The effects of residual tetracycline on soil enzymatic activities and plant growth

Author： Wei X.

ISSN： 0360-1234

Source： Journal of Environmental Science and Health, Part B, Vol.44, Iss.5, 2009-06, pp. : 461-471

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Abstract

A pot trial was carried out to investigate the adverse effects of tetracycline (TC) on soil microbial communities, microbial activities, and the growth of ryegrass (Lolium perenne L). The results showed that the presence of TC significantly disturbed the structure of microbial communities and inhibited soil microbial activities in terms of urease, acid phosphatase and dehydrogenase (p < 0.05).="" plant="" biomass="" was="" adversely="" influenced="" by="" tc,="" especially="" the="" roots="" with="" a="" reduction="" of="" 40%="" when="" compared="" with="" the="" control.="" furthermore,="" tc="" decreased="" the="" assimilation="" of="" phosphorus="" by="" the="" plant="" although="" the="" concentration="" of="" phosphorus="" was="" increased="" by="" 20%="" due="" to="" decreased="" plant="" biomass.="" tc="" seemed="" to="" increase="" the="" concentration="" of="" dissolved="" organic="" carbon="" (by="" 20%)="" in="" soil.="" the="" findings="" implied="" that="" the="" agricultural="" use="" of="" animal="" manure="" or="" fishpond="" sediment="" containing="" considerable="" amounts="" of="" antibiotics="" may="" give="" rise="" to="" ecological="" risks.="">