A method for screening the relative long-term stability of biochar

被引：204

作者：

Cross, Andrew ^{[1
]}

Sohi, Saran P. ^{[1
]}

机构：

[1] Univ Edinburgh, Sch Geosci, UK Biochar Res Ctr UKBRC, Edinburgh EH9 3JN, Midlothian, Scotland

来源：

GLOBAL CHANGE BIOLOGY BIOENERGY | 2013年 / 5卷 / 02期

关键词：

accelerated ageing; Biochar; carbon sequestration; long-term stability; oxidative treatment; pyrolysisbiochar systems; BLACK CARBON DECOMPOSITION; ORGANIC-MATTER; SOIL; OXIDATION; DEGRADATION; TEMPERATURE; EMISSIONS; SYSTEMS; COAL; N2O;

D O I：

10.1111/gcbb.12035

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Biochar is being actively explored as a tool for long-term soil carbon sequestration. However, in order for this to be effective the long-term environmental stability of biochar must be assured. Here, we define and test an accelerated ageing method that seeks to reflect the oxidative nature of biochar degradation in soil. The method was applied to a systematic set of biochar samples produced from sugarcane bagasse, and a set of biochar samples produced from four different biomass sources. The stability of carbon in these samples was found to range between 41.6% and 76.1%, loosely correlating with biochar O:C ratio (r=0.73). Increasing intensity of oxidative treatment eliminated more carbon. It also increased surface O:C ratio in a manner reported for naturally aged charcoal samples. The method effectively discriminated biochar produced under contrasting pyrolysis conditions and could be used as a proxy for environmental ageing of approximately 100years under temperate conditions.

引用

页码：215 / 220

页数：6

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