生物炭
环境修复
土壤肥力
修正案
土壤水分
土壤质量
环境化学
酸杆菌
土壤改良剂
土壤污染
土壤pH值
环境科学
农学
化学
放线菌门
污染
土壤科学
生态学
生物
热解
有机化学
基因
法学
生物化学
16S核糖体RNA
政治学
作者
Runhua Zhang,Yanlan Xie,Guolin Zhou,Zhiguo Li,Anhua Ye,Xiaoqiao Huang,Yizhen Xie,Lingfang Shi,Xiupeng Cao,Mengjie Zhang,Chufa Lin
标识
DOI:10.1016/j.ecoenv.2022.114316
摘要
Biochar, a cost-effective amendment, has been reported to play pivotal roles in improving soil fertility and immobilizing soil pollutants due to its well-developed porous structure and tunable functionality. However, the properties of biochar and soils can vary inconsistently after field application. This may affect the remediation of biochar on heavy metal (HM)-contaminated soil being altered. Therefore, we selected lettuce as a model crop to determine the effects of short-term, long-term, and reapplication of biochar on soil physicochemical properties, microbial community, HM bioavailability, and plant toxicity. Our investigation revealed that the long-term application of biochar remarkably improved soil fertility, increased the relative abundance of the phylum Proteobacteria which was highly resistant to HMs, and reduced the abundance of phylum Acidobacteria. These changes in soil properties decreased the accumulation of Cd and Pb in lettuce tissues. The short- and long-term applications of biochar had no substantial effects on biomass, quality, and photosynthesis of lettuce. Moreover, the short-term and reapplication of biochar had no significant effects on soil bacterial communities but decreased the accumulation of Cd and Pb in lettuce tissues. It showed that the changes in the physical, chemical, and biological properties of soil after long-term application of biochar promoted the remediation of HM-contaminated soil. Furthermore, microbial community compositions varied with metal stress and biochar application, while the relative abundance of the phylum Actinobacteria in HM-contaminated soil with long-term biochar application was markedly higher than in HM-contaminated soil without biochar application.
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