Effects of Tetracycline Son Soil Enzyme Activities in an Alluvial Soil.
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Date
2015
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Abstract
Aims: To study the effect of various doses of tetracycline (TC), oxytetracycline (OTC) and
chlortetracycline (CTC) on the enzymatic (DHA, acid phosphatase, alkaline phosphatase, urease
and catalase) activity in sewage amended and un-amended alluvial soil.
Methodology: A laboratory incubation study was conducted during 2012-2013 on an Aligarh farm
alluvial soil. The enzymatic activity was studied in presence of various doses of three tetracycline
antibiotics in soil; soil amended with sewage sludge; and mixture of sewage sludge and
tetracyclines at different time intervals [(0 (4h), 7, 14, 21, 35, 56, 70,91d].
Results: Activity of all the studied enzymes was significantly inhibited for up to 14-21 days of
incubation (14 d for DHA and acid phosphatase, 21 d for alkaline phosphatase, urease and
catalase) and thereafter inhibition got weaker. The activity of all the studied enzymes decreased
with increase in the doses of tetracyclines. Higher enzymatic activity was observed in sewage
sludge amended soil than in the un-amended soil. Tetracyclines in presence of sewage sludge
were found to have no appreciable effect on enzymatic activities.
Conclusions: Dehydrogenase, acid and alkaline phosphatase, urease and catalase activity in
tetracycline free soil was superior to soil containing antibiotics in the period of 2-3 weeks of
incubation. The inhibition of soil enzyme activity was directly proportional to tetracycline
concentration. In presence of sewage sludge, the studied enzymes activity initially increased up to 3 weeks and decreased thereafter. In presence of sewage sludge and antibiotics, the activity of
enzymes remains almost unchanged. The activity of studied enzymes in soil was positively
correlated to soil organic content.
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Keywords
Antibiotics, tetracycline, oxytetracycline, chlortetracycline, sewage sludge, soil enzyme activity
Citation
Bansal O P. Effects of Tetracycline Son Soil Enzyme Activities in an Alluvial Soil. British Journal of Medicine and Medical Research. 2015; 5(8): 1007-1016.