数字农科院2.0

The Effects Of Ph Change Through Liming On Soil N2O Emissions

文献类型： 外文期刊

作者： Shaaban, M; Wu, YP; Wu, L; Hu, RG; Younas, A; Nunez-Delgado, A; Xu, P; Sun, Z; Lin, S; Xu, XY; Jiang, YB

作者机构：

关键词： Lime; Mineral Nitrogen; Soil Ph; Organic Carbon; Microbial Biomass; N2O

期刊名称： PROCESSES

ISSN：

年卷期： 2020 年 8 卷 6 期

页码：

收录情况： JCR（2021版）

摘要： 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.

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