Table 4.

The evaluation of heavy metal pollution degree.

Element	CSGB				CP
	Max	PI	L	PN	Max	PI	L	PN
Cd	0.2008	0.0667	0.0768 d	0.1864	0.0201	0.0053	0.0812 c	0.0275
Hg	0.0500		0.0000 e		0.005		0.0000 d
As	0.2926		0.0845 c		0.0732		0.0845 b
Cr	0.3520		0.0912 b		-		-
Pb	0.2600		0.0982 a		0.0104		0.0982 a

Key: Max is the maximum Pi value of heavy metals; L values of different heavy metals in coix seed with different letters are significantly different (p < 0.05); PI, average pollution index.