title: Effects of mulching tolerant plant straw on soil surface on growth and cadmium accumulation of Galinsoga parviflora.
abstract: Pot and field experiments were conducted to study the effects of mulching with straw of cadmium (Cd) tolerant plants (Ranunculus sieboldii, Mazus japonicus, Clinopodium confine and Plantago asiatica) on growth and Cd accumulation of Galinsoga parviflora in Cd-contaminated soil. In the pot experiment, mulching with M. japonicus straw increased the root biomass, stem biomass, leaf biomass, shoot biomass, plant height and activities of antioxidant enzymes (superoxide dismutase, peroxidase and catalase) of G. parviflora compared with the control, whereas mulching with straws of R. sieboldii, C. confine and P. asiatica decreased these parameters. Straws of the four Cd-tolerant plants increased the Cd content in roots of G. parviflora compared with the control. However, only straws of M. japonicus and P. asiatica increased the Cd content in shoots of G. parviflora, reduced the soil pH, and increased the soil exchangeable Cd concentration. Straw of M. japonicus increased the amount of Cd extraction in stems, leaves and shoots of G. parviflora by 21.11%, 29.43% and 24.22%, respectively, compared with the control, whereas straws of the other three Cd-tolerant plants decreased these parameters. In the field experiment, the M. japonicus straw also increased shoot biomass, Cd content in shoots, and amount of Cd extraction in shoots of G. parviflora compared with the control. Therefore, straw of M. japonicus can be used to improve the Cd extraction ability of G. parviflora from Cd-contaminated soil.
authors.affiliation: College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan 625014, China; Ya'an Soil and Water Conservation Monitoring Substation, Ya'an, Sichuan 625000, China.
authors.forename: Lijin
authors.initials: L
authors.lastname: Lin
authors.affiliation: College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan 625014, China.
authors.forename: Ming'an
authors.initials: M
authors.lastname: Liao
authors.affiliation: College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan 625014, China.
authors.forename: Yajun
authors.initials: Y
authors.lastname: Ren
authors.affiliation: College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan 625014, China.
authors.forename: Li
authors.initials: L
authors.lastname: Luo
authors.affiliation: College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan 625014, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Zhang
authors.affiliation: College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan 625014, China.
authors.forename: Daiyu
authors.initials: D
authors.lastname: Yang
authors.affiliation: College of Horticulture, Sichuan Agricultural University, Ya'an, Sichuan 625014, China.
authors.forename: Jing
authors.initials: J
authors.lastname: He
mesh_terms: D057914:Agricultural Irrigation; D019659:Asteraceae / Q000254:growth & development* / Q000378:metabolism*; D001673:Biodegradation, Environmental; D018533:Biomass; D002104:Cadmium / Q000032:analysis* / Q000302:isolation & purification; D018515:Plant Leaves / Q000254:growth & development / Q000378:metabolism; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism; D018520:Plant Shoots / Q000254:growth & development / Q000378:metabolism; D018547:Plant Stems / Q000254:growth & development / Q000378:metabolism; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium