[Retracted] Chemical Characteristics of Coil Heavy Metal Elements and Ecological Security Risks Caused by Fertilization

Table 2

Statistics of soil heavy metal content in the research area (W_B/(mg/kg)).

Element	Mean ± standard deviation	Maximum	Minimum	Background value	Enrichment coefficient
Ni	21.80 ± 9.05	128.00	4.37	24.7	0.88
V	70.7 ± 17.9	223.00	16.70	79.2	0.89
Cr	55.5 ± 27.0	622.00	11.20	60.8	0.91
As	6.96 ± 2.80	30.40	1.85	7.7	0.90
Cd	0.144 ± 0.063	0.740	0.048	0.119	1.21
Pb	24.3 ± 5.27	77.90	12.20	23.7	1.03
Zn	67.7 ± 23.1	262.00	18.10	57.5	1.18
Hg	0.046 ± 0.133	3.740	0.007	0.059	0.78