Cupriavidus B-7 immobilized biochar:an effective solution for Cd accumulation alleviation and growth promotion in pakchoi(Brassica Chinensis L.)  

作　　者：Yefang Sun Da Ouyang Yiming Cai Ting Guo Mei Li Xinlin Zhao Qichun Zhang Ruihuan Chen Fangzhen Li Xiujuan Wen Lu Xie Haibo Zhang 

机构地区：[1]Sino-Spain Joint Laboratory for Agricultural Environment Emerging Contaminants of Zhejiang Province,School of Environment and Resources,Zhejiang Agriculture and Forestry University,Hangzhou 311300,China. [2]Shaoxing Academy of Agricultural Sciences,Shaoxing 312003,China. [3]Key Laboratory of Environmental Pollution Control Technology Research of Zhejiang Province,Eco-Environmental Science Research and Design Institute of Zhejiang Province,Hangzhou 310007,China. [4]Institute of Bast Fiber Crops,Chinese Academy of Agricultural Sciences,Changsha 410205,China. [5]School of Environment and Resources,Zhejiang University,Hangzhou 310007,China. [6]College of Life and Environmental Science,Wenzhou University,Wenzhou 325035,China.

出　　处：《Biochar》2024年第1期804-817,共14页生物炭(英文)

基　　金：supported by the National Natural Science Foundation of China[Grant Numbers:42177021 and 42207012];the Special Support Program for high-level Talents of Zhejiang Province[Grant Numbers:2022R52015];Natural Science Foundation of Zhejiang Province[Grant Numbers:LZ24D010001 and LQ24D030002];Key Laboratory of Environmental Pollution Control Technology Research of Zhejiang Province[Grant Numbers:2021ZEKL09].

摘　　要：Cd contamination,especially in farmland soil,can pose serious threats to human health as well as ecological security.Stabilization is an important strategy for agricultural soil Cd remediation.In this study,a Cd-resistant strain(Cupriavi-dus B-7)was isolated and loaded onto cow manure(CDB),rice straw(RSB)and pine wood biochar(PB)to investigate its effects on Cd stabilization by a 60-day pot experiment.Results indicated that the Cupriavidus B-7-loaded biochar(labelled as CDBB,PBB and RSBB)reduced the CaCl_(2)-extractable Cd by 43.06-59.78%,which was significantly superior to individual applications of Cupriavidus B-7 and biochar.Likewise,the soil physicochemical properties,urease,catalase and phosphatase activities were improved,indicating improved soil health.Consequently,dry weights of pakchoi’s shoot and root were increased by 938.9-1230.9%and 149.1-281.2%,respectively,by applying CDBB,PBB and RSBB.Meanwhile,the Cd accumulation in pakchoi shoots decreased by 38.06-50.75%.Notably,the RSBB exhibited an optimal performance on pakchoi growth promotion and Cd accumulation alleviation.The structural equation model indicated the synergistic effect on pakchoi growth promotion and Cd accumulation decreased between biochar and Cupriavidus B-7.Our research provides some new insights into the development of strategies for green and sustainable remediation of Cd-contaminated soil.

关 键 词：Biochar loaded bacteria BIOREMEDIATION BIOAVAILABILITY Cadmium UPTAKE 

分 类 号：S15[农业科学—土壤学]