Effect of pig slurry on increase of biodegradation of petroleum products in soil
1998
Rimovsky, K. | Bauer, F. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic)) | Bohacek, Z. | Linhartova, M. | Toul, J.
Fertilization of haylage oat and winter rye for green forage by pig slurry increased intensity of soil nitrification during growing season. Positive effect of slurry on microbial processes in soil is given by a close ratio in slurry-contained carbon and nitrogen. Soil contamination by gear oil and diesel oil before sowing of haylage oat reduced intensity of soil nitrification. Application of pig slurry in contaminated soil reduced the negative impact of petroleum products on soil nitrification in the first growing season, and fully eliminated it in the second growing season. The course of biodegradation of petroleum products in soil was investigated through the ratio of hydrocarbons of n-heptadecane to pristan (C17/pri) and n-octadecane to phytane (C18/fy). Another binding indicator of the degree of soil contamination by petroleum products is the content of nonpolar extractable substances. Analyses conducted proved the decrease in their content in soil due to applied slurry.
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