| Effects of oat tillage systems on greenhouse gas emissions in dry land |
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| DOI：10.7606/j.issn.1000-7601.2011.03.21 |
| Key Words: oat tillage system greenhouse gas emission dryland farming famming pastoral zone |
| Author Name | Affiliation | | ZHANG Zhidong | Inner Mongolia Agricultural Uniwersity，Hohhot, Inner Mongolia 010018, China | | LIU Jinghui | Inner Mongolia Agricultural Uniwersity，Hohhot, Inner Mongolia 010018, China | | YU Qing | East Cereal and Oilseed Research Centre，Agriculture and Agri Food Canada, Ottawva K1A 0C6，Canada | | WANG Runlian | Inner Mongolia Agricultural Uniwersity，Hohhot, Inner Mongolia 010018, China | | WANG Yongqiang | Inner Mongolia Agricultural Uniwersity，Hohhot, Inner Mongolia 010018, China | | CUI Fengjuan | Inner Mongolia Agricultural Uniwersity，Hohhot, Inner Mongolia 010018, China |
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| Abstract: |
| Greenhouse gas emissions (CO2, CH4 and N2O) under 5 treatments, including conventional tillage, no-tillage with low stubble and low mulch，no tllage with high stubble and low mulch, no tillage with low stubble and high mulch，and no tlagle with high stubble and high mulch, were detemined using static gas cases on oat production field before seed sowing， during growth，and after harvest. The results showed:CO2 emission fluxes followed a single peak curve，and the peak appeared at the seedling stage. CH4 fluxes were mostly negative, indicating there was a net absorp-tion. Unobvious trend was observed for N2O emission. Of all the 5 treatments, CH4 and CO2 fluxes were descended in an order of conventional tillage， no-tillage with low stubble and low mulch，no tllge with high stubble and low mulch，no-tillgle with low stubble and high mulch，and no tllage with high stubble and high mulch. N2O and CO2 presented an op-posite trend in emission. The integrated emission effects of greenhouse gases were similar to CO2. Coverage with stubbles under no tillage reduced CO2 emission and CH4 absorption, increased N2O emissions，and greenhouse gas emissions were also increased. But more studies are still warranted to investigate the long tem effects of the different treatments on greenhouse gas emissions. |
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