Soil-plant co-stimulation during forest vegetation restoration in a subtropical area of southern China

Forest Ecosystems

Table 4 Stepwise regression of corresponding factors for biomass (n = 16)

Restoration periods	Regression coefficient							R²	p
Restoration periods	DBH	H	pH	SOC	TN	AN	AP	R²	p
Whole	7151.27	–	–	7595.62	–	–	–	0.914	0.000
4–5 years	–	–	–	−966.94	–	–	–	0.903	0.050
10–12 years	–	15,620.74	−1.00	–	–	–	−3484.06	0.990	0.000
45–46 years	–	−10,432.46	14,071.07	–	–	–	–	0.990	0.000
Old growth forest	–	–	–	45,060.13	18,771.33	–	26,287.80	0.990	0.000

“—” indicates that the factors were removed by stepwise regression; R² indicates adjustment decision coefficient