Effect of Four Nematocides on Activities of Microorganisms in Soil1
AUTOR(ES)
Tu, C. M.
RESUMO
Tests were conducted to determine the effects of four nematocides, Dasanit, carbofuran, D-D, and Vorlex on microbial activities in a loamy sand. The results indicated that bacterial and fungal populations initially decreased with some nematocide treatments but recovered rapidly to levels similar to those in the controls. In some instances, ammonium production from added peptone increased in the nematocide-treated soils, whereas mineralization of soil organic nitrogen and nitrification and oxidation of elemental sulfur were depressed. Oxygen consumption generally increased in proportion to the concentration of nematocide in the soil. However, with Vorlex, an increase in respiration was evident at the lower concentration, whereas an inhibitory effect occurred at the higher concentration. The study indicated that indigenous soil microorganisms can tolerate these chemicals used for control of nematodes in soil.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=380351Documentos Relacionados
- Effect of Four Organophosphorus Insecticides on Microbial Activities in Soil 1
- MICROÖRGANISMS CONCERNED IN THE DECOMPOSITION OF CELLULOSES IN THE SOIL1
- Plating Isolation of Various Catalase-Negative Microorganisms from Soil1
- Comparative Denitrification of Selected Microorganisms in a Culture Medium and in Autoclaved Soil1
- USE OF THE MICROSCOPE IN STUDYING THE ACTIVITIES OF BACTERIA IN SOIL1