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cje ›› 1999, Vol. ›› Issue (3): 6-9.

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Characteristics of N2O Emission from Rice Fields in the Hilly Area of Southern Jiangsu Province

Cao Jinliu1, Xu Hua2, ZhangHongkang3, Xing guangxi2, Ren Litong1, Yang Baoling1   

  1. 1. Jurong Agricultural School of Jiangsu Province, 212400;
    2. Institute of Soil Science, Academia Sinica, Nanjing 210008;
    3. Meteorological Bureau of Jurong City, Jiangsu Province, 212400
  • Received:1998-09-15 Revised:1998-11-08 Online:1999-06-10

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Abstract: The closed chamber method was used to observe the characteristics of N2O emission from rice fields in the hilly area of southern Jiangsu province. The results showed that the N2O emission fluxes varied between 22-31μg N2O-N·m-2 ·h-1 during rice-growing season. The N2O emission was enhanced by application of urea. 0.038%-0.195% of urea nitrogen added was lost to the atmosphere as nitrous oxide. There was no obvious correlation between fertilizer application rates and mean N2O fluxes. Under the condition of water management of drying and irrigation alternation, the precipitation significantly influenced N2O fluxes.

Key words: settlement morphology, commuting, urban transportation, energy consumption, greenhouse gases emission.