Table 4.
The effect of nitrogen levels on photosynthesis, leaf nitrogen, C/N ratio and chlorophyll content in L. pumila.
| Parameters | 0 kg N/ha | 90 kg N/ha | 180 kg N/ha | 270 kg N/ha |
|---|---|---|---|---|
| Photosynthesis (μmol/m2/s) | 2.11 ± 0.25 d | 4.21 ± 0.34 c | 7.31 ± 0.12 b | 10.71 ± 0.43 a |
| Leaf Nitrogen (%) | 0.76 ± 0.12 d | 2.44 ± 0.02 c | 2.89 ± 0.23 b | 3.26 ± 0.43 a |
| C/N | 27.15 ± 0.45 a | 22.16 ± 0.45 b | 16.73 ± 0.65 c | 10.22 ± 0.56 d |
| Chlorophyll a (mg/g fresh weight) | 3.60 ± 0.08 d | 4.44 ± 0.09 c | 5.42 ± 0.04 b | 6.47 ± 0.01 a |
| Chlorophyll b (mg/g fresh weight) | 12.76 ± 0.23 d | 14.72 ± 0.34 c | 18.23 ± 0.09 b | 21.27 ± 0.23 a |
| T. Chlorophyll (mg/g fresh weight) | 15.34 ± 0.34 d | 19.21 ± 0.31 c | 23.54 ± 0.78 b | 27.23 ± 0.55 a |
All analyses are mean ± standard error of mean (SEM), N = 18. Means not sharing a common single alphabet were significantly different at P ≤ 0.05.