Assessment of N_2O, NO_x and NH_3 emissions from a typical rural catchment in Eastern China(<Special Section>Recent Progress of Agro-Environmental studies in the East Asian region)
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概要
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To evaluate the atmospheric load of reactive gaseous nitrogen in the fast-developing Eastern China region, we compiled inventories of nitrous oxide (N_2O), nitrogen oxide (NO_x) and ammonia (NH_3) emissions from a typical rural catchment in Jiangsu province, China, situated at the lower reach of the Yangtze River. We considered emissions from synthetic N fertilizer, human and livestock excreta, decomposition of crop residue returned to cropland and residue burning, soil background and household energy consumption. The results showed that, for the 45.5km^2 catchment, the annual reactive gaseous emission was 279ton N, of which 7% was N_2O, 16% was NO_x and 77% was NH_3. Synthetic N fertilizer application was the dominant source of N_2O and NH_3 emissions and crop residue burning was the dominant source of NO_x emission. Sixty-seven percent of the total reactive gaseous N was emitted from croplands, but on a per unit area basis, NO_x and NH_3 emissions in residential areas were higher than in croplands, probably as a result of household crop residue burning and extensive human and livestock excreta management systems. Emission per capita was estimated to be 18.2kg N year^<-1> in the rural catchment, and emission per unit area was 56.9kg N ha^<-1> year^<-1> for NH_3+NO_x, which supports the observed high atmospheric N deposition in the catchment. Apparently, efficient use of N fertilizer and biological utilization of crop straw are important measures to reduce reactive gases emissions in this rural catchment.
- 社団法人日本土壌肥料学会の論文
著者
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Yan Xiaoyuan
Inst. Soil Sci. Chinese Acad. Sci. Nanjing Chn
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Yan Xiaoyuan
State Key Laboratory Of Soil And Sustainable Agriculture Institute Of Soil Science Chinese Academy O
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YANG Rong
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy
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TI Chaopu
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy
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LI Feiyue
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy
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DENG Meihua
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy
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Li Feiyue
State Key Laboratory Of Soil And Sustainable Agriculture Institute Of Soil Science Chinese Academy O
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Ti Chaopu
State Key Laboratory Of Soil And Sustainable Agriculture Institute Of Soil Science Chinese Academy O
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Yang Rong
State Key Laboratory Of Soil And Sustainable Agriculture Institute Of Soil Science Chinese Academy O
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Deng Meihua
State Key Laboratory Of Soil And Sustainable Agriculture Institute Of Soil Science Chinese Academy O
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Yan Xiaoyuan
State Key Laboratory Of Soil And Sustainable Agriculture Institute Of Soil Science Chinese Academy O
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YAN Xiaoyuan
State Key Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences
関連論文
- Airborne nitrogen load in Japanese and Chinese agroecosystems(Recent Progress of Agro-Environmental studies in the East Asian region)
- Assessment of N_2O, NO_x and NH_3 emissions from a typical rural catchment in Eastern China(Recent Progress of Agro-Environmental studies in the East Asian region)
- Denitrification characteristics of pond sediments in a Chinese agricultural watershed(Recent Progress of Agro-Environmental studies in the East Asian region)
- Estimations of emission factors for fertilizer-induced direct N_2O emissions from agricultural soils in Japan : Summary of available data(Environment)
- Number of soil profiles needed to give a reliable overall estimate of soil organic carbon storage using profile carbon density data(Environment)
- Comparison of statistical models for predicting cost effective nitrogen rate at rice-wheat cropping systems(Soil Fertility)
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