中国农业科学 ›› 2011, Vol. 44 ›› Issue (2): 316-324 .

• 土壤肥料·节水灌溉·农业生态环境 • 上一篇    下一篇

区域尺度农田N2O排放量估算研究进展

高春雨,王立刚,李虎,邱建军

  

  1. (中国农业科学院农业资源与农业区划研究所)
  • 收稿日期:2010-07-15 修回日期:2010-08-10 出版日期:2011-01-15 发布日期:2011-01-15
  • 通讯作者: 邱建军

Advances and Prospects of N2O Emission from Cropland at Regional Scale

GAO Chun-yu, WANG Li-gang, LI Hu, QIU Jian-jun
  

  1. (中国农业科学院农业资源与农业区划研究所)
  • Received:2010-07-15 Revised:2010-08-10 Online:2011-01-15 Published:2011-01-15
  • Contact: QIU Jian-jun

摘要:

N2O是重要的温室气体,农田是N2O的重要排放源。排放因子法、试验推断法、统计模型和过程模型是目前估算区域农田N2O排放的主要方法,应用上述方法,各国学者对全球、国家和其它区域尺度的农田N2O排放量进行了估算。结果表明,世界农田N2O排放总量在1.2—4.2 TgN之间,中国农田N2O排放总量在0.063—0.628 TgN之间。与其它方法相比,过程模型的精度更高,未来在区域农田N2O排放估算上会发挥越来越重要的作用。应用过程模型,开展模型功能开发与区域验证、氮沉降、淋溶、径流等间接排放因子研究以及区域减排技术集成与农田减排碳贸易测算是未来区域尺度农田N2O排放估算研究的重点。

关键词: 农田, N2O, 区域尺度, 方法

Abstract:

Nitric oxide is important greenhouse gases and the farmland is the main discharge source of nitric oxide. Emission factor method, experiment extrapolation method, statistic model method and process-oriented model method were main methods to estimate the emission of nitrous oxide from cropland. Applying the above-mentioned method, the scientists estimated the emission of nitric oxide in the world, country and other region. The result showed that the emission gross of nitrous oxide in the world was between 1.2 Tg N and 4.2 Tg N. It is between 0.063 and 0.628 Tg N in China. Compared to other methods, process-oriented model was more accurate and it would play far more important role in estimating the nitrous emission. They would become priority for future studies to develop the forecast function and verify the model, definite N2O emission factor of N deposition, leaching and runoff, integrate the greenhouse gas reduction technology and do research on carbon trade on farmland greenhouse gas reduction.

Key words: farmland, nitric oxide, regional scale, model