与不同土壤特性和水分下不同尿素相比,消化剂会诱导显著更高的N2O排放
Haoruo Li1, Xiaotong Song2, Di Wu3
1Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China; College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China.
Environmental research
|November 15, 2023
概括
消化剂的应用比尿素更多地增加了氧化 (N2O) 的排放量,特别是在潮湿的性土壤中. 化抑制剂有效减少这些排放,特别是在潮湿的条件下.
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:
- 消化剂是一种肥料替代品,具有潜在的环境效益.
- 然而,由于氨和碳含量,消化剂的应用可能会增加氧化 (N2O) 排放.
- 了解N2O排放对消化和尿素的反应对于可持续农业至关重要.
研究的目的:
- 为了比较来自消化剂和尿素应用的N2O排放.
- 调查土壤特性和水分对这些排放的影响.
- 评估化抑制剂在减轻消化物中N2O的有效性.
主要方法:
- 微宇宙化使用三种土壤类型 (流水,黑色,拉托索尔).
- 消化剂或尿素 (100 mg N kg-1) 与/或没有3,4-二甲基pyrazole酸盐 (DMPP) 的应用.
- 不同的土壤水分水平 (45%,65%,85% WFPS).
主要成果:
- N2O排放量随着土壤水分的增加而呈指数级增加,对于消化物和尿素.
- 消化剂诱导的N2O和CO2排放量明显高于尿素,但在流水土壤中85%的WFPS除外.
- DMPP减少了N2O排放量73%-99%,特别是在湿,消化肥土壤中.
结论:
- 与尿素相比,消化剂的应用具有较高的N2O排放风险,受土壤类型和水分的影响.
- 土壤湿度显著加剧了来自消化物的N2O排放.
- 化抑制剂有效地减轻消化剂诱导的N2O排放,提供减少环境影响的战略.
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