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| Content Provider | Directory of Open Access Journals (DOAJ) |
|---|---|
| Author | Li Cheng-Fang Zhou Dan-Na Kou Zhi-Kui Zhang Zhi-Sheng Wang Jin-Ping Cai Ming-Li Cao Cou-Gui |
| Abstract | Quantifying carbon (C) sequestration in paddy soils is necessary to help better understand the effect of agricultural practices on the C cycle. The objective of the present study was to assess the effects of tillage practices [conventional tillage (CT) and no-tillage (NT)] and the application of nitrogen (N) fertilizer (0 and 210 kg N ha(-1)) on fluxes of CH(4) and CO(2), and soil organic C (SOC) sequestration during the 2009 and 2010 rice growing seasons in central China. Application of N fertilizer significantly increased CH(4) emissions by 13%-66% and SOC by 21%-94% irrespective of soil sampling depths, but had no effect on CO(2) emissions in either year. Tillage significantly affected CH(4) and CO(2) emissions, where NT significantly decreased CH(4) emissions by 10%-36% but increased CO(2) emissions by 22%-40% in both years. The effects of tillage on the SOC varied with the depth of soil sampling. NT significantly increased the SOC by 7%-48% in the 0-5 cm layer compared with CT. However, there was no significant difference in the SOC between NT and CT across the entire 0-20 cm layer. Hence, our results suggest that the potential of SOC sequestration in NT paddy fields may be overestimated in central China if only surface soil samples are considered. |
| e-ISSN | 19326203 |
| DOI | 10.1371/journal.pone.0034642 |
| Journal | PLoS ONE |
| Issue Number | 5 |
| Volume Number | 7 |
| Language | English |
| Publisher | Public Library of Science (PLoS) |
| Publisher Date | 2012-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Medicine Science |
| Content Type | Text |
| Resource Type | Article |
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