Effects of thinning intensity on nutrient concentration and enzyme activity in Larix kaempferi forest soils

Table 1 Concentrations of the inorganic nitrogen (N) and the extractable phosphorus (P), calcium (Ca), magnesium (Mg), and potassium (K) in the control, 20 % thinning (T20), and 30 % thinning (T30) at a depth of 0–10 cm 3 years following thinning

Thinning intensity	Inorganic N (mg kg⁻¹)	Extractable P (mg kg⁻¹)	Extractable Ca (cmol_c kg⁻¹)	Extractable Mg (cmol_c kg⁻¹)	Extractable K (cmol_c kg⁻¹)
Control	8.63 (0.26)b	17.50 (0.51)a	0.83 (0.08)b	0.27 (0.02)b	0.24 (0.04)a
T20	17.48 (1.91)a	20.03 (1.40)a	2.57 (0.56)a	0.57 (0.07)a	0.29 (0.02)a
T30	10.64 (1.37)b	18.14 (1.05)a	1.50 (0.17)ab	0.44 (0.05)ab	0.22 (0.01)a

Different letters indicate significant difference among the three thinning intensities (n = 3; P = 0.05). Values in parenthesis denote the standard errors

ISSN: 2288-1220