Table 3. Treatments for natural regeneration in study sites.

Method	Treatment	Area (ha)
Uniform seed tree	Remained 20 trees ha−1	0.9
Grouped three seed tree	Remained 20 trees ha−1	0.7
Strip clear-cutting	Cutting width 10 m, 20 m, 40 m	1.0
Patch clear-cutting	Cutting diameter 20 m, 30 m, 40 m	2.4
Control	-	0.5