The influence of above-ground residue input and incorporation on GHG fluxes and stable SOM formation in a sandy soil
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- 作者：Elaine Mitchella ; e2.mitchell@qut.edu.au" class="auth_mail" title="E-mail the corresponding author ; Clemens Scheera ; David W. Rowlingsa ; Richard T. Conanta ; b ; M. Francesca Cotrufob ; Lona van Deldena ; Peter R. Gracea
- 关键词：Decomposition ; Isotopes ; Stable SOM ; GHG fluxes ; Agricultural residue management
- 刊名：Soil Biology & Biochemistry
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：101
- 期：Complete
- 页码：104-113
- 全文大小：1252 K
文摘
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Mixing of residues with top soil resulted in a 3 fold increase in residue-derived CO2 and N2O losses.
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Increasing the rate of residue input led to greater priming of existing SOC and elevated N2O losses.
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There was a decline in the stabilisation efficiency of C inputs at higher input levels.
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There was an increase in residue-derived C recovery with mixing with majority (57%) in active C pool.
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High rates of residue input and mixing resulted in GHG fluxes outweighing SOC gains over 12 months.