Effect of Additional Carbonates on CO2 Emission from Calcareous Soil During the Closed-Jar Incubation

DONG Yan-Jie; CAI Miao; LIANG Bin; ZHOU Jian-Bin

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Effect of Additional Carbonates on CO2 Emission from Calcareous Soil During the Closed-Jar Incubation

机译：封闭式孵化过程中额外碳酸盐对石灰性土壤CO2排放的影响

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The closed-jar incubation method is widely used to estimate the mineralization of soil organic C.There are two C pools (i.e.,organic and inorganic C) in calcareous soil.To evaluate the effect of additional carbonates on CO2 emission from calcareous soil during closed-jar incubation,three incubation experiments were conducted by adding different types (CaCO3 and MgCO3) and amounts of carbonate to the soil.The addition of carbonates significantly increased CO2 emission from the soil; the increase ranged from 12.0％ in the CaCO3 amended soil to 460％ in the MgCO3 amended soil during a 100-d incubation.Cumulative CO2 production at the end of the incubation was three times greater in the MgCO3 amended soil compared to the CaCO3 amended one.The CO2 emission increased with the amount of CaCO3 added to the soil.In contrast,CO2 emission decreased as the amount of MgCO3 added to the soil increased.Our results confirmed that the closed-jar incubation method could lead to an overestimate of organic C mineralization in calcareous soils.Because of its effect on soil pH and the dissolution of carbonates,HgC12 should not be used to sterilize calcareous soil if the experiment includes the measurement of soil CO2 production.

机译：密闭罐式培养法被广泛用于估算土壤有机碳的矿化作用。石灰性土壤中有两个碳库（有机碳和无机碳）。评估封闭期间其他碳酸盐对石灰性土壤二氧化碳排放的影响。罐式培养，通过向土壤中添加不同类型（CaCO3和MgCO3）和碳酸盐的量进行三个培养实验。碳酸盐的添加显着增加了土壤中CO2的排放;在100天的孵化过程中，CaCO3改良土壤的增加量为12.0％，而MgCO3改良土壤的增加量为460％。孵育结束时，MgCO3改良土壤的累积CO2产量是CaCO3改良土壤的三倍。随着土壤中CaCO3含量的增加，CO2的排放量增加;相反，随着土壤中MgCO3的增加，CO2的排放量减少。我们的结果证实了封闭罐式培养方法可能导致对有机碳的高估HgC12由于会影响土壤pH值和碳酸盐的溶解，因此，如果该实验包括测量土壤CO2的产生，则不应将其用于石灰性土壤的灭菌。

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来源
《土壤圈（英文版）》 |2013年第2期|137-142|共6页
作者
DONG Yan-Jie; CAI Miao; LIANG Bin; ZHOU Jian-Bin;
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作者单位

College of Natural Resources and Environment, Northwest A&F University, Yangling 712100,China;

Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling 712100,China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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正文语种 eng
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Effect of Additional Carbonates on CO2 Emission from Calcareous Soil During the Closed-Jar Incubation

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