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Open AccessFeature PaperArticle

The Effects of pH Change through Liming on Soil N2O Emissions

1
College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
2
Department of Soil Science, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan 60800, Punjab, Pakistan
3
Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
4
College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, Campus University, University Santiago de Compostela, 27002 Lugo, Spain
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CNRS, EPHE, Sorbonne Universités, UPMC University Paris 06, UMR 7619 METIS, 4 Place Jussieu, CEDEX 05, 75252 Paris, France
7
Geosciences Division, IFP Energies Nouvelles, 1 et 4 Avenue de Bois-Préau, CEDEX 92852 Rueil-Malmaison, France
*
Authors to whom correspondence should be addressed.
Processes 2020, 8(6), 702; https://doi.org/10.3390/pr8060702
Received: 19 April 2020 / Revised: 12 June 2020 / Accepted: 15 June 2020 / Published: 17 June 2020
(This article belongs to the Special Issue Gas, Water and Solid Waste Treatment Technology)
Nitrous oxide (N2O) is an overwhelming greenhouse gas and agricultural soils, particularly acidic soils, are the main source of its release to the atmosphere. To ameliorate acidic soil condition, liming materials are added as an amendment. However, the impact of liming materials has not been well addressed in terms of exploring the effect of soil pH change on N2O emissions. In the present study, a soil with pH 5.35 was amended with liming materials (CaMg(CO3)2, CaCO3, Ca(OH)2 and CaO) to investigate their effects on N2O emissions. The results indicate that application of liming materials reduced the magnitudes of N2O emissions. The maximum reduction of soil N2O emissions took place for Ca(OH)2 treatment when compared to the other liming materials, and was related to increasing soil pH. Mineral N, dissolved organic C, and microbial biomass C were also influenced by liming materials, but the trend was inconsistent to the soil pH change. The results suggest that N2O emission mitigation is more dependent on soil pH than C and N dynamics when comparing the different liming materials. Moreover, ameliorating soil acidity is a promising option to mitigate N2O emissions from acidic soils. View Full-Text
Keywords: lime; mineral nitrogen; soil pH; organic carbon; microbial biomass; N2O lime; mineral nitrogen; soil pH; organic carbon; microbial biomass; N2O
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MDPI and ACS Style

Shaaban, M.; Wu, Y.; Wu, L.; Hu, R.; Younas, A.; Nunez-Delgado, A.; Xu, P.; Sun, Z.; Lin, S.; Xu, X.; Jiang, Y. The Effects of pH Change through Liming on Soil N2O Emissions. Processes 2020, 8, 702.

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