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Biochar stimulates the decomposition of simple organic matter and suppresses the decomposition of complex organic matter in a sandy loam soil
HONGGUANG CHENG;  PAUL W. HILL;  MOHD SAUFI BASTAMI;  DAVEY L. JONES
2017
发表期刊Global Change Biology Bioenergy
卷号9期号:6页码:1110-1121
摘要

Incorporating crop residues and biochar has received increasing attention as tools to mitigate atmospheric carbon dioxide (CO2) emissions and promote soil carbon (C) sequestration. However, direct comparisons between biochar, torrefied biomass, and straw on both labile and recalcitrant soil organic matter (SOM) remain poorly understood. In this study, we explored the impact of biochars produced at different temperatures and torrefied biomass on the simple C substrates (glucose, amino acids), plant residues (Lolium perenne L.), and native SOM breakdown in soil using a 14 degrees C labeling approach. Torrefied biomass and biochars produced from wheat straw at four contrasting pyrolysis temperatures (250, 350, 450, and 550 degrees C) were incorporated into a sandy loam soil and their impact on C turnover compared to an unamended soil or one amended with unprocessed straw. Biochar, torrefied biomass, and straw application induced a shift in the soil microbial community size, activity, and structure with the greatest effects in the straw-amended soil. In addition, they also resulted in changes in microbial carbon use efficiency (CUE) leading to more substrate C being partitioned into catabolic processes. While overall the biochar, torrefied biomass, and straw addition increased soil respiration, it reduced the turnover rate of the simple C substrates, plant residues, and native SOM and had no appreciable effect on the turnover rate of the microbial biomass. The negative SOM priming was positively correlated with biochar production temperature. We therefore ascribe the increase in soil CO2 efflux to biochar-derived C rather than that originating from SOM. In conclusion, the SOM priming magnitude is strongly influenced by both the soil organic C quality and the biochar properties. In comparison with straw, biochar has the greatest potential to promote soil C storage. However, straw and torrefied biomass may have other cobenefits which may make them more suitable as a CO2 abatement strategy.

关键词Black Carbon Carbon Cycling Charcoal Dissolved Organic Carbon Priming Effect Soil Management
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/7753
专题环境地球化学国家重点实验室
作者单位1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550002, China
2.School of Environment, Natural Resources & Geography, Bangor University, Bangor, Gwynedd, LL57 2UW, UK
第一作者单位中国科学院地球化学研究所
通讯作者单位中国科学院地球化学研究所
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HONGGUANG CHENG;PAUL W. HILL;MOHD SAUFI BASTAMI;DAVEY L. JONES. Biochar stimulates the decomposition of simple organic matter and suppresses the decomposition of complex organic matter in a sandy loam soil[J]. Global Change Biology Bioenergy,2017,9(6):1110-1121.
APA HONGGUANG CHENG;PAUL W. HILL;MOHD SAUFI BASTAMI;DAVEY L. JONES.(2017).Biochar stimulates the decomposition of simple organic matter and suppresses the decomposition of complex organic matter in a sandy loam soil.Global Change Biology Bioenergy,9(6),1110-1121.
MLA HONGGUANG CHENG;PAUL W. HILL;MOHD SAUFI BASTAMI;DAVEY L. JONES."Biochar stimulates the decomposition of simple organic matter and suppresses the decomposition of complex organic matter in a sandy loam soil".Global Change Biology Bioenergy 9.6(2017):1110-1121.
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