玉米地土壤反硝化速率与N<sub>2</sub>O排放通量的动态变化

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名

邮箱

手机号码

标题

留言内容

验证码

玉米地土壤反硝化速率与N₂O排放通量的动态变化

基金项目: 澳大利亚ACIAR资助项目(LWR/96/164)、国家重大基础研究(973)规划项目(G1999011803)、“九五”中国科学院特别支持项目(KZ95T-04-01)和中国科学院重大项目(K951-A1-301)共同资助

1.
Shijiazhuang Institute of Agricultural Modernization,Chinese Academy of Sciences,Shijiazhuang 050021
2.
Institute of Land and Food Resources,Melbourne University,Parkville 3052

摘要: 应用乙炔抑制原状土柱培育法测定了4种施肥处理的玉米地N素反硝化损失速率和氧化亚氮(N₂O)排放通量，并分析了它们与土壤湿度、土壤温度以及硝态氮(NO^-₃-N)含量之间的关系，计算了因反硝化和N₂O排放造成的N肥损失率。结果表明，玉米生育期内土壤N素的反硝化损失量为0.67～3.85kg/hm²，N肥的反硝化损失率为0.5%～1.5%；土壤N2O排放总量为0.55～1.42kg/hm²，N肥的N₂O排放系数为0.2%～0.5%。
- 土壤N素 /
- 反硝化速率 /
- N₂O排放通量
Abstract: Denitrification rates and N₂O fluxes are measured by using the acetylene inhibition method on intact soil cores in different N－fertilized maize plots.The relationships among denitrification rate and N₂O flux with soil moisture,soil temperature and NO^-₃-N concentration in soil are analyzed,and losses of N－fertilizer caused by denitrification and N₂O emission are calculated.The results show that denitrification loss from soil is 0.67～3.85kg/hm² during the growing period of maize,percentage of denitrification loss from N－fertilizer is 0.5%～1.5%,the total N₂O emission is 0.55～1.42kg/hm²,and N₂O emission coefficient of N－fertilizer is 0.2%～0.5%.
- Soil nitrogen /
- Denitrification rate /
- N₂O flux