Effects of Mulching with Cadmium Tolerant Plant Straws on Growth and Cadmium Accumulation of Capsella Bursa-pastoris in Cadmium Contaminated Soil
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    Abstract:

    [Objective] The objective of this paper is to study the effect of mulching with straws of four cadmium tolerant species on heavy metal accumulation of accumulator in order to select cadmium tolerant species which can promote the growth cadmium accumulation of Capsella bursa-pastoris. [Methods] A pot experiment was conducted to study the effects of mulching with straws of four cadmium tolerant species (Ranunculus sieboldii, Mazus japonicus, Clinopodium confine and Plantago asiatica) on growth and cadmium accumulation of Capsella bursa-pastoris in Cd-contaminated soil. [Results] The soil mulching with R. sieboldii, M. japonicus, C. confine and P. asiatica straws reduced the shoot biomass, total biomass and leaf SPAD value of C. bursa-pastoris compared with control. Compared with control, the soil mulching with R. sieboldii, M. japonicus, C. confine and P. asiatica straws reduced the whole biomass of C. bursa-pastoris by 37.61%, 52.14%, 43.76% and 21.71% respectively. Only C. confine straw increased the cadmium content in root of C. bursa-pastoris, and R. sieboldii and M. japonicus straws increased the cadmium content in shoot of C. bursa-pastoris by 18.61% and 12.87% respectively. The cadmium exactions in root, shoot and whole plant of C. bursa-pastoris decreased when mulched with four cadmium tolerant plant straws. [Conclusion] The soil mulching with four cadmium tolerant plant (Ranunculus sieboldii, Mazus japonicus, Clinopodium confine and Plantago asiatica) straws cannot enhance the ability of Capsella bursa-pastoris to remedy cadmium contaminated soil under pot experiment conditions.

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王恒,石军,林立金,杨代宇,黄科文,张潇.耐性植物秸秆覆盖对荠菜生长及镉积累的影响[J].水土保持通报英文版,2016,36(1):184-187

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History
  • Received:October 23,2014
  • Revised:December 17,2014
  • Adopted:
  • Online: April 15,2016
  • Published: