Research Article
Potential of Controlled Irrigation and Drainage for Reducing Nitrogen Emission from Rice Paddies in Southern China
Table 2
The change of the concentration of
-N,
-N, and TN after fertilization at tillering stage in 2010.
| Form of N | Sample site | Measure time | 8.6 | 8.9 | 8.11 | 8.13 |
| -N (mg/L) | Surface | 1.55 | 2.01 | 1.10 | 1.53 | Underground | 0.74 | 0.56 | 2.09 | 0.77 |
| -N (mg/L) | Surface | 0.28 | 0.41 | 0.28 | 0.25 | Underground | 0.29 | 0.19 | 0.31 | 0.17 |
| TN (mg/L) | Surface | 2.64 | 2.92 | 3.77 | 2.41 | Underground | 2.62 | 2.39 | 2.46 | 2.84 |
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