Influence of pesticides on acetylene reduction and growth of microorganisms in an organic soil 1 |
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Authors: | C M Tu |
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Institution: | Research Institute , Agriculture Canada , London, Ontario, Canada , N6A 5B7 |
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Abstract: | Abstract The effects of 32 pesticides at two concentrations on acetylene reduction (non‐symbiotic nitrogen fixation), nitrogen fixers, bacteria and fungi in an organic soil were assessed. None of the pesticide treatments suppressed C H reduction as compared to controls. No significant inhibition of the population of non‐symbiotic nitrogen fixers occurred. However, stimulatory effects were observed with treatments of fensulfothion, fonofos, oxamyl, DDR , TeloneR and Telone CR . Bacterial and fungal populations showed temporary declines but all recovered within 7 days to levels similar to or higher than those in the controls. |
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Keywords: | Acetylene reduction organic soil non‐symbiotic nitrogen fixation pesticides microorganism |
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