Abstract:

Paddy soil is one of the most important carbon storages, which is affected by agricultural management practices. The achievements obtained in past researches were reviewed and the effects of agricultural management practices on carbon emissions, including the stocking of duck in paddy field, irrigation, N fertilization and tillage, were discussed. The results indicated that raising ducks in paddy field significantly decreased greenhouse effects, intermittent irrigation reduced CH4 emissions, N fertilization did not affect carbon emissions, and no-tillage had a significant decrease in carbon emissions. However, due to the complexity of soil carbon emission process, the heterogeneity of paddy environment and the human activity, it is inaccurate to assess the effects of agricultural management practices on carbon emissions, and thus it is necessary to further discuss the spatio-temporal changes in carbon emissions under different agricultural management practices for accurate assessment of the effects of carbon emissions on global warming.

Key words: paddy fields, carbon emission, CH4, CO2, agricultural management practices