Evaluation of Phytoavailability of Heavy Metals to Chinese Cabbage (Brassica chinensis L.) in Rural Soils

Table 1

Description of the studied soils.

Soil code	Classification	Texture	Parent materials	Land use	Contamination with heavy metal
A	Typic Hapludox	Clay	Quaternary aged alluvium	Tropical orchard	Spiked Cd and Pb for 1 yr
B	Typic Paleudult	Sandy clay loam	Quaternary aged alluvium	Grass	Low
C	Typic Melanudand	Silty clay loam	Volcanic ash	Secondary tropical forest	Low
D	Typic Hapludult	Clay loam	Quaternary aged alluvium	Sugarcane	Low
E	Typic Udorthent	Sandy clay loam	Andesite and limestone	Grass	Low
F	Typic Fluvaquent	Silty clay loam	Slate alluvium	Lowland rice	Moderate
G	Typic Paleudalf	Silty clay loam	Slate alluvium	Soybean	Low
H	Typic Eutrudept	Silty clay loam	Slate alluvium	Lowland rice	High
I	Typic Paleudalf	Clay loam	Sandstone and shale alluvium	Sugarcane	Low
J	Typic Paleudalf	Loam	Coral reef and sandstone mixture	Virgin tropical forest	Low
K	Typic Hapludert	Clay loam	Serpentine	Secondary tropical forest	Endogenous Cr and Ni
L	Typic Eutrudept	Silty clay loam	Slate alluvium	Vineyard	Low
M	Typic Udorthent	Loam	Slate alluvium	Corn	Low
N	Lithic Udipsamment	Loam	Slate alluvium	Sugarcane	Low
O	Typic Eutrudept	Silty clay loam	Slate and sandstone alluvium	Tropical orchard	Low
P	Typic Udorthents	Sandy clay loam	Slate alluvium	Melon	Low
Q	Lithic Udorthent	Sandy loam	Schist alluvium	Sugarcane	Low
R	Typic Udorthents	Sandy loam	Sandstone and shale alluvium	Vegetable	Low
S	Typic Hapludalf	Clay loam	Coral reef	Secondary tropical forest	Low
T	Lithic Udipsamment	Sandy loam	Slate alluvium	Fallow	High
U	Typic Urothent	Silt loam	Slate alluvium	Fallow	High
V	Typic Urothent	Clay loam	Mudstone	Soybean	Low