Biochar composition-dependent impacts on soil nutrient release, carbon mineralization, and potential environmental risk: A review

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:241

Review

El-Naggar, Ali^1,2,3  El-Naggar, Ahmed Hamdy^3,4  Shaheen, Sabry M.^5,6,7  Sarkar, Binoy^8,9  Chang, Scott X.¹⁰  Tsang, Daniel C. W.¹¹  Rinklebe, Joerg^6,12  Ok, Yong Sik^1,2 

[1] Korea Univ, Korea Biochar Res Ctr, OJERI, Seoul 02841, South Korea

[2] Korea Univ, Div Environm Sci & Ecol Engn, Seoul 02841, South Korea

[3] Ain Shams Univ, Fac Agr, Dept Soil Sci, Cairo 11241, Egypt

[4] ICBA, Dubai 14660, U Arab Emirates

[5] Univ Kafrelsheikh, Fac Agr, Dept Soil & Water Sci, Kafr Al Sheikh 33516, Egypt

[6] Univ Wuppertal, Lab Soil & Groundwater Management, Inst Fdn Engn Water & Waste Management, Sch Architecture & Civil Engn, D-42285 Wuppertal, Germany

[7] King Abdulaziz Univ, Fac Meteorol Environm & Arid Land Agr, Dept Arid Land Agr, Jeddah 21589, Saudi Arabia

[8] Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England

[9] Univ South Australia, Future Ind Inst, Mawson Lakes, SA 5095, Australia

[10] Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2H1, Canada

[11] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China

[12] Sejong Univ, Dept Environm Energy & Geoinformat, Seoul 05006, South Korea

关键词: Black carbon;    Carbon storage;    Policy development;    Priming effect;    Soil nutrients availability;   

DOI  :  10.1016/j.jenvman.2019.02.044

来源: Elsevier

【 摘 要 】

Biochar application has multiple benefits for soil fertility improvement and climate change mitigation. Biochar can act as a source of nutrients and sequester carbon (C) in the soil. The nutrient release capacity of biochar once applied to the soil varies with the composition of the biochar, which is a function of the feedstock type and pyrolysis condition used for biochar production. Biochar has a crucial influence on soil C mineralization, including its positive or negative priming of microorganisms involved in soil C cycling. However, in various cases, biochar application to the soil may cause negative effects in the soil and the wider environment. For instance, biochar may suppress soil nutrient availability and crop productivity due to the reduction in plant nutrient uptake or reduction in soil C mineralization. Biochar application may also negatively affect environmental quality and human health because of harmful compounds such as polycyclic aromatic hydrocarbons (PAHs), polychlorinated dibenzodioxins, and dibenzofurans (PCDD/DF). In this review, we discuss the linkage between biochar composition and function, evaluate the role biochar plays in soil fertility improvement and C sequestration, and discuss regulations and concerns regarding biochar's negative environmental impact. We also summarize advancements in biochar production technologies and discuss future challenges and priorities in biochar research.

【 授权许可】

Free