title: Strategies for enhancing the phytoremediation of cadmium-contaminated agricultural soils by Solanum nigrum L.
abstract: Field trials contribute practical information towards the development of phytoremediation strategies that cannot be provided by laboratory tests. We conducted field experiments utilizing the Cd hyperaccumulator plant Solanum nigrum L., on farmland contaminated with 1.91 mg kg(-1) Cd in the soil. Our study showed that S. nigrum has a relatively high biomass. Planting density had a significant effect on the plant biomass and thus on overall Cd accumulation. For double harvesting, an optimal cutting position influenced the amount of Cd extracted from soils. Double cropping was found to significantly increase the amount of Cd extracted by S. nigrum. Fertilizing had no significant effect on plant biomass or on the Cd remediation of the soil over the short-term period. Our study indicates that S. nigrum can accumulate Cd from soils where the concentrations are relatively low, and thus has application for use in decontamination of slightly to moderately Cd-contaminated soil.
authors.affiliation: Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China.
authors.forename: Puhui
authors.initials: P
authors.lastname: Ji
authors.forename: Tieheng
authors.initials: T
authors.lastname: Sun
authors.forename: Yufang
authors.initials: Y
authors.lastname: Song
authors.forename: M Leigh
authors.initials: ML
authors.lastname: Ackland
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
mesh_terms: D000383:Agriculture / Q000379:methods; D018533:Biomass; D002104:Cadmium / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*; D002681:China; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005308:Fertilizers; D012987:Soil / Q000032:analysis / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*; D032324:Solanum nigrum / Q000737:chemistry / Q000378:metabolism*
chemical_list: D005308:Fertilizers; D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium