Associations between forest vegetation and the fertility of soil organic horizons in northwestern Russia

Natalia V. Lukina; Elena V. Tikhonova; Maria A. Danilova; Olga N. Bakhmet; Aleksandr M. Kryshen; Daria N. Tebenkova; Anastasia I. Kuznetsova; Vadim E. Smirnov; Tatiana Yu Braslavskaya; Aleksey V. Gornov; Maksim P. Shashkov; Svetlana V. Knyazeva; Anton D. Kataev; Ludmila G. Isaeva; Natalia V. Zukert

doi:10.1186/s40663-019-0190-2

Forest Ecosystems

Table 7 Characteristics of the fertility of soil organic horizons in Sukachev’s forest types within the Cajander’s forest site types 2–4

From: Associations between forest vegetation and the fertility of soil organic horizons in northwestern Russia

Parameters	v-test			Mean in category			Standard deviation in category			Overall mean	Overall standard deviation	p-value
Parameters	pine (n = 66)	spruce (n = 37)	birch (n = 16)	pine (n = 66)	spruce (n = 37)	birch (n = 16)	pine (n = 66)	spruce (n = 37)	birch (n = 16)	Overall mean	Overall standard deviation	pine (n = 66)	spruce (n = 37)	birch (n = 16)
2-OMT (pine n = 7, spruce n = 7, birch n = 4)
pH CaCl₂	− 1.62	0.16	1.71	3.42	3.70	4.08	0.57	0.40	0.44	3.67	0.52	0.105	0.872	0.087
pH H₂O	−0.89	− 0.75	1.93	4.38	4.40	4.96	0.61	0.24	0.50	4.52	0.50	0.372	0.452	0.054
Total C (g∙kg^− 1)	0.54	0.54	0.43	427	427	430	107	107	37.13	411	99	0.590	0.590	0.667
Total N (g∙kg^− 1)	1.88	1.88	0.82	15.9	15.9	15.1	2.00	2.00	4.70	13.66	3.95	0.060	0.060	0.410
С/N	2	−2	0	37	27	30	11	6	8	32	10	0.054	0.102	0.730
Exchangeable acidity^a	1.47	−0.83	−0.75	5.14	3.66	3.47	2.83	1.31	1.60	4.19	2.12	0.141	0.405	0.453
Exchangeable Ca^a	−2.41	0.77	1.92	12.0	18.1	22.2	1.33	5.97	7.64	16.6	6.38	0.016	0.443	0.054
Exchangeable Mg^a	−1.67	−0.67	2.74	2.06	2.93	7.09	0.44	1.66	4.26	3.52	2.88	0.095	0.503	0.006
Exchangeable K^a	0.47	− 0.93	0.54	3.20	2.83	3.29	1.05	0.86	0.68	3.08	0.88	0.641	0.355	0.591
Exchangeable Na^a	−0.15	1.01	−1.00	0.11	0.12	0.09	0.03	0.04	0.05	0.11	0.04	0.879	0.314	0.317
Exchangeable Al^a	2.10	−0.45	−1.94	1.47	0.84	0.23	1.05	0.33	0.07	0.95	0.82	0.036	0.652	0.053
Exchangeable Mn^a	−2.71	0.60	2.48	0.60	1.18	1.73	0.30	0.46	0.41	1.08	0.58	0.007	0.549	0.013
BS (%)	−1.95	0.68	1.48	77.8	85.4	89.8	10.6	7.71	5.64	83.4	9.54	0.052	0.494	0.139
Extractable P (mg∙kg⁻¹)	−2.69	0.72	2.31	616	842	1022	108	140	238	794	217	0.007	0.470	0.021
3-MT (pine n = 17, spruce n = 23, birch n = 8)
pH CaCl₂	−2.14	−0.23	3.06	3.38	3.58	4.14	0.38	0.44	0.74	3.60	0.54	0.032	0.818	0.002
pH H₂O	−1.96	−0.20	2.79	4.34	4.53	5.02	0.31	0.49	0.72	4.55	0.53	0.050	0.839	0.005
Total C (g∙kg⁻¹)	2.37	−0.66	−2.16	412	360	303	75.5	84.5	115	369	93.2	0.018	0.510	0.031
Total N (g∙kg⁻¹)	−1.68	1.84	−0.31	10.7	12.5	11.4	3.36	2.78	2.11	11.7	2.97	0.093	0.066	0.753
С/N	3	−2	−1	44	30	27	27	8	10	34	19	0.007	0.094	0.219
Exchangeable acidity	2.44	−0.82	−2.04	4.92	3.84	2.87	1.79	1.63	1.46	4.06	1.78	0.015	0.414	0.041
Exchangeable Ca	−2.15	0.73	1.78	11.8	14.7	17.2	3.13	5.09	8.14	14.1	5.39	0.031	0.465	0.074
Exchangeable Mg	−2.76	0.53	2.83	2.07	3.08	4.44	0.92	1.42	2.18	2.95	1.61	0.006	0.596	0.005
Exchangeable K	−0.54	0.27	0.33	2.65	2.75	2.79	0.61	0.55	0.93	2.72	0.64	0.592	0.789	0.742
Exchangeable Na	0.78	0.11	−1.15	0.11	0.11	0.09	0.04	0.05	0.04	0.10	0.05	0.436	0.910	0.250
Exchangeable Al	2.33	−1.27	−1.30	1.62	0.84	0.56	1.70	0.73	0.42	1.07	1.20	0.020	0.205	0.195
Exchangeable Mn	−1.35	1.18	0.15	0.85	1.10	1.03	0.57	0.58	0.57	1.00	0.58	0.177	0.238	0.879
BS (%)	−2.83	1.14	2.11	76.5	83.3	88.0	9.11	8.07	7.69	81.7	9.23	0.005	0.254	0.035
Extractable P (mg∙kg⁻¹)	−2.04	1.50	0.61	702	798	794	99	183	127	763	153	0.041	0.134	0.541
4-VT (pine n = 36, spruce n = 5, birch n = 4)
pH CaCl₂	−1.94	−0.21	2.96	3.30	3.32	3.88	0.32	0.49	0.17	3.35	0.37	0.052	0.835	0.003
pH H₂O	−2.01	− 0.19	3.04	4.30	4.33	4.97	0.36	0.42	0.44	4.36	0.41	0.044	0.848	0.002
Total C (g∙kg⁻¹)	2.87	−0.64	−3.33	408	369	263	63	48	132	391	79.9	0.004	0.524	0.001
Total (Ng∙kg⁻¹)	− 0.66	−0.08	1.02	9.31	9.35	10.6	2.23	2.44	3.20	9.43	2.31	0.510	0.934	0.309
С/N	3	−0.5	−3	46	41	24	12	7	7	44	13	0.009	0.626	0.002
Exchangeable acidity	2.45	−0.35	−3.05	5.03	4.40	1.94	1.66	1.92	1.43	4.68	1.86	0.014	0.725	0.002
Exchangeable Ca	−1.61	0.92	1.25	10.2	12.6	13.6	4.62	6.33	1.54	10.8	4.71	0.108	0.360	0.213
Exchangeable Mg	−1.56	−0.27	2.49	2.19	2.19	3.83	1.21	0.65	1.33	2.34	1.24	0.119	0.785	0.013
Exchangeable K	1.09	−1.46	0.08	2.22	1.77	2.19	0.63	0.43	0.85	2.16	0.63	0.276	0.145	0.938
Exchangeable Na	0.88	0.22	−1.48	0.14	0.14	0.09	0.06	0.08	0.08	0.13	0.06	0.381	0.825	0.140
Exchangeable Al	1.21	0.02	−1.72	1.26	1.17	0.29	1.12	0.76	0.07	1.16	1.06	0.228	0.986	0.086
Exchangeable Mn	−0.31	0.04	0.39	0.85	0.87	0.96	0.49	0.61	0.53	0.86	0.49	0.757	0.968	0.696
BS (%)	−2.25	0.35	2.78	72.4	76.5	91.5	11.8	13.5	4.89	74.6	12.6	0.025	0.729	0.005
Extractable P (mg∙kg⁻¹)	−1.48	1.78	0.12	721	864	749	132	253	275	739	164	0.138	0.075	0.905

^acmol(+)∙kg⁻¹

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