Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, People's Republic of China.
Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, People's Republic of China; Department of Botany, Federal Urdu University of Arts, Science and Technology, Karachi, 75300, Pakistan.
Environ Pollut. 2020 Oct;265(Pt A):114861. doi: 10.1016/j.envpol.2020.114861. Epub 2020 May 29.
Phytoremediation coupled with agro-production is considered a sustainable strategy for remediation of trace element contaminated fields without interrupting crop production. In this study hyperaccumulator Sedum alfredii was intercropped with a leguminous plant fava bean (Vicia fava) in cadmium (Cd) and lead (Pb) co-contaminated field to evaluate the effects of intercropping on growth performance and accumulations of trace elements in plants with plant growth promoting endophyte (PGPE) consortium application. The results showed, compared with monoculture, intercropping coupled with inoculation application promoted biomass as well as Cd and Pb concentrations in individual parts of both plants, thus increasing the removal efficiencies of trace elements (4.49-folds for Cd and 5.41-folds for Pb). Meanwhile, this superposition biofortification measure maintained normal yield and nutrient content, and limited the concentration of Cd and Pb within the permissible limit (<0.2 mg kg FW) in fava bean during the grain production. These results demonstrated a feasible technical system for phytoremediation coupled with agro-production in slightly or moderately Cd and Pb co-contaminated field, and also provided useful information for further investigation of interaction mechanisms between intercropping and PGPEs inoculation.
植物修复与农业生产相结合被认为是一种可持续的策略，可用于修复微量元素污染的农田，而不会中断作物生产。本研究在镉（Cd）和铅（Pb）复合污染的农田中，将超积累植物景天与豆科植物蚕豆（Vicia fava）间作，以评估间作对植物生长促进内生菌（PGPE）联合体应用的生长性能和微量元素积累的影响。结果表明，与单作相比，间作结合接种应用促进了两种植物生物量以及各部位 Cd 和 Pb 浓度的增加，从而提高了微量元素的去除效率（Cd 提高了 4.49 倍，Pb 提高了 5.41 倍）。同时，这种超叠加生物强化措施在谷物生产过程中维持了蚕豆的正常产量和养分含量，并将 Cd 和 Pb 的浓度限制在可允许范围内（<0.2 mg kg FW）。这些结果为轻度或中度 Cd 和 Pb 复合污染农田的植物修复与农业生产相结合提供了可行的技术系统，并为进一步研究间作与 PGPE 接种之间的相互作用机制提供了有用信息。
