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Research Article
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Effect of Three Fungicides on Soil Microbial Activity and Nitrogen Dynamics |
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Refik Uyanoz ,
Ummuhan Cetin
and
Emel Karaarslan
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ABSTRACT
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The objective of this investigation was to determine the effects
of three fungicides on microbial activity and nitrogen dynamics of the soil.
The effects of three fungicides, captan, quintozene, propamocarb hydrochloride
on soil microbial activity (urease, catalase, net mineralization and soil respiration)
were investigated in laboratory experiments. In each batch, incubation soil
was treated with a fungicide at recommended field application rates and as a
fould and incubated at 27°C for 40 days at a moisture level of field capacity.
The fungicides inhibited net mineralization and nitrification at generally 4th
and 8th days of incubation period. Soil respiration showed fluctuations with
change in the dose and kind of the fungicide. Effect of the fungicides on catalase
activity was not found statistically significant during incubation. Urease activity
was significantly (p<0.05) affected from the fungicides.
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