Effects of the herbicide alachlor on soil microbial activities
Pozo, C. ; Salmeron, V. ; Rodelas, B. ; Martinez-Toledo, M. V. ; Gonzalez-Lopez, J.
Springer
Published 1994
Springer
Published 1994
| ISSN: |
1573-3017
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|---|---|
| Keywords: |
Alachlor ; herbicides ; pesticides ; soil bacteria ; enzymatic activities
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Energy, Environment Protection, Nuclear Power Engineering
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| Notes: |
A study was made of the effects of one selected acetanilide herbicide, alachlor, at concentrations of 2.0–10.0 kg ha−1 on bacterial populations, fungi, dinitrogen fixation bacteria, denitrifying bacteria, nitrifying bacteria, nitrogenase activity, acid and alkaline phosphatases, arylsulfatase and deshydrogenase. The presence of 2.0–10.0 kg ha−1 of alachlor in the soil increased the total number of bacteria and fungi. The population of denitrifying bacteria increased significantly at concentrations of 5.0–10.0 kg ha−1. However, aerobic dinitrogen fixing bacteria and nitrogenase activity decreased at alachlor concentrations of 3.5–10.0 kg ha−1. Acid and alkaline phosphatases, arylsulfatase and dehydrogenase activity decreased significantly initially at concentrations of 5.0–10.0 kg ha−1, but recovered to levels similar to those in the control. Nitrifying bacteria were not affected as a consequence of the addition of the herbicide to agricultural soil.
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| Type of Medium: |
Electronic Resource
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| URL: |