Soil inorganic carbon(SIC)accounts for about half of the C reserves worldwide and is considered more stable than soil organic carbon(SOC).However,soil acidification,driven mainly by nitrogen(N)fertilization can accelerate SIC losses,possibly leading to complete loss under continuous and intensive N fertilization.Carbonate-free soils are less fertile,productive,and more prone to erosion.Therefore,minimizing carbonate losses is essential for soil health and climate change mitigation.Rock/mineral residues or powder have been suggested as a cheaper source of amendments to increase soil alkalinity.However,slow mineral dissolution limits its efficient utilization.Soil microorganisms play a vital role in the weathering of rocks and their inoculation with mineral residues can enhance dissolution rates.Biochar is an alternative material for soil amendments,in particular,bone biochar(BBC)contains higher Ca and Mg that can induce even higher alkalinity.This review covers ⅰ)the contribution and mechanism of rock residues in alkalinity generation,ⅱ)the role of biochar or BBC to soil alkalinity,and ⅲ)the role of microbial inoculation for accelerating alkalinity generation through enhanced mineral dissolution.We conclude that using rock residues/BBC combined with microbial agents could mitigate soil acidification and SIC losses and also improve agricultural circularity.

Muhammad Azeem;Sajjad Raza;Gang Li;Pete Smith;Yong-Guan Zhu

Key Laboratory of Urban Environment and Health,Ningbo Observation and Research Station Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China;Zhejiang Key Lab of Urban Environmental Processes and Pollution Control,CAS Haixi Industrial Technology Innovation Center in Beilun,Ningbo 315830,China;Institute of Soil and Environmental Science,Pir Mehr Ali Shah Arid Agriculture University Rawalpindi,Punjab 46300,Pakistan;School of Geographical Sciences,Nanjing University of Information Science and Technology,Nanjing 21000,China;Institute of Biological&Environmental Sciences,University of Aberdeen,23 St Machar Drive,Aberdeen AB24 3UU,UK

土壤生态学快报（英文）

[1]Muhammad Azeem;Sajjad Raza;Gang Li;Pete Smith;Yong-Guan Zhu-.Soil inorganic carbon sequestration through alkalinity regeneration using biologically induced weathering of rock powder and biochar)[J].土壤生态学快报（英文）,2022(04):293-306

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