Lead (Pb), a potentially toxic heavy metal with no known biological function, has
attracted more and more considerable attention for its widespread distribution and potential
risk to the environment. Pb contamination in soils not only aroused the changes of soil microorganism and its activities and resulted in soil fertility deterioration but also directly
affected the change of physiological indices and, further more, resulted in yield decline
(Majer et al., ). Ultimately, lead enriched in the body of humans through the food
chain and endangered their health (Liu et al., ). Soil microbial activity has a great
potential as an early and sensitive indicator of stress in soil and has been employed in
national and international monitoring programs