超富集植物与能源植物间作对 Cd、Pb、Zn 累积的影响

作者：Zhang Xingfeng; Wu Ping; Feng Jianfei; Guo Yuehong; Gao Bo^*

来源：农业环境科学学报, 2021, 40(9): 1481-1491.

DOI：10.11654/jaes.2020-1415

• Energy plants
• Heavy metals
• Intercropping
• Phytoremediation
• Pterocypsela indica
• Solanum photeinocarpum

Intercropping is an important measure for phytoremediation coupled with agro-production. In this study, hyperaccumulators （Solanum photeinocarpum and Pterocypsela indica）and energy plants（Pennisetum americanum × P. thyphoideum and Sorghum bicolor）were mutually intercropped in pots to study the effects of intercropping on the co-remediation of Cd-, Pb-, and Zn-contaminated soil. The results showed that intercropping had no significant effect on soil organic matter; however, it did increase the content of available Cd, Pb, and Zn. Compared to the respective monoculture, the dry weights of Sol. photeinocarpum and Pt. indica were significantly increased under intercropping; however, the biomasses of the two energy plants were significantly decreased. Sol. photeinocarpum intercropped with the Pe. americanum × P. thyphoideum treatment significantly increased the Cd and Zn content in the shoots of Pe. americanum × P. thyphoideum. Pt. indica intercropped with Pe. americanum × P. thyphoideum treatment significantly increased the Cd and Zn content in the shoots of the two plants. The accumulation of Cd and Zn in the shoots of the two plants was significantly increased by P. indica intercropped with Pe. americanum × P. thyphoideum. In a single pot, the maximum values of Cd and Zn accumulation were produced by Pt. indica intercropped with Pe. americanum × P. thyphoideum（397.65 μg · pot-1 for Cd and 4 169.42 μg · pot-1 for Zn）, followed by Sol. photeinocarpum intercropped with Pe. americanum × P. thyphoideum. Pb accumulation was the highest in Sol. photeinocarpum intercropped with Pe. americanum × Pe. thyphoideum（158.28 μg · pot-1 for Pb）. Pb accumulation in the intercropping of Pt. indica and Pe. americanum × P. thyphoideum was 98.17 μg · pot-1. Therefore, Pt. indica intercropped with Pe. americanum × P. thyphoideum and Sol. photeinocarpum intercropped with Pe. americanum × Pe. thyphoideum can improve the phytoremediation efficiency of Cd-, Pb-, and Zn-contaminated soils. ? 2021 Editorial Board of Journal of Agro-Environment Science.

• 单位
  桂林理工大学