The Influence of Spent Mushroom Substrate Fertilization on The Selected Properties of Arable Soil

Figures & Tables

Experimental objects	pH_KCl	Hh	CEC	V	Corg	N-tot	C:N
Experimental objects	pH_KCl	mmol(+)·kg⁻¹		%	g·kg⁻¹		C:N
After first year of cultivation
Control	4.79	20.6	67.6	76.6	6.02	0.61	9.84
SMS	5.11	22.5	90.3	80.3	7.65	0.79	9.68
After second year of cultivation
Control	4.61	24.0	64.5	72,9	6.09	0.58	10.5
SMS	4.69	24.4	79.2	76,4	7.65	0.63	12.1

Experimental objects	N_OS		N_OEH		N_ODH		N_ONH
Experimental objects	g·kg⁻¹	% N-tot	g·kg⁻¹	% N-tot	g·kg⁻¹	% N-tot	g·kg⁻¹	% N-tot
First year of cultivation
Control	1.33	2.18	12.0	19.7	19.6	32.1	28.1	46.1
SMS	1.68	2.13	14.5	18.4	25.4	32.2	37.4	47.3
Second year of cultivation
Control	1.20	2.07	11.5	19.8	16.8	28.9	28.5	49.1
SMS	1.82	2.90	12.0	19.0	20.5	32.5	28.2	44.8

Dry matter (DM)	Corg	N-tot	C:N	pH_H20
g·kg⁻¹			C:N	pH_H20
309	278	23.3	11.9	7.25

Nitrogen form (operational)	Method of recovery
N-NH₄ – ammonium form	distillation from 0.25 M KCl extract after alkalization with MgO
N-NO_x – nitrate forms (III and V): N-NO₃ and N-NO₂	distillation from 0.25 M KCl extract after alkalization with N-NH₄ and application of Devards reductive mixture
N_MIN – nitrogen in mineral compounds	N_MIN = N-NH₄ +N-NO_x
N_ORG – nitrogen in organic compounds	N_ORG =N-tot. – N_MIN
N_KCl	measured in 0.25 M KCl extract after mineralization of the solution
N_OS – soluble organic nitrogen	N_OS =N_KCl – N_MIN
N_OEH – easily hydrolysing organic nitrogen	measured after hydrolysis in 0.25 M H₂SO₄ and mineralization of the solution
N_ODH – organic nitrogen difficult to hydrolyse	measured after hydrolysis in 2.5 M H₂SO₄ and mineralization of the solution
N_ONH – not hydrolysing organic nitrogen	measured after post-extraction and mineralization of the residues concentrated H₂SO₄

Experimental objects	N-NH₄		N-NO₃ and N-NO₂		N_MIN
Experimental objects	g·kg⁻¹	% N-tot	g·kg⁻¹	% N-tot	g·kg⁻¹	% N-tot
First year of cultivation
Control	1.68	2.75	1.19	1.95	2.87	4.70
SMS	1.75	2.22	1.05	1.33	2.80	3.55
Second year of cultivation
Control	1.54	2.65	0.98	1.69	2.52	4.34
SMS	1.96	3.13	1.10	1.58	3.06	4.68

Parameter	N-NH₄	N-NO_x	N_OS	N_OEH	N_ODH	N_ONH
N-tot	0.35	0.13	0.68^*	0.82^*	0.80^*	0.14
Corg	0.50	0.20	0.78^*	0.39	0.54	0.13
C:N	0.26	0.10	0.24	−0.44	−0.21	−0.03
pH_KCl	−0.23	−0.48	0.21	0.33	0.57	−0.51
Hh	0.36	0.31	0.31	0.20	−0.25	−0.71^*
CEC	0.58^*	0.20	0.67^*	0.72^*	0.70^*	−0.37
V	0.25	−0.02	0.38	0.43	0.73^*	−0.79^*

N-NH₄		N-NO₃ and N-NO₂		N_MIN
g·kg⁻¹	% N-tot	g·kg⁻¹	% N-tot	g·kg⁻¹	% N-tot
0.800	3.43	0.095	0.40	0.895	3.84

N_OS		N_OEH		N_ODH		N_ONH
g·kg⁻¹	% N-tot	g·kg⁻¹	% N-tot	g·kg⁻¹	% N-tot	g·kg⁻¹	% N-tot
2.81	12.0	4.29	18.4	4.15	17.8	11.5	47.8