Contribution of soil inorganic carbon to atmospheric CO2: More important than previously thought
Contribution of soil inorganic carbon to atmospheric CO2: More important than previously thought
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DOI：
10.1111/gcb.14463
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发表时间：
2018-11
影响因子：
11.6
通讯作者：
Kazem Zamanian;Y. Kuzyakov
中科院分区：
文献类型：
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作者：
Kazem Zamanian;Y. Kuzyakov
通过中和氮肥施用诱导的酸度从土壤无机碳（SIC）产生二氧化碳在全球范围内都具有相关性。在此我们分析了可能影响施氮肥后从SIC产生二氧化碳的因素：（1）土壤有机质和黏土的缓冲能力，（2）氮肥促进作物生长以及地下碳输入的增加，（3）施肥点的酸度局部化，（4）SIC在底土中的局部化，（5）使用氧化钙和碱性炉渣替代石灰，（6）低收入国家的农民无力施用石灰。我们得出结论，我们之前对氮肥施用导致的碳酸盐二氧化碳通量（7.5×10¹²克碳/年）以及酸性土壤施用石灰导致的二氧化碳通量（273×10¹²克碳/年）的估计可能是低估的，因此，SIC对大气二氧化碳的贡献比之前认为的更为重要。本文受版权保护。保留所有权利。
CO2 production from soil inorganic carbon (SIC) by neutralization of nitrogen (N) fertilization-induced acidity is globally relevant. Here we analyzed factors that may affect CO2 production from SIC after N fertilization: (1) buffering capacity of soil organic matter and of clays, (2) increasing crop growth and C input belowground by N fertilization, (3) acidity localization at the fertilization point, (4) SIC localization in the sub-soil, (5) application of CaO and basic slag instead of lime, (6) inability of farmers in low income countries to apply lime. We conclude that our previous estimation of CO2 fluxes from carbonates by N fertilization (7.5×1012 g C y-1 ) and from liming of acidic soils (273×1012 g C y-1 ) is possibly an underestimation and consequently, the contribution of SIC to atmospheric CO2 is more important than previously thought. This article is protected by copyright. All rights reserved.