Nutrient Release Pattern and Greenhouse-Grown Swiss Chard Response to Biochar Inoculated with Vermicast

Table 2

Mineral nutrient composition of the growing media components.

Nutrients	Biochar alone	DWB	SVB	VTB	Pro-BX
N (%)	0.570	0.540	0.640	0.610	0.630
Ca (%)	1.498	1.556	1.573	1.658	2.653
K (%)	0.039	0.042	0.049	0.050	0.033
P (%)	0.066	0.055	0.091	0.082	0.065
Mg (%)	0.156	0.165	0.175	0.171	0.217
Na (%)	0.037	0.037	0.052	0.051	0.028
B (mg/l)	17.01	16.93	18.82	17.85	17.37
Cu (mg/l)	15.90	15.30	11.99	10.95	24.62
Fe (mg/l)	550.32	1064.92	637.32	792.61	497.14
Mn (mg/l)	501.80	452.10	437.69	346.61	87.23
Zn (mg/l)	589.53	504.09	793.37	486.73	658.70

N, nitrogen; Ca, calcium; K, potassium; P, phosphorus; Mg, magnesium; Na, sodium; B, boron; Cu, copper; Fe, iron; Mn, manganese; Zn, zinc; DWB, deionized water-inoculated biochar; SVB, solid vermicast-inoculated biochar; VTB, vermicast tea-inoculated biochar; Pro-BX, Promix-BX.