Table 2.
The correlation between morphological indexes, biomass and stoichiometry of P. sepium leaves with different burial depths
| N | C | P | C/N | C/P | N/P | DW (leaf) | Number of leaves | Area of leaf | DW (stem) | DW (root) | Primary root number | Height | Basal diameter | Total biomass | Above-ground biomass | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | 1 | |||||||||||||||
| C | 0.419 | 1 | ||||||||||||||
| P | .970** | 0.328 | 1 | |||||||||||||
| C/N | −.972** | −0.347 | −.949** | 1 | ||||||||||||
| C/P | −.919** | −0.193 | −.975** | .942** | 1 | |||||||||||
| N/P | .823** | .535* | .665** | −.815** | −.584* | 1 | ||||||||||
| DW (leaf) | .796** | 0.225 | .805** | −.728** | −.757** | .544* | 1 | |||||||||
| Number of leaves | .600** | 0.457 | .534* | −.630** | −.522* | .635** | .590** | 1 | ||||||||
| Area of third leaf | .763** | 0.252 | .789** | −.840** | −.835** | .573* | .579* | .622** | 1 | |||||||
| DW (stem) | .905** | 0.298 | .893** | −.827** | −.819** | .677** | .898** | .482* | .545* | 1 | ||||||
| DW (root) | .921** | 0.305 | .915** | −.928** | −.905** | .723** | .834** | .671** | .788** | .899** | 1 | |||||
| Primary root number | .843** | 0.24 | .812** | −.816** | −.794** | .688** | .851** | .685** | .681** | .810** | .850** | 1 | ||||
| Height | .916** | 0.337 | .859** | −.898** | −.830** | .814** | .844** | .707** | .718** | .890** | .945** | .918** | 1 | |||
| Basal diameter | .675** | 0.121 | .754** | −.629** | −.751** | 0.301 | .794** | .514* | .619** | .725** | .776** | .697** | .691** | 1 | ||
| Total biomass | .927** | 0.299 | .922** | −.890** | −.882** | .701** | .922** | .614** | .693** | .970** | .972** | .869** | .943** | .792** | 1 | |
| Above-ground biomass | .888** | 0.279 | .883** | −.812** | −.817** | .646** | .956** | .532* | .571* | .988** | .898** | .844** | .895** | .767** | .976** | 1 |
** Significant correlation at 0.01 levels (bilateral). * Significant correlation at 0.05 levels (bilateral). DW-Dry weight