Assessment of some cultural experimental methods to study the effects of antibiotics on microbial activities in a soil: An incubation study - Fig 3

<p><b>Cumulative respiration of oxytetracycline (OTC) (A) and sulfamethoxazole (SMX) (B) treatments depending on sample treatment (0, 1, 10, 25, 50, and 100 mg/kg) and incubation time (1, 2, 3, 4, 5, 6, 11, and 21 days).</b> Error bars represent the standard deviation of replicate analyses (n = 3). The standard deviations of replicates are in the range of 0.005–0.071 and 0.006–0.095 mg CO₂. g^-1 dm. h^-1 for oxytetracycline and sulfamethoxazole treatments, respectively.</p

Physical and chemical characterization of the soil.

<p>Physical and chemical characterization of the soil.</p

Iron concentration of oxytetracycline (OTC) and sulfamethoxazole (SMX) treatments depending on sample treatment (0, 1 and 10 mg/kg).

<p>Different letters indicate significant differences (confidence level of 95%) among treatments at incubation time (one-way ANOVA, followed by the least significant difference test). Error bars represent the standard deviation of replicate analyses (n = 3).</p

Two-way analysis of variance (ANOVA) of cumulative respiration for OTC and SMX treatments.

<p>Two-way analysis of variance (ANOVA) of cumulative respiration for OTC and SMX treatments.</p

Two-way analysis of variance (ANOVA) of microbial biomass carbon for OTC and SMX treatments.

<p>Two-way analysis of variance (ANOVA) of microbial biomass carbon for OTC and SMX treatments.</p