Shangrao Normal University, Shangrao, 334000, China.
Shangrao Vocational and Technical College, Shangrao, 334109, China.
J Hazard Mater. 2020 Jan 5;381:121004. doi: 10.1016/j.jhazmat.2019.121004. Epub 2019 Aug 13.
The effects of phosphate rock (PR), bone charcoal (BC), single superphosphate (SSP) and calcium magnesium phosphate (CMP) on rice growth and bacterial community structure in mining area of heavy and light rare earth elements(REEs) were studied by pot experiment, field experiments were conducted with CMP and BC as restorative materials. The pot experiment showed that BC, SSP and CMP improved dry weight of rice (especially grains) in two places by 84.23%, 116.97%, 81.83%, 1630.77%, 1817.95% and 902.56% respectively; and reduced REE content of rice (especially roots) in two places by 28.19%, 81.67%, 90.58%, 67.87%, 81.72% and 94.81%; PR had little effect on dry weight and REE content of rice in both places, but reduces Bacillusabundance in both places, while BC significantly improved the abundance of Perlucidibaca and Bacillus; CMP had little effect on bacterial community, two-year field experiments showed that dry weight of rice grain treated with BC was 100% and 43.0% higher than that treated with CK and CMP, and the content of REEs was 91.8% and 16.8% lower than that with CK and CMP. The results of pot and field experiments both show BC is the most potential material for restoring soil-plant ecosystem in REE mining area.
采用盆栽试验研究了磷矿石（PR）、骨炭（BC）、过磷酸钙（SSP）和钙镁磷肥（CMP）对重稀土和轻稀土矿区水稻生长和细菌群落结构的影响，并以 CMP 和 BC 为修复材料进行了田间试验。盆栽试验表明，BC、SSP 和 CMP 分别使两地水稻（尤其是稻谷）干重提高 84.23%、116.97%、81.83%、1630.77%、1817.95%和 902.56%；降低两地水稻（尤其是根系）REE 含量 28.19%、81.67%、90.58%、67.87%、81.72%和 94.81%；PR 对两地水稻干重和 REE 含量影响不大，但降低两地芽孢杆菌丰度，而 BC 显著提高 Perlucidibaca 和芽孢杆菌丰度；CMP 对细菌群落影响不大，两年田间试验表明，BC 处理的水稻稻谷干重比 CK 和 CMP 分别高 100%和 43.0%，REE 含量比 CK 和 CMP 分别低 91.8%和 16.8%。盆栽和田间试验结果均表明，BC 是修复重稀土矿区土壤-植物生态系统最有潜力的材料。
