生物炭
根际
青枯病
青枯菌
农学
枯萎病
生物
人口
生物量(生态学)
微生物
园艺
化学
细菌
医学
微生物学
病菌
环境卫生
有机化学
遗传学
热解
作者
Chengjiang Li,Waqar Ahmed,Dafei Li,Liangjun Yu,Long Xu,Tianyang Xu,Zhengxiong Zhao
标识
DOI:10.1016/j.apsoil.2021.104314
摘要
Bacterial wilt caused by Ralstonia solanacearum is a devastating disease of flue-cured tobacco production. Amendments of biochar in soil suppress the incidence of bacterial wilt disease by improving soil health and functional diversity of rhizosphere microbes. In this study, we observed the effect of 0–5% application rate of tobacco stem biochar on soil health and the occurrence of tobacco bacterial wilt disease. Results demonstrated that the application of 2% tobacco stem biochar significantly improves soil physicochemical properties, microbial biomass carbon and nitrogen, and the functional diversity of microbes in the rhizosphere. The ability of rhizosphere microorganisms to utilize six types of carbon sources was significantly improved under the 2% application rate of tobacco stem biochar, which reduced the incidence of bacterial wilt disease and R. solanacearum population in the rhizosphere of tobacco plants. Biochar also increases the accumulation of dry matter contents in the roots, stems, and leaves of tobacco plant. We conclude that tobacco stem biochar at a certain level improves the soil physicochemical properties, functional diversity of rhizosphere microorganisms, mitigates the pathogen population, and reduces disease incidence. This study highlights the potential use of tobacco stem biochar to manage the bacterial wilt disease.
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