Phosphate Addition Increases N2O Emissions Under Nitrogen Deposition in Qinghai-Tibet Plateau Wet Meadows
Author Information
Author(s): Wu Jiangqi, Wang Haiyan, Li Guang
Primary Institution: Gansu Agricultural University
Hypothesis
Phosphate addition increases N2O emissions due to stimulating the activity of denitrifying microorganisms.
Conclusion
Phosphate addition did not significantly affect N2O flux, but nitrogen addition significantly increased N2O emissions, especially when combined with phosphate.
Supporting Evidence
- N addition significantly increased N2O emissions by 3.45 μg⋅m–2⋅h–1.
- Phosphate addition intensified the effect of nitrogen deposition on N2O flux.
- N2O emissions varied significantly across different treatments and seasons.
- Total nitrogen and nitrate nitrogen were the main controls on soil N2O emissions.
Takeaway
Adding nitrogen to wet meadows makes them release more greenhouse gas, but adding phosphate alone doesn't help much.
Methodology
The study used natural wet meadow as a control and conducted experiments with nitrogen and phosphorus additions to measure their effects on N2O emissions over two years.
Limitations
The study focused only on specific treatments and may not represent all conditions in the Qinghai-Tibet Plateau.
Statistical Information
P-Value
0.03
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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