[Intercropping with Woody Plants to Remediate Heavy Metal-Contaminated Soil].

A greenhouse experiment was conducted to study the potential of intercropping with or to remediate heavy metal-contaminated soil. The results showed that intercropping the herbaceous plant with woody plants or was beneficial for plant growth on heavy metal-contaminated soil. This can effectively enhance the comprehensive enrichment capacity of heavy metals and improve soil enzyme activities. The photosynthetic pigment contents in the leaves of , and decreased along with remediation time under monoculture treatment for each plant. However, compared with 90 d cultivation, the chlorophyll-a and carotenoid contents in leaves and chlorophyll-b and carotenoid contents in leaves under intercropping treatment after 270 d cultivation were only slightly changed. Furthermore, chlorophyll-a, chlorophyll-b, and carotenoid contents in leaves under intercropping treatment were significantly (<0.05) increased by 99.1%, 177.1%, and 119.9%, respectively, compared with monoculture-treated , and the total biomass of increased significantly (<0.05) by 26.1%. Compared with monoculture-treated , the total accumulation amounts of Pb and Zn in the shoots of combined plants was significantly (<0.05) enhanced by 171% and 124% under intercropping treatment of with . Compared with monoculture-treated and , the total accumulation amounts of As and Pb in the shoots of intercropped plants were significantly (<0.05) enhanced by 150% and 76.5%, respectively, under intercropping treatment of with . Moreover, the fractions of As, Cd, Pb, and Zn in contaminated soil slightly changed under intercropping treatment of with or , and soil urease, acid phosphatase, and total phosphatase activity was superior to part of the monoculture treatments after 270 d cultivation. The results further suggested that intercropping with or could be effectively used for heavy metal-contaminated soil remediation, while simultaneously improving the biological quality in contaminated soil.