Table 1.
Soil chemical properties of rice paddies in Zhangjiagang County, Jiangsu.
Figure 1.
The percentage distribution of each metal fraction in reduced condition in paddy soil samples in Zhangjiagang County.
L means lower pH (<6), M means moderate pH (6–7), H means higher pH (>7). Note: significant interactions within and between factors are presented in Table 2.
Figure 2.
The percentage distribution of each metal fraction in oxidized condition in paddy soil samples in Zhangjiagang County.
L means lower pH (<6), M means moderate pH (6–7), H means higher pH (>7). Note: significant interactions within and between factors are presented in Table 2.
Table 2.
P-values from the analysis of variance of redox conditions and pH for heavy metal fraction distributions.
Figure 3.
Correlation between the percentage distribution of iron and manganese bound nickel (Nireducible fraction) and residual lead (Pbresidual fraction) in oxidized and reduced paddy soil samples in Zhangjiagang County.
*, and ** denote the significant correlation at p≤0.05 and 0.01, respectively.
Figure 4.
Correlation between the percentage distribution of cadmium in oxidized and reduced paddy soil samples in Zhangjiagang County.
*, and ** denote the significant correlation at p≤0.05 and 0.01, respectively.