Table 5.

Analysis of heavy metal contents in P. notoginseng cultivation soil (n = 37, mg·kg⁻¹).

Index	Safety Standard	Min	Max	Mean	Median	SD	Exceeded Standard
							No.	%
Pb	≤250	21.7	151.1	61.6	51.9	32.7	0	0.00
Cd	≤0.3	0.06	0.91	0.35	0.29	0.20	13	35.1
Cr	≤150	4.8	182.6	102.4	106.1	45.7	7	18.9
As	≤40	4.1	208.5	57.1	56.1	42.3	23	62.1
Hg	≤0.3	0.04	0.94	0.27	0.15	0.25	11	29.7
Cu	≤50	10.1	65.3	35.1	37.7	13.8	3	8.1