Can Biochar Protect Labile Organic Matter Against Mineralization in Soil?

Giovanna B.MELAS; Oriol ORTIZ; Josep M.ALACA(N)IZ

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Can Biochar Protect Labile Organic Matter Against Mineralization in Soil?

机译：生物炭能否保护不稳定的有机物质免受土壤中矿化的影响？

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Biochar could help to stabilize soil organic (SOM) matter,thus sequestering carbon (C) into the soil.The aim of this work was to determine an easy method i) to estimate the effects of the addition of biochar and nutrients on the organic matter (SOM)mineralization in an artificial soil,proposed by the Organization for Economic Co-operation and Development (OECD),amended with glucose and ii) to measure the amount of labile organic matter (glucose) that can be sorbed and thus be partially protected in the same soil,amended or not amended with biochar.A factorial experiment was designed to check the effects of three single factors (biochar,nutrients,and glucose) and their interactions on whole SOM mineralization.Soil samples were inoculated with a microbial inoculum and preincubated to ensure that their biological activities were not limited by a small amount of microbial biomass,and then they were incubated in the dark at 21 ℃ for 619 d.Periodical measurements of C mineralized to carbon dioxide (CO2) were carried out throughout the 619-d incubation to allow the mineralization of both active and slow organic matter pools.The amount of sorbed glucose was calculated as the difference between the total and remaining amounts of glucose added in a soil extract.Two different models,the Freundlich and Langmuir models,were selected to assess the equilibrium isotherms of glucose sorption.The CO2-C release strongly depended on the presence of nutrients only when no biochar was added to the soil.The mineralization of organic matter in the soil amended with both biochar and glucose was equal to the sum of the mineralization of the two C sources separately.Furthermore,a significant amount of glucose can be sorbed on the biochar-amended soil,suggesting the involvement of physico-chemical mechanisms in labile organic matter protection.

机译：生物炭可以帮助稳定土壤有机物（SOM），从而将碳（C）螯合到土壤中。这项工作的目的是确定一种简便的方法i）估算添加生物炭和养分对有机物的影响经经济合作与发展组织（OECD）提议，在人造土壤中进行（SOM）矿化，并经葡萄糖和ii）进行测量，以测量可被吸收并因此得到部分保护的不稳定有机物（葡萄糖）的量在同一土壤中，用生物炭修正或不使用生物炭进行修正。设计了析因实验，以检查三个单一因素（生物炭，养分和葡萄糖）及其对整个SOM矿化作用的影响。将土壤样品接种微生物菌种并接种。预先孵育以确保其生物学活性不受少量微生物生物量的限制，然后将它们在21℃的黑暗中孵育619 d。在整个619天的培养过程中均进行了二氧化氮（CO2）处理，以使活性和缓慢有机物池均发生矿化作用。吸附的葡萄糖量计算为土壤提取物中添加的葡萄糖总量与剩余量之差。选择了两种不同的模型Freundlich和Langmuir模型来评估葡萄糖吸附的平衡等温线。仅当未向土壤中添加生物炭时，CO2-C的释放强烈取决于养分的存在。用生物炭和葡萄糖修正的土壤分别等于两个碳源的矿化总和。此外，在生物炭修正的土壤上可以吸收大量的葡萄糖，这表明物理化学机制参与了不稳定的有机物。物质保护。

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《土壤圈（英文版）》 |2017年第5期|822-831|共10页
作者
Giovanna B.MELAS; Oriol ORTIZ; Josep M.ALACA(N)IZ;
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作者单位

Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Cerdanyola del Vallès 08193 Spain;

Centre de Recerca Ecologica i Aplicacions Forestals CREAF, Cerdanyola del Vallès E08193 Spain;

Dipartimento di Agraria, Universitá degli Studi di Sassari, Viale Italia 39, Sassari 7100 Italia;

Departamento de Ciencias Agrarias y del Medio Natural, Escuela Politécnica Superior de Huesca, Universidad de Zaragoza, Huesca E22071 Spain;

Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Cerdanyola del Vallès 08193(Spain);

Centre de Recerca Ecologica i Aplicacions Forestals(CREAF), Cerdanyola del Vallès E08193 Spain;

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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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Can Biochar Protect Labile Organic Matter Against Mineralization in Soil?

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