Table 1.
Effects of foliar fertilizer spraying on leaf chlorophyll content and photosynthetic properties at different leaf developmental stagesa.
| Date | Total chlorophyll content (g·kg−1) | Net photosynthetic rate (μmol·m−2·s−1) | Stomatal conductance (vpm) | Transpiration rate (mmol·m−2·s−1) | ||||
|---|---|---|---|---|---|---|---|---|
| Control | Fertilizer | Control | Fertilizer | Control | Fertilizer | Control | Fertilizer | |
| March 15th (S1) | 0.88 ± 0.06 | — | — | — | — | — | — | — |
| April 10th (S2) | 1.44 ± 0.07 | 1.69 ± 0.06∗ | 23.57 ± 0.19 | 26.98 ± 0.27∗ | 0.43 ± 0.03 | 0.55 ± 0.03∗ | 3.69 ± 0.12 | 4.22 ± 0.09∗ |
| July 10th (S3) | 1.56 ± 0.05 | 1.82 ± 0.07∗ | 29.68 ± 0.23 | 34.37 ± 0.31∗ | 0.51 ± 0.04 | 0.64 ± 0.05∗ | 4.03 ± 0.26 | 4.27 ± 0.17 |
| October 15th (S4) | 1.01 ± 0.06 | 1.22 ± 0.06∗ | 18.82 ± 0.12 | 22.06 ± 0.39∗ | 0.29 ± 0.02 | 0.39 ± 0.02∗ | 2.61 ± 0.21 | 3.05 ± 0.24 |
| November 15th (S5) | 0.22 ± 0.03 | 0.24 ± 0.04 | 4.25 ± 0.06 | 4.52 ± 0.24 | 0.08 ± 0.01 | 0.10 ± 0.02 | 1.08 ± 0.13 | 1.12 ± 0.11 |
aNo detection. ∗ stands for t-test under P < 0.05.