Table 2 Effect of soil temperature on the degradation rates and half-lives of oxytetracycline (OTC), streptomycin (ST), and validamycin A (VA) in field soil (FS) and rice paddy soil (RS) at pH 6.8 ± 0.1
Antibiotic | Soil | Temperature (oC) | Degradation rate (d−1) | Half-life (d) |
|---|---|---|---|---|
OTC | FS | 1.8 ± 1.0 | 0.0557 ± 0.0091 | 5.9 |
23.0 ± 1.6 | 0.0828 ± 0.0084 | 4.0 | ||
31.2 ± 1.3 | 0.0910 ± 0.0112 | 3.7 | ||
RS | 1.8 ± 1.0 | 0.0454 ± 0.0083 | 6.7 | |
23.0 ± 1.6 | 0.0802 ± 0.0045 | 3.8 | ||
31.2 ± 1.3 | 0.0980 ± 0.0071 | 3.2 | ||
ST | FS | 1.8 ± 1.0 | 0.0051 ± 0.0024 | 55.9 |
23.0 ± 1.6 | 0.0062 ± 0.0041 | 25.6 | ||
31.2 ± 1.3 | 0.0157 ± 0.0036 | 13.0 | ||
RS | 1.8 ± 1.0 | 0.0017 ± 0.0036 | 214.8 | |
23.0 ± 1.6 | 0.0055 ± 0.0009 | 51.5 | ||
31.2 ± 1.3 | 0.0070 ± 0.0022 | 37.3 | ||
VA | FS | 1.8 ± 1.0 | 0.0089 ± 0.0042 | 35.4 |
23.0 ± 1.6 | 0.1441 ± 0.0111 | 2.4 | ||
31.2 ± 1.3 | 0.1532 ± 0.0109 | 1.5 | ||
RS | 1.8 ± 1.0 | 0.0036 ± 0.0035 | 74.2 | |
23.0 ± 1.6 | 0.0535 ± 0.0059 | 5.4 | ||
31.2 ± 1.3 | 0.0976 ± 0.0054 | 2.8 |