Effect of fertilizers on the Cd uptake of two sedum species (Sedum spectabile Boreau and Sedum aizoon L.) as potential Cd accumulators

• Published in: Ecological engineering 2017-09, Vol.106, p.409-414
• Main Authors: Guo, Jun-mei, Lei, Mei, Yang, Jun-xing, Yang, Jun, Wan, Xiao-Ming, Chen, Tong-Bin, Zhou, Xiao-Yong, Gu, Song-Pu, Guo, Guang-Hui
• Format: Article
• Language: English
• Subjects: Accumulators; Bioaccumulation; Biological magnification; Biomass; Cadmium; Compound fertilizers; Fertilizer; Fertilizers; Field tests; Phytoremediation; Ratios; Sedum; Sedum aizoon; Sedum aizoon L; Sedum spectabile; Sedum spectabile Boreau; Shoots; Soil; Soil contamination; Soil pollution; Species; Stems; Studies; Tissue; Tissues; Uptake
• ISSN: 0925-8574; 1872-6992
• DOI: 10.1016/j.ecoleng.2017.04.069

A pot experiment was conducted to investigate the potential for cadmium (Cd) phytoextraction of two sedum species (Sedum spectabile Boreau and S. aizoon L.), as well as the effects of N, NP, and NPK fertilizers on the Cd uptake of the two sedum species grown in soil contaminated with 2.2 mg·kg−1 Cd for 60 d. Results showed that the Cd concentrations in S. spectabile and S. aizoon tissues ranged within 7.49–14.4 mg·kg−1 in leaves, 5.48–9.69 mg·kg−1 in stems, and 2.38–6.06 mg·kg−1 in roots. Moreover, the biomass and Cd concentrations of S. spectabile tissues were significantly higher than those of S. aizoon, thereby leading to a higher Cd uptake in shoots and bioconcentration factor than S. aizoon. N and NP fertilizers had limited effects on the biomass and Cd phytoextraction efficiency of both sedum species. NPK fertilizers significantly increased the S. spectabile biomass by 21.2% compared with the control (p