Changes in Soil Chemical Properties and Microbial Activities in Response to the Fungicide Ridomil Gold Plus Copper

International Journal of Environmental Research and Public Health

Joseph Demanou¹  Adolphe Monkiédjé¹  Thomas Njiné¹  Samuel M. Foto¹  Moise Nola¹  Serges H. Zebaze Togouet¹ 

[1] Laboratory of General Biology. Department of Animal Biology and Physiology, Faculty of Science, University of Yaounde I., P.O. Box 812 Yaounde, Republic of Cameroon

关键词: Ridomil gold plus;    enzyme activities;    soil chemical properties;    field conditions;    nitrogen transformation;   

DOI  :  10.3390/ijerph2004010026

来源: mdpi

【 摘 要 】

The purpose of the study was to investigate changes of soil chemical and biological properties changes resulting from a single application of the fungicide Ridomil Gold plus copper (Ridomil Gold plus)(mefenoxam 6% + copper oxide 60%) at the following rates 0.25, 0.5, 1, 2, and 10 g m^-2. Selected chemical properties generally differed between fungicide rates over longer incubation periods. Microbial activity indices (available N, ammonification rates and specific enzymatic systems) were more sensitive indicators of change. Values of these indicators generally increased with incubation period and decreased or increased at high rates. Significant changes in P availability occurred after 90 days of incubation at rates ≥ 1 g m^-2. Incorporation of the fungicide significantly increased NH₄+ levels in soil after 75 days of incubation. These changes stimulated soil microbial activity as evidenced by increased ammonification rates especially at long-term exposure. Of the enzyme activities studied, dehydrogenase and ß-glucosidase activities were the most sensitive to ridomil gold plus. This sensitivity was more pronounced with the dehydrogenase activity.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.