Table 3.
Coefficients of impact (IF) of an alleviating substance for enzyme activity and number of microorganisms in soil pollution with o-cresol
| Dose of o-cresol mg kg−1 d.m. of soil | Enzyme activity | |||||||
| DEH | URE | PAC | PAL | CAT | ARYL | GLU | ||
| 0 | 0.921b | 6.291a | 1.465a | 1.701a | 10.001b | 2.654a | 0.847b | |
| 0.1 | 0.778c | 2.785b | 0.961b | 1.615b | 17.932a | 2.144a | 0.826b | |
| 1 | 0.910b | 2.375b | 0.934b | 1.684b | 4.809c | 2.498a | 1.028a | |
| 10 | 0.942b | 2.826b | 0.981b | 1.655b | 4.644c | 2.353a | 1.066a | |
| 50 | 1.070a | 1.903b | 0.955b | 1.815b | 3.299d | 0.970b | 1.076a | |
| Average | 0.924z | 3.236w | 1.059z | 1.694y | 8.137u | 2.124x | 0.969z | |
| r | 0.810* | − 0.496* | − 0.310 | 0.802* | − 0.536* | − 0.929* | 0.607* | |
| Number of microorganisms | ||||||||
| Am | Im | Arth | Ps | Org | Fun | Act | Az | |
| 0 | 1.248b | 3.372b | 5.025a | 4.608a | 1.241c | 1.004c | 1.324b | 0.312b |
| 0.1 | 1.514ab | 3.816a | 4.331ab | 3.783ab | 1.881b | 1.084c | 2.655a | 1.778a |
| 1 | 1.876ab | 3.502b | 5.039a | 3.222b | 1.984b | 1.463b | 2.869a | 0.527b |
| 10 | 2.006a | 3.373b | 4.665a | 2.858b | 2.670a | 0.902c | 1.610b | 0.279b |
| 50 | 1.886ab | 1.832c | 3.140b | 5.113a | 2.799a | 3.177a | 1.896b | 0.273b |
| Average | 1.706xy | 3.179w | 4.440t | 3.917u | 2.115x | 1.526y | 2.071x | 0.634z |
| r | 0.323 | − 0.975* | − 0.855* | − 0.765* | 0.724* | 0.934* | 0.944* | − 0.387 |
Homogeneous groups specified in columns, for each enzyme and group of microorganisms, depending on the increasing doses of o-cresol. r, the correlation coefficient. *Significant for P = 0.05, n = 14