Table 1.

Characterization of root traits in Pinus seedlings. Different letters display significant difference at P < 0.05

Samples	Main root length (cm)	Root surface area (cm2)	Average root diameter (mm)	Root number
CK0	6.24 ± 1.41a	0.73 ± 0.8a	0.36 ± 0.10b	50.75 ± 8.04b
CK04	3.98 ± 0.80b	0.39 ± 0.12c	0.20 ± 0.05c	30.00 ± 8.11c
SL0	5.41 ± 1.30a	0.77 ± 0.08a	0.55 ± 0.07a	63.25 ± 11.45a
SL04	3.64 ± 0.70b	0.52 ± 0.15b	0.39 ± 0.05b	47.00 ± 9.90b