2009•Ecotoxicology and Environmental SafetyRequires access
Effects fungicides mancozeb and dinocap on carbon and nitrogenmineralization
Jitka Černohlávková, Jiří Jarkovský, Jakub Hofman
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Abstract
In our study, effects of fungicides mancozeb and dinocap on C
and N mineralization were measured in arable and grassland
soil. The soils were treated with these fungicides at the
application and ten-times lower doses and then incubated at 20
C for two weeks. Carbon mineralization (basal and
substrate-induced respiration) and nitrogen mineralization
(potential ammonification and nitrification) were evaluated 1
and 14 days after the treatment. After 14 days, ammonification
was decreased to 48% and 83% at dinocap application dose in
arable and grassland soil, respectively. Application dose of
mancozeb caused significant decrease of nitrification to 11.2 %
and 5.6 % in arable and grassland soil, respectively. Basal
respiration and substrate-induced growth were rather stimulated
by fungicides, especially at lower application doses. To
conclude, potential risk exists to soil microorganisms and
their activities in soils treated routinely by mancozeb or
dinocap.