Fresh weight and absorption of heavy metals by pakchoi cabbage under different levels of amendments^a.

Treatments	Root fresh weight (g)	Root heavy metal (mg kg−1 FW)				Shoot fresh weight (g)	Shoot heavy metal (mg kg−1 FW)
		Cd	Zn	Cu	As		Cd	Zn	Cu	As
T0	2.25 ± 0.14d	0.51 ± 0.03a	14.43 ± 0.13a	10.18 ± 0.04a	1.91 ± 0.09a	35 ± 3e	0.71 ± 0.06a	11.26 ± 0.23a	6.67 ± 0.17a	0.08 ± 0.007d
T1	3.15 ± 0.11c	0.35 ± 0.01d	9.55 ± 0.04e	4.77 ± 0.01de	1.05 ± 0.04c	46 ± 2d	0.51 ± 0.04b	9.96 ± 0.27b	2.96 ± 0.04e	0.06 ± 0.002f
T2	3.29 ± 0.14bc	0.34 ± 0.01d	9.58 ± 0.44e	5.01 ± 0.01c	0.96 ± 0.04cd	52 ± 3c	0.41 ± 0.04de	8.56 ± 0.01f	3.50 ± 0.17c	0.07 ± 0.004e
T3	4.12 ± 0.09a	0.28 ± 0.01f	9.27 ± 0.03e	4.06 ± 0.01f	0.60 ± 0.05g	56 ± 4ab	0.35 ± 0.03f	7.89 ± 0.20h	2.23 ± 0.04g	0.09 ± 0.002cd
T4	3.25 ± 0.13bc	0.38 ± 0.02bc	12.00 ± 0.01bc	6.47 ± 0.08b	1.57 ± 0.04b	52 ± 2c	0.49 ± 0.03bc	9.67 ± 0.05c	3.84 ± 0.20b	0.07 ± 0.002ef
T5	3.42 ± 0.14b	0.35 ± 0.01d	11.83 ± 0.01c	4.89 ± 0.01cd	0.87 ± 0.10de	56 ± 2ab	0.42 ± 0.02de	8.31 ± 0.17g	3.28 ± 0.01d	0.09 ± 0.011c
T6	4.37 ± 0.11a	0.31 ± 0.01c	10.14 ± 0.45d	4.99 ± 0.41 cd	0.82 ± 0.05ef	57 ± 2a	0.37 ± 0.02ef	7.91 ± 0.02h	2.46 ± 0.02f	0.10 ± 0.002b
T7	3.14 ± 0.14c	0.40 ± 0.01b	12.25 ± 0.01b	4.13 ± 0.02f	0.73 ± 0.07f	51 ± 2c	0.53 ± 0.04b	9.18 ± 0.02d	3.83 ± 0.09b	0.09 ± 0.002c
T8	3.29 ± 0.12bc	0.36 ± 0.01 cd	10.41 ± 0.01d	4.63 ± 0.04e	0.78 ± 0.03ef	53 ± 2bc	0.44 ± 0.03cd	8.88 ± 0.01e	3.14 ± 0.06fe	0.11 ± 0.003ab
T9	4.17 ± 0.32a	0.34 ± 0.01d	11.99 ± 0.01bc	4.87 ± 0.01cd	0.76 ± 0.01f	58 ± 2a	0.38 ± 0.01f	8.19 ± 0.01i	2.78 ± 0.05g	0.11 ± 0.004a

^aDifferent letters in the same column indicate significant differences (P < 0.05).