Table 4. Effect of polypropylene mulching treatments on LWR, SWR, RWR, SQI of Quercus glauca Thunb. seedling

Treatment	LWR^z (g/g)	SWR^y (g/g)	RWR^x (g/g)	SQI^w (g/g)
60g/m² overlapping	0.466±0.081^a	0.204±0.025^a	0.331±0.065^b	1.02±0.36^a
60g/m² hole drilling	0.305±0.150^ab	0.190±0.102^a	0.339±0.161^ab	0.65±0.32^ab
80g/m² overlapping	0.397±0.102^ab	0.224±0.043^a	0.379±0.086^ab	1.09±0.21^a
80g/m² hole drilling	0.396±0.104^ab	0.192±0.040^a	0.412±0.073^ab	0.74±0.35^ab
Control	0.295±0.148^b	0.206±0.033^a	0.499±0.128^a	0.64±0.21^b

Leaf dry weight ratio.
Shoot dry weight ratio.
Root dry weight ratio.
Seedling quality index.
Data are the Mean±SE from the three replicates. Difference letters indicate treatments are significant difference at p<0.05 by Ducan's multiple range test.