Study on the Effect of Cu (II) and Zn (II) on the Accumulation of Pb (II) from Soil to the Biomass of Vegetable

Table 6

Concentration of lead in this metal-contaminated soil and in the biomass of potato grown in this soil.

Entry	Lead content in soil^a	Lead content in the biomass of potatoes^b
		Stems and leaves			Tubers
		Range	Average	SD	Range	Average	SD
31	Background	0.14 ÷ 0.16	0.15	0.01	0.77 ÷ 0.92	0.84	0.08
32	100	0.26 ÷ 0.30	0.28	0.02	0.94 ÷ 1.12	1.02	0.09
33	200	0.44 ÷ 0.49	0.46	0.03	1.65 ÷ 1.94	1.79	0.15
34	300	1.47 ÷ 1.68	1.57	0.11	2.65 ÷ 2.99	2.75	0.22
35	400	1.51 ÷ 1.80	1.67	0.15	3.83 ÷ 4.18	3.85	0.32
36	600	1.84 ÷ 2.09	2.00	0.14	4.46 ÷ 5.12	4.79	0.33
37	800	2.59 ÷ 2.97	2.72	0.21	4.75 ÷ 5.47	5.17	0.37
38	1000	3.00 ÷ 3.51	3.22	0.26	5.21 ÷ 5.98	5.48	0.43
39	1200	3.14 ÷ 3.73	3.42	0.30	5.51 ÷ 6.36	5.81	0.48
40	1500	3.21 ÷ 3.60	3.35	0.22	5.78 ÷ 6.95	6.31	0.59

a, mg/kg of dried soil; b, mg/kg of fresh vegetable.