文献类型：期刊文献

英文题名：Bamboo biochar greater enhanced Cd/Zn accumulation in Salix psammophila under non-flooded soil compared with flooded

作者：Li, Xiaogang[1] Cao, Yini[2] Xiao, Jiang[1] Salam, Mir Md Abdus[3,4] Chen, Guangcai[1]

第一作者：Li, Xiaogang

通信作者：Chen, GC[1]|[a000551c9abd7c3960d59]陈光才;

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, 73 Daqiao Rd, Hangzhou 311400, Zhejiang, Peoples R China;[2]Guangdong Univ Technol, Key Lab City Cluster Environm Safety & Green Dev, Minist Educ, Sch Ecol Environm & Resources, Guangzhou 510006, Peoples R China;[3]Univ Eastern Finland, Sch Forest Sci, Yliopistokatu 7,POB 111, Joensuu 80100, Finland;[4]Nat Resources Inst Finland LUKE, Yliopistokatu 6B, Joensuu 80100, Finland

年份：2022

卷号：4

期号：1

外文期刊名：BIOCHAR

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000751316800001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 32071736), and the Fundament Research Funds of Chinese Academy of Forestry (CAFYBB2019SZ001).

语种：英文

外文关键词：Heavy metals; Amendment; Salix; Phytoremediation; Soil flooding

摘要：As a metal immobilizer, biochar can be used to remediate contaminated soil. Biochar's effect on the phytoremediation process in flooded conditions under a scenario of increasing flooding frequency as global climate change is not well understood. This study investigated bamboo biochar (BBC) effects on growth and metal accumulation of Salix in multi-metal contaminated soil under non-flooded versus flooded conditions. Salix cuttings were cultivated in pots with severely contaminated soil by Cd and Zn, for 120 days, with four treatments including non-flooded treatment, flooded treatment, non-flooded with 3% BBC application (BBC/soil, w/w), and flooded with 3% BBC addition. BBC, flooding, and BBCx flooding significantly decreased the bioavailability of metals in soils (P < 0.05). The BBC addition markedly stimulated Cd concentration in leaves under non-flooded (94.20%) and flooded conditions (32.73%) but showed little effect on roots. The BBC significantly boosted Cd and Zn transport from roots to aboveground parts by 68.85% and 102.27% compared with no BBC amendment under non-flooded treatment, while showing insignificant changes under flooded treatment. Although the plant biomass was little affected, BBC significantly increased Cd and Zn accumulation in the whole plant by 52.53% and 28.52% under non-flooded while showing an insignificant impact under flooded conditions. Taken together, BBC enhanced the phytoremediation efficiency of Salix to Cd and Zn in severely polluted non-flooded soil, while flooding offset this effect. The results indicated the effects of BBC varied under different soil moisture, which should be considered in the biochar-assisted phytoremediation to variable and complex environments. [GRAPHICS] .