›› 2020, Vol. 32 ›› Issue (11): 2027-2034.DOI: 10.3969/j.issn.1004-1524.2020.11.13

• Environmental Science • Previous Articles     Next Articles

Effects of applying green waste compost on physiological characteristics of pakchoi in Pb, Zn contaminated soil

MA Qixue, SUN Xiangyang*, LI Suyan, LI Song, LIU Yuanxin, ZHOU Wenjie   

  1. College of Forestry, Beijing Forestry University, Beijing 100083, China
  • Received:2020-05-12 Online:2020-11-25 Published:2020-12-02

Abstract: To investigate the effects of green waste compost (GWC) on the physiological characteristics of pakchoi (Brassica chinensis L.) under heavy metal pollution, a greenhouse pot experiment was carried out. Soils of lead (Pb) contamination (500 mg·kg-1), zinc (Zn) contamination (1 000 mg·kg-1) and Pb-Zn combined contamination were amended with three levels of GWC (1%, 2%, 5%) to study the effects on the biomass, chlorophyll content, malondialdehyde (MDA) content, superoxide dismutase (SOD) and catalase (CAT) activity, and free proline content in pakchoi. The results showed that the biomass, chlorophyll content and free proline content of pakchoi increased with the increasing application rate of GWC, but MDA content decreased. The GWC application increased the CAT activity of pakchoi under Pb, Zn and Pb-Zn combined contamination. In conclusion, GWC could promote the growth of pakchoi, improve the physiological characteristics of pakchoi and enhance the resistance to the stress of Pb and Zn with appropriate application level.

Key words: green waste compost, Pb, Zn, pakchoi, oxidative stress

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