Table 3.

The effect of foliar spray of Spirulina filtrate on the radish elemental composition (mg kg⁻¹ d.m.; N = 3)

Group		Commercial biostimulant (CB)		H2O (control)		Concentration of Spirulina filtrate
						5%		7%		10%		15%		20%		25%
Element/wavelength (nm)		Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Al	308.215	30.22	10.67	23.33	5.89	33.04	5.35	30.69	8.44	35.61	8.06	32.10	6.64	44.98	9.95	23.56	5.51
Ca	315.887	8688	1036	6538	1051	9637	442	9910	71	8650	946	10,568	2111	11,075	1268	7209	1942
Cr	267.716	1.023	0.260	0.5124	0.2200	0.6522	0.2750	1.073	0.817	0.8646	0.4653	0.3962	0.3366	1.328	0.679	0.8410	0.3084
Cu	324.754	11.32	1.82	8.927	0.898	11.53	1.09	11.56	0.10	11.37	1.03	11.16	3.24	11.60	0.98	8.759	1.894
Fe	259.94	127.1	15.5	107.8	10.6	129.6	20.3	127.0	3.1	130.8	16.8	134.1	16.0	157.1	19.3	121.1	15.7
K	766.491	8694	913	8284	942	13,086	1547	12,127	2662	15,119	1369	19,970	4406	21,216	2978	16,077	3470
Mg	285.213	5255	359	4177	496	5853	410	5900	324	5663	592	6236	706	6886	738	5324	706
Mn	257.61	44.77	7.85	33.77	4.17	42.97	2.04	43.00	6.93	39.12	4.63	41.63	8.56	45.18	4.78	34.80	6.42
Na	588.995	3204	1108	1716	914	2777	605	1193	244	5035	897	2813	948	4175	2479	3159	994
Ni	231.604	12.73	5.07	4.729	1.826	10.83	7.95	0.7609	LOD	9.046	LOD	8.771	4.377	26.52	28.11	7.920	5.326
P	213.618	14,758	848	12,855	1407	15,997	1032	15,186	392	15,095	1302	16,951	2084	19,594	1755	15,532	2586
S	181.972	22,784	1409	19,588	1756	21,912	1587	23,175	677	22,373	2546	22,917	2620	24,709	2125	22,756	2705
Si	251.611	55.43	21.01	48.61	25.82	75.58	32.50	76.04	16.00	76.04	38.95	65.76	30.53	62.37	12.53	55.94	10.05
Zn	213.857	98.66	11.19	80.56	8.952	111.7	14.2	112.5	5.7	124.5	17.6	122.6	29.1	124.6	9.9	90.64	19.44

LOD below limit of detection