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Updated: Jun 7, 2026

Assessment of Methane and Nitrous Oxide Fluxes from Paddy Field by Means of Static Closed Chambers Maintaining Plants Within Headspace
Published on: September 6, 2018
[Effects of elevated atmospheric CO2 on paddy soil nitrogen content during rice season]
Xiao-Zhi Wang1, Hai-Jin Zhang, Wei Sun
1College of Environment Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China. xzwang@yzu.edu.cn
Abstract:
Taking the China rice/wheat FACE (Free-Air Carbon Dioxide Enrichment) as a platform, this paper studied the effects of elevated CO2 on the NH4(+)-N and NO3(-)-N contents at different depths of paddy soil in rice season. Under elevated CO2, the NH4(+)-N content in plough layer increased at early growth stage but decreased at late growth stage, and the soil NO3(-)-N content at the depths 5, 15, 30, 60, and 90 cm increased by 46.5%, 36.8%, 23.3%, 103.7%, and 42.7%, respectively, with a significant increase occurred at the depths 60 cm (P < 0.01) and 90 cm (P < 0.05), compared with the control.
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