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首页> 美国政府科技报告 >CH Sub 4 Flux from Biogas Generators and Rice Paddies as Measured in Sichuan, China. (Annual Progress Report)
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CH Sub 4 Flux from Biogas Generators and Rice Paddies as Measured in Sichuan, China. (Annual Progress Report)

机译：来自中国四川的沼气发电机和稻田的CH sub 4通量。 （年度进展报告）

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We report methane release rates from several biogas generators and from rice paddies in Sichuan, China, during four different stages of growth, using chamber techniques. The release rates from biogas generators vary greatly from pit to pit, ranging between 0.037 and 50 g/day/pit, very much depending on the seal characteristics of the pits. If this result was representative for the whole year round and all the biogas pits in China, it would result in a total annual CH sub 4 release of 1 x 10 sup 8 to 1.5 x 10 sup 11 g for the 8 million biogas pits now used in China. CH sub 4 flux from rice paddies varies significantly from place to place and from time to time. The measured CH sub 4 fluxes are larger during the seedling stage and shortly before harvest, ranging from 3.1 to 2889 mg/m sup 2 /day. During the seedling stage transport through air bubbles may have a significant contribution to the total CH sub 4 emission, as air bubbles are commonly seen in the seedling beds and the measured CH sub 4 flux is much higher at a spot with air bubbles than at a spot without air bubbles. (ERA citation 12:005172)

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