Table 4 Pearson correlations between glomalin features and soil physiochemical properties, nutrients and climatic conditions, and differences between the surface and deep soils.

From: Glomalin contributed more to carbon, nutrients in deeper soils, and differently associated with climates and soil properties in vertical profiles

Parameter	depth	EEG	TG	EEG/SOC	TG/SOC	EEG/N	TG/N	EEG/P	TG/P	EEG/TG
Soil physicochemical properties, stronger regulations at the deep soils than the surface soils
Bulkdensity	Surface	−0.100	−0.248^**	0.313^**	0.105	0.356^**	0.160	0.065	0.025	0.240^**
	Deep	−0.012	−0.255^**	0.364^**	0.053	0.395^**	0.092	0.123	0.070	0.269^**
	D/S	—	1.03	1.17	—	1.11	—	—	—	1.12
soilwater	Surface	−0.010	0.075	−0.224^**	−0.168^*	−0.446^**	−0.332^**	−0.010	0.025	−0.124
	Deep	0.213^**	0.192^**	−0.267^**	−0.330^**	−0.168^*	−0.200^**	0.056	0.029	0.088
	D/S	21.3	2.56	1.19	1.96	0.37	0.60	—	—	—
pH	Surface	−0.396^**	−0.338^**	−0.147	−0.204^*	−0.169^*	−0.179^*	0.060	0.064	0.110
	Deep	−0.644^**	−0.592^**	−0.315^**	−0.341^**	−0.344^**	−0.413^**	0.017	0.026	0.044
	D/S	1.63	1.75	2.14	1.67	2.04	2.31	—	—	—
EC	Surface	−0.094	−0.011	−0.176^*	−0.130	−0.068	−0.043	−0.043	−0.035	−0.115
	Deep	−0.419^**	−0.315^**	−0.391^**	−0.329^**	−0.414^**	−0.357^**	−0.085	−0.085	−0.063
	D/S	4.46	28.6	2.22	2.53	6.09	8.30	—	—	—
Soil nutrients, generally lower regulations in the deep soils than the surface soils.
SOC	Surface	0.427^**	0.682^**	−0.517^**	−0.262^**	−0.230^**	0.002	0.099	0.147	−0.421^**
	Deep	0.414^**	0.659^**	−0.280^**	−0.185^**	−0.174^*	−0.046	−0.069	−0.028	−0.177^**
	D/S	0.97	0.97	0.54	0.71	0.76	—	—	—	0.42
N	Surface	0.261^**	0.432^**	−0.370^**	−0.209^*	−0.583^**	−0.456^**	−0.011	0.031	−0.267^**
	Deep	0.323^**	0.577^**	−0.257^**	−0.101	−0.333^**	−0.228^**	−0.070	−0.024	−0.192^**
	D/S	1.23	1.34	0.69	0.48	0.57	0.50	—	—	0.72
AN	Surface	0.247^**	0.314^**	−0.263^**	−0.181^*	−0.220^**	−0.143	−0.021	0.001	−0.114
	Deep	0.107	0.291^**	−0.104	0.056	−0.097	0.046	0.000	0.015	−0.088
	D/S	0.43	0.93	0.38	0.31	0.44	—	—	—	—
AP	Surface	0.366^**	0.235^**	0.175^*	0.139	0.268^**	0.200^*	−0.001	−0.021	0.031
	Deep	0.333^**	0.327^**	0.053	0.147^*	0.072	0.168^*	−0.070	−0.068	−0.095
	D/S	0.91	1.39	0.30	1.06	0.27	0.84	—	—	—
P	Surface	0.153	0.330^**	−0.186^*	−0.050	−0.232^**	−0.079	−0.34^**	−0.34^**	−0.208^*
	Deep	0.128	0.294^**	−0.133	−0.025	−0.131	−0.008	−0.24^**	−0.26^**	−0.159^*
	D/S	—	0.89	0.72	—	0.56	—	0.71	0.76	0.76
K	Surface	0.042	−0.057	0.130	−0.002	0.129	0.035	0.086	0.073	0.105
	Deep	0.118	0.058	0.268^**	0.260^**	0.306^**	0.303^**	0.004	−0.028	0.009
	D/S	—	—	2.06	130	2.37	8.66	—	—	—
AK	Surface	0.178^*	0.240^**	−0.090	−0.039	−0.114	−0.064	−0.036	−0.027	−0.105
	Deep	0.104	0.106	−0.131	−0.156^*	−0.107	−0.128	0.036	0.030	0.008
	D/S	0.58	0.44	—	4.00	—	—	—	—	—
Climatic conditions, at least similar influences in the surface and deep soils
MAT	Surface	−0.349^**	−0.039	−0.297^**	0.068	−0.276^**	−0.026	−0.141	−0.080	−0.353^**
	Deep	−0.444^**	0.054	−0.414^**	0.114	−0.477^**	−0.008	−0.131	−0.046	−0.371^**
	D/S	1.27	—	1.39	—	1.73	—	—	—	1.05
MAP	Surface	0.123	0.500^**	−0.314^**	0.133	−0.348^**	0.023	−0.148	−0.065	−0.451^**
	Deep	0.136^*	0.526^**	−0.345^**	0.109	−0.274^**	0.176^*	−0.116	−0.059	−0.313^**
	D/S	1.11	1.05	1.10	—	0.79	7.65	—	—	0.69
Altitude	Surface	−0.031	0.256^**	−0.201^*	0.129	−0.185^*	0.046	−0.125	−0.082	−0.337^**
	Deep	0.051	0.429^**	−0.198^**	0.157^*	−0.165^*	0.185^**	−0.081	−0.045	−0.236^**
	D/S	—	1.67	0.99	1.22	0.89	4.02	—	—	0.70

Note: The same to Table 1. ** means that the coefficient was significant at p < 0.01, while * means that the coefficient was significant at p < 0.05. D/S means the ratio between deep soil to surface soil in the correlation coefficient.

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Table 4 Pearson correlations between glomalin features and soil physiochemical properties, nutrients and climatic conditions, and differences between the surface and deep soils.

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