. 2023 Jul 28;14:1198313. doi: 10.3389/fmicb.2023.1198313

Table 1.

Soil physicochemical properties for different restoration ages.

Forest type	Restoration age	Soil water content	Bulk density	pH	TC	T N	TP	NO₃⁻-N	NH₄⁺-N	AP
Forest type	Restoration age	(g·g⁻¹)	(g·cm⁻³)		(g·kg⁻¹)	(g·kg⁻¹)	(g·kg⁻¹)	(mg∙kg⁻¹)	(mg∙kg⁻¹)	(mg∙kg⁻¹)
PT	10 years	0.09 ± 0.01b	0.48 ± 0.01a	7.95 ± 0.01a	11.72 ± 0.68c	0.27 ± 0.02c	0.69 ± 0.04ab	10.39 ± 0.6c	8.10 ± 0.47b	8.90 ± 0.51a
	20 years	0.06 ± 0.01b	0.51 ± 0.02a	7.95 ± 0.01a	20.98 ± 1.21b	1.02 ± 0.06b	0.61 ± 0.04b	13.45 ± 0.78b	9.53 ± 0.55ab	7.90 ± 0.46ab
	30 years	0.24 ± 0.05a	0.44 ± 0.01b	7.84 ± 0.01b	35.84 ± 2.07a	1.65 ± 0.1a	0.78 ± 0.05a	21.25 ± 1.23a	10.69 ± 0.62a	6.80 ± 0.39b
UP	10 years	0.1 ± 0.03b	0.49 ± 0.01a	8.00 ± 0.00a	31.23 ± 1.8b	1.75 ± 0.1b	0.65 ± 0.04b	11.22 ± 0.65a	10.15 ± 0.59b	4.60 ± 0.27b
	20 years	0.11 ± 0.02b	0.48 ± 0.02a	7.81 ± 0.01b	32.65 ± 1.89ab	1.9 ± 0.11b	0.75 ± 0.04ab	11.75 ± 0.68a	11.83 ± 0.68ab	7.70 ± 0.44a
	30 years	0.27 ± 0.01a	0.39 ± 0.01b	7.75 ± 0.02c	35.10 ± 2.03a	2.31 ± 0.13a	0.87 ± 0.05a	11.78 ± 0.68a	13.01 ± 0.75a	8.80 ± 0.51a
Summary of ANOVA (p-values)
Forest type		0.02	0.008	<0.001	<0.001	<0.001	0.004	<0.001	<0.001	0.001
Restoration age		<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	0.001
Forest type × restoration age		0.255	0.009	<0.001	<0.001	<0.001	0.002	<0.001	0.923	<0.001

PT, Pinus tabuliformis; UP, Ulmus pumila; TC, total carbon content; TN, total nitrogen content; TP, total phosphorus content; NO₃⁻-N, nitrate nitrogen; NH₄⁺-N, ammonium nitrogen; AP, available P content. Values are mean ± standard deviation (n = 5). Statistical significance was assessed by one-way ANOVA followed by LSD multiple comparison test. Different lowercase letters per column indicate the significant difference (p < 0.05).