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Suitable biochar application practices simultaneously alleviate N2O and NH3 emissions from arable soils: A
Xiayan Zhang1, Lipeng Gu2, Dongyang Gui1
1Yunnan Provincial Field Scientific Observation and Research Station on Water-Soil-Crop System in Seasonal Arid Region, Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
Biochar application significantly reduces nitrous oxide (N2O) emissions but does not affect ammonia (NH3) volatilization. Biochar pH is key for simultaneously mitigating both reactive nitrogen (Nr) species in arable soils.
Area of Science:
- Agricultural Science
- Environmental Science
- Soil Science
Background:
- Nitrogen fertilization boosts crop yield but causes reactive nitrogen (Nr) loss, primarily as nitrous oxide (N2O) and ammonia (NH3) emissions.
- Biochar is a soil amendment with potential for reducing Nr emissions, but its combined effect on N2O and NH3 is not fully understood.
- Factors influencing biochar's efficacy, including its characteristics and soil conditions, require further investigation.
Conclusions:
- Biochar application offers a strategy for reducing N2O emissions in agriculture.
- Biochar's effectiveness in mitigating both N2O and NH3 is highly dependent on its properties, particularly pH.
- Optimizing biochar application can enhance agricultural productivity while minimizing environmental costs associated with reactive nitrogen loss.
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