土壤修改减少了CH4和CO2,但增加了N2O和NH3的排放在盐米田
Hu Cui1, Hui Zhu1, Fu-Man Zhang1
1State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.
(NH3) 挥发和温室气体 (GHG) 排放被研究在和的田里. 修改减少了甲 (CH4) 和二氧化碳 (CO2),但增加了NH3和氧化 (N2O) 的排放.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 和的田面临着营养损失和温室气体 (GHG) 排放的挑战.
- 关于这些环境中的氨 (NH3) 挥发和温室气体动态的研究有限,特别是关于基因相互作用的研究.
研究的目的:
- 调查脱硫石膏 (DG) 和有机肥料 (OF) 对盐酸田NH3挥发和温室气体排放的影响.
- 了解涉及细菌群落和特定功能基因 (16sRNA,amoA,narG,nirK,nosZ,nifH) 的潜在机制.
主要方法:
- 一个中宇宙规模的实验是使用盐酸性大米土进行的.
- 处理包括控制 (CK),脱硫石膏 (DG) 和有机肥料 (OF).
- 测量重点是NH3挥发,温室气体排放 (CH4,CO2,N2O),土壤/水中的营养含量以及关键微生物基因的丰富度.
主要成果:
- 与CK相比,DG和OF处理显著减少了CH4和CO2排放.
- 相反,DG和OF处理都增加了NH3挥发和N2O排放.
- NH3挥发与土壤/水氨 (NH4+-N) 有关,而N2O来自酸盐 (NO3--N) 和水NH4+-N.
- 增加的NH3和N2O排放被归因于细菌竞争减少,而不是增加细菌活动或基因拷贝.
结论:
- DG和OF的修正案改变了性性田的气体排放,减少了CH4和CO2,但增加了NH3和N2O.
- 了解NH3和N2O的来源对于有效管理至关重要.
- 该研究强调了考虑细菌社区动态在减轻营养损失和气体排放方面的重要性.
更多相关视频
07:32Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.
Published on: June 4, 2021
10:29Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers
Published on: March 21, 2016
相关概念视频
Responses to Salt Stress
Responses to Drought and Flooding
The Soil Ecosystem
Adaptations that Reduce Water Loss
Bioremediation
Overview of Nitrogen Metabolism
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
