Accurate and Precise Measurement of Organic Carbon Content in Carbonate-Rich Soils

被引：19

作者：

Dhillon, Gurbir Singh ^{[1
]}

Amichev, Beyhan Y. ^{[1
]}

De Freitas, Renato ^{[1
]}

Van Rees, Ken ^{[1
]}

机构：

[1] Univ Saskatchewan, Dept Soil Sci, Saskatoon, SK S7N 5A8, Canada

来源：

COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS | 2015年 / 46卷 / 21期

关键词：

Carbon (C) analysis methods comparison; HCl-acid fumigation of carbonaceous soils; soil organic carbon (SOC); soil inorganic carbon (SIC); soil grinding effects on SOC measurement precision; MARINE-SEDIMENTS; NITROGEN; MATTER; SASKATCHEWAN; CULTIVATION;

D O I：

10.1080/00103624.2015.1089271

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Accurate measurement of soil organic carbon (SOC) is dependent on precise and fast methods for the separation of organic and inorganic carbon. The widely used methods involving thermal decomposition of soil samples at a specific temperature in an automated carbon (C) analyzer are susceptible to interference by carbonates and overestimation of organic C, and thus removal of carbonates by acid pretreatment of samples is recommended. Two carbonate-removal pretreatments including hydrochloric (HCl) acid addition and HCl fumigation are compared using the calcium carbonate (CaCO3) standard and soil samples of varying SOC contents. Both pretreatment methods provided similar measurements of organic C, indicating that both methods are efficient in removal of carbonates present in the soil. However, the HCl fumigation method exhibited greater accuracy and precision compared to the HCl addition method. Hence, SOC measurement procedure involving HCl fumigation as a pretreatment for the removal of carbonates is recommended for carbonate-rich soils.

引用

页码：2707 / 2720

页数：14

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