Table 2 Experimental design of groups under acid precipitation (a), deicing salt (D) and freeze-thaw (F) stress
A-D-F | A-F | D-F | F | A-D | A | D | CK | |
|---|---|---|---|---|---|---|---|---|
Acid precipitation | + | + | – | – | + | + | – | – |
Deicing salt | + | – | + | – | + | – | + | – |
Freeze-thaw | + | + | + | + | – | – | – | – |
A-D-F | A-F | D-F | F | A-D | A | D | CK | |
|---|---|---|---|---|---|---|---|---|
Acid precipitation | + | + | – | – | + | + | – | – |
Deicing salt | + | – | + | – | + | – | + | – |
Freeze-thaw | + | + | + | + | – | – | – | – |