purposes of laboratory analysis were taken at days 8, 12, 19, 26, 33, 40, 50, 54 and 61 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 (8.68 ± 0.23 and 8.75 ± 0.12, respectively). The moisture of the ES decreased significantly (P < 0.001) by 35.4% in comparison with CS. The NH4 + -N concentrations and the NH4 + -N:total N ratio in the treated LHML decreased by 15.6% (n.s.; P = 0,128) and 34,6% (P < 0.01), respectively, whereas the treatment had no significant effect on the NO3 - N concentrations. After day 19 the concentration of NH4 + -N in treated litter decreased significantly (P = 0.012) by 28.51%. There were significant increases in the percentages of the total N and total C in the treated LHML by 35.03% (P < 0.01) and 31.34% (P < 0.001), respectively. The C:N ratio was 8.46 ± 0.60 and 8.64 ± 0.52 for ES and CS, respectively, with no significant differences.
Keywords: bacterial-enzymatic additive; laying hens; manure litter; treatment
Date published: 2017-12-20
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