|Title:||稻藁掩埋處理對水田溫室氣體排放影響之研究||Other Titles:||Effects of Rice Straw Incorporation to Greenhouse Gases Emission from Paddy Fields||Authors:||陳守泓
|Keywords:||全球暖化;溫室氣體;稻藁掩埋;Global warming;Greenhouse gases;Rice straw incorporation||Issue Date:||Dec-2011||Publisher:||中華土壤肥料學會||Journal Volume:||14||Journal Issue:||1-2||Start page/Pages:||15-30||Source:||土壤與環境||Abstract:||
Simulation studies were conducted, using a computer model which considered the dynamic changes C and N in paddy ecosystems, to evaluate the potential of decreasing national greenhouse gases (GHG) emissions by incorporating shredded rice straws into soils after harvest. Results indicated that the net GHG emission from paddy fields could be decreased in the beginning, as results of the rapid increasing of soil organic carbon (SOC) content through the rice straws incorporation. However, the atmospheric C02 sequestering capability would be gradually reduced while the SOC contents were reaching equilibrium, but the amounts of CH4 emitted during flooding periods were increased due to the increasing of SOC content. Considering the higher global warming potential of CH4, the net amount of GHG emitted due to rice straw incorporation would exceed those not incorporating the rice straws after practicing the measures for more than 10 years in medium to coarse textured soils (20 years for fine textured soils). Therefore, rice straw incorporation can not be considered as a no-regret measure to decrease the amount of GHG emission from paddy fields.
|Appears in Collections:||農業工程組|
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