Influence of crop rotation and liming on greenhouse gas emissions from a semi-arid soil
Semi-arid lands represent one fifth of the global land area but our understanding of greenhouse gas fluxes from these regions is poor. We investigated if inclusion of a grain legume and/or lime in a crop rotation altered greenhouse gas emissions from an acidic soil. Nitrous oxide (N2O) and methane (...
| Main Authors: | , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Elsevier
2013
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| Online Access: | https://hdl.handle.net/10568/34484 |
| _version_ | 1855534878536237056 |
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| author | Barton, L. Murphy, D.V. Butterbach-Bahl, Klaus |
| author_browse | Barton, L. Butterbach-Bahl, Klaus Murphy, D.V. |
| author_facet | Barton, L. Murphy, D.V. Butterbach-Bahl, Klaus |
| author_sort | Barton, L. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Semi-arid lands represent one fifth of the global land area but our understanding of greenhouse gas fluxes from these regions is poor. We investigated if inclusion of a grain legume and/or lime in a crop rotation altered greenhouse gas emissions from an acidic soil. Nitrous oxide (N2O) and methane (CH4) fluxes were measured from a rain-fed, cropped soil in a semi-arid region of Australia for two years on a subdaily basis. The randomised-block design included two cropping rotations (lupin–wheat, wheat–wheat) by two liming treatments (0, 3.5 t ha−1) by three replicates. The lupin–wheat rotation only received N fertilizer during the wheat phase (20 kg N ha−1), while the wheat–wheat received 125 kg N ha−1 during the two year study. Fluxes were measured using soil chambers connected to a fully automated system
that measured N2O and CH4 by gas chromatography. Nitrous oxide fluxes were low (−1.4 to 9.2 g N2ON
ha−1 day−1), and less than those reported for arable soils in temperate climates. Including a grain legume
in the cropping rotation did not enhance soil N2O; total N2O losses were approximately 0.1 kg N2O-N ha−1 after two years for both lupin–wheat and wheat–wheat rotations when averaged across liming treatment.
Liming decreased cumulative N2O emissions from the wheat–wheat rotation by 30% by lowering the contribution of N2O emissions following summer–autumn rainfall events, but had no effect on N2O emissions from the lupin–wheat rotation. Daily CH4 fluxes ranged from −14 to 5 g CH4-C ha−1 day−1.
Methane uptake after two years was lower from the wheat–wheat rotation (601 g CH4-C ha−1) than from either lupin–wheat rotations (967 g CH4-C ha−1), however liming the wheat–wheat rotation increased CH4 uptake (1078 g CH4-C ha−1) to a value similar to the lupin–wheat rotation. Liming provides a strategy for lowering on-farm greenhouse gas emissions from N fertilised soils in semi-arid environments via decreased N2O fluxes and increased CH4 uptake. |
| format | Journal Article |
| id | CGSpace34484 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace344842024-08-27T10:36:47Z Influence of crop rotation and liming on greenhouse gas emissions from a semi-arid soil Barton, L. Murphy, D.V. Butterbach-Bahl, Klaus agriculture soil crops Semi-arid lands represent one fifth of the global land area but our understanding of greenhouse gas fluxes from these regions is poor. We investigated if inclusion of a grain legume and/or lime in a crop rotation altered greenhouse gas emissions from an acidic soil. Nitrous oxide (N2O) and methane (CH4) fluxes were measured from a rain-fed, cropped soil in a semi-arid region of Australia for two years on a subdaily basis. The randomised-block design included two cropping rotations (lupin–wheat, wheat–wheat) by two liming treatments (0, 3.5 t ha−1) by three replicates. The lupin–wheat rotation only received N fertilizer during the wheat phase (20 kg N ha−1), while the wheat–wheat received 125 kg N ha−1 during the two year study. Fluxes were measured using soil chambers connected to a fully automated system that measured N2O and CH4 by gas chromatography. Nitrous oxide fluxes were low (−1.4 to 9.2 g N2ON ha−1 day−1), and less than those reported for arable soils in temperate climates. Including a grain legume in the cropping rotation did not enhance soil N2O; total N2O losses were approximately 0.1 kg N2O-N ha−1 after two years for both lupin–wheat and wheat–wheat rotations when averaged across liming treatment. Liming decreased cumulative N2O emissions from the wheat–wheat rotation by 30% by lowering the contribution of N2O emissions following summer–autumn rainfall events, but had no effect on N2O emissions from the lupin–wheat rotation. Daily CH4 fluxes ranged from −14 to 5 g CH4-C ha−1 day−1. Methane uptake after two years was lower from the wheat–wheat rotation (601 g CH4-C ha−1) than from either lupin–wheat rotations (967 g CH4-C ha−1), however liming the wheat–wheat rotation increased CH4 uptake (1078 g CH4-C ha−1) to a value similar to the lupin–wheat rotation. Liming provides a strategy for lowering on-farm greenhouse gas emissions from N fertilised soils in semi-arid environments via decreased N2O fluxes and increased CH4 uptake. 2013-03 2014-02-02T10:15:49Z 2014-02-02T10:15:49Z Journal Article https://hdl.handle.net/10568/34484 en Limited Access Elsevier Barton, L., Murphy, D.V. and Butterbach-Bahl, K. 2013. Influence of crop rotation and liming on greenhouse gas emissions from a semi-arid soil. Agriculture, Ecosystems and Environment 167: 23 - 32 |
| spellingShingle | agriculture soil crops Barton, L. Murphy, D.V. Butterbach-Bahl, Klaus Influence of crop rotation and liming on greenhouse gas emissions from a semi-arid soil |
| title | Influence of crop rotation and liming on greenhouse gas emissions from a semi-arid soil |
| title_full | Influence of crop rotation and liming on greenhouse gas emissions from a semi-arid soil |
| title_fullStr | Influence of crop rotation and liming on greenhouse gas emissions from a semi-arid soil |
| title_full_unstemmed | Influence of crop rotation and liming on greenhouse gas emissions from a semi-arid soil |
| title_short | Influence of crop rotation and liming on greenhouse gas emissions from a semi-arid soil |
| title_sort | influence of crop rotation and liming on greenhouse gas emissions from a semi arid soil |
| topic | agriculture soil crops |
| url | https://hdl.handle.net/10568/34484 |
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