Table 3. Urease and protease activities in the sediments from each six sampling sites (site A, site B, site C, site D, site E, site F) in the Zhou cun drinking water reservoir, eastern China.
| Sampling sites | Urease activity [mg NH3-N/(g·24h)] | Protease activity [mg NH2-N/(g·24h)] |
|---|---|---|
| Site A | 2.48±0.57C | 17.41±0.16E |
| Site B | 4.23±0.84BC | 24.83±0.37D |
| Site C | 7.61±0.73B | 31.57±1.21C |
| Site D | 11.81±0.67A | 54.74±0.28A |
| Site E | 11.50±1.10A | 48.46±1.32B |
| Site F | 5.80±0.00BC | 16.28±1.01E |
| One way ANOVA | F=27.11, P<0.01 | F=358.41, P<0.01 |
The data shown are the means and standard error (n=3). Values in the column followed by a different capital letter are significantly different by Tukey-Kramer HSD (P<0.01)