Biochar effect on the mineralization of soil organic matter
The objective of this work was to verify whether the addition of biochar to the soil affects the degradation of litter and of soil organic matter (SOM). In order to investigate the effect of biochar on the mineralization of barley straw, soil was incubated with 14C-labelled barley straw with or with...
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Embrapa Informação Tecnológica
2012-05-01
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Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500005&lng=en&tlng=en |
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doaj-5e134197e31b487b91511bb331bfb55c2020-11-24T22:38:24ZengEmbrapa Informação TecnológicaPesquisa Agropecuária Brasileira1678-39212012-05-0147566567110.1590/S0100-204X2012000500005S0100-204X2012000500005Biochar effect on the mineralization of soil organic matterSander Bruun0Tarek EL-Zehery1University of CopenhagenMansoura UniversityThe objective of this work was to verify whether the addition of biochar to the soil affects the degradation of litter and of soil organic matter (SOM). In order to investigate the effect of biochar on the mineralization of barley straw, soil was incubated with 14C-labelled barley straw with or without unlabelled biochar. To investigate the effect of straw on the mineralization of biochar, soil was incubated with 14C-labelled biochar with or without straw. In addition, to investigate the effect of biochar on old SOM, a soil labelled by applying labelled straw 40 years ago was incubated with different levels of biochar. All experiments had a control treatment, without any soil amendment. The effect of biochar on the straw mineralization was small and nonsignificant. Without biochar, 48±0.2% of the straw carbon was mineralized within the 451 days of the experiment. In comparison, 45±1.6% of C was mineralized after biochar addition of 1.5 g kg-1. In the SOM-labelled soil, the organic matter mineralized more slowly with the increasing doses of biochar. Biochar addition at 7.7 g kg-1 reduced SOM mineralization from 6.6 to 6.3%, during the experimental period. The addition of 15.5 g kg-1 of biochar reduced the mineralized SOM to 5.7%. There is no evidence of increased degradation of either litter or SOM due to biochar addition; consequently, there is no evidence of decreased stability of SOM.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500005&lng=en&tlng=enterra preta de índioestabilidade da matéria orgânicaefeito "priming"radiocarbono |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sander Bruun Tarek EL-Zehery |
spellingShingle |
Sander Bruun Tarek EL-Zehery Biochar effect on the mineralization of soil organic matter Pesquisa Agropecuária Brasileira terra preta de índio estabilidade da matéria orgânica efeito "priming" radiocarbono |
author_facet |
Sander Bruun Tarek EL-Zehery |
author_sort |
Sander Bruun |
title |
Biochar effect on the mineralization of soil organic matter |
title_short |
Biochar effect on the mineralization of soil organic matter |
title_full |
Biochar effect on the mineralization of soil organic matter |
title_fullStr |
Biochar effect on the mineralization of soil organic matter |
title_full_unstemmed |
Biochar effect on the mineralization of soil organic matter |
title_sort |
biochar effect on the mineralization of soil organic matter |
publisher |
Embrapa Informação Tecnológica |
series |
Pesquisa Agropecuária Brasileira |
issn |
1678-3921 |
publishDate |
2012-05-01 |
description |
The objective of this work was to verify whether the addition of biochar to the soil affects the degradation of litter and of soil organic matter (SOM). In order to investigate the effect of biochar on the mineralization of barley straw, soil was incubated with 14C-labelled barley straw with or without unlabelled biochar. To investigate the effect of straw on the mineralization of biochar, soil was incubated with 14C-labelled biochar with or without straw. In addition, to investigate the effect of biochar on old SOM, a soil labelled by applying labelled straw 40 years ago was incubated with different levels of biochar. All experiments had a control treatment, without any soil amendment. The effect of biochar on the straw mineralization was small and nonsignificant. Without biochar, 48±0.2% of the straw carbon was mineralized within the 451 days of the experiment. In comparison, 45±1.6% of C was mineralized after biochar addition of 1.5 g kg-1. In the SOM-labelled soil, the organic matter mineralized more slowly with the increasing doses of biochar. Biochar addition at 7.7 g kg-1 reduced SOM mineralization from 6.6 to 6.3%, during the experimental period. The addition of 15.5 g kg-1 of biochar reduced the mineralized SOM to 5.7%. There is no evidence of increased degradation of either litter or SOM due to biochar addition; consequently, there is no evidence of decreased stability of SOM. |
topic |
terra preta de índio estabilidade da matéria orgânica efeito "priming" radiocarbono |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500005&lng=en&tlng=en |
work_keys_str_mv |
AT sanderbruun biochareffectonthemineralizationofsoilorganicmatter AT tarekelzehery biochareffectonthemineralizationofsoilorganicmatter |
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1725713257047523328 |