Table 1.
ANOVA of effect of treatments (T), water gradients (W) and growth stage (S) on dry biomass, root/shoot ratio and photosynthesis parameters in 2014 and 2015.
| Factor | DF | DM-AG | DM-UG | R/S | SPAD | Pn | Tr | Gs | Ci |
|---|---|---|---|---|---|---|---|---|---|
| T | 2 | *** | *** | ** | *** | *** | *** | *** | *** |
| W | 2 | *** | *** | *** | *** | *** | *** | *** | *** |
| S | 2 | *** | *** | *** | *** | *** | *** | *** | *** |
| T*S | 4 | *** | *** | *** | NS | NS | *** | *** | * |
| S*W | 4 | *** | *** | *** | NS | *** | *** | *** | ** |
| W*T | 4 | NS | *** | NS | NS | NS | ** | ** | NS |
| W*S*T | 8 | NS | *** | NS | NS | NS | NS | NS | NS |
Significance: *P < 0.05; **P < 0.01; ***P < 0.001; NS, not significant (P > 0.05). DF, degrees of freedom; DB-AG, dry biomass above ground; DB-UG, dry biomass underground; R/S, crop root/shoot ratio; SPAD, leaf soil plant analysis development value; Pn, net photosynthesis rate; Gs, stomatal conductance; Ci, intercellular CO2 concentration; Tr, transpiration rate.