Comparison of Two Methods for Total Inorganic Carbon Estimation in Three Soil Types in Mediterranean Area

Land

Mirko Castellini¹  Carolina Vitti¹  Marcello Mastrangelo¹  Rita Leogrande¹  GaetanoAlessandro Vivaldi²  AnnaMaria Stellacci³  Francisco Pedrero⁴ 

[1] Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment (CREA-AA), Via C. Ulpiani, 5, 70125 Bari, Italy;Department of Agricultural and Environmental Science (DiSAAT), Bari University, 70126 Bari, Italy;Department of Soil, Plant and Food Sciences (DiSSPA), Bari University, 70126 Bari, Italy;Irrigation Department, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Campus Universitario de Espinardo, 30100 Murcia, Spain;

关键词: calcimeter;    dry combustion;    calcium carbonate;    soil sampling;    regression equation;   

DOI  :  10.3390/land10040409

来源: DOAJ

【 摘 要 】

The objective of this study was to compare the results of calcimetric and dry combustion methods for quantitative estimation of soil total inorganic carbon (TIC). To this aim, 117 soil samples from three localities in the Mediterranean area (one in Spain and two in Southern Italy), representing a wide range of total inorganic carbon contents (ranging from 1.9 to 54 g 100g⁻¹), were collected. TIC (expressed as CaCO₃) was quantified using the volumetric calcimeter method, as reference, and dry combustion in order to find an accurate and rapid method, suitable for different types of soils. The results revealed a concordance between the two methods compared, as shown by the recovery values close to one, for the whole data set and for data grouped per experimental site. Specifically, the dry combustion method showed slightly greater values of TIC compared to volumetric method, probably due to soil acid pretreatments, in dry combustion, and to an incomplete decomposition of carbonates that would require more time for removal, in a calcimeter method. Linear regression equations between the two methods were not affected by different soil types. Overall, our study demonstrated that the dry combustion was a reliable method and could provide accurate estimates of TIC in soils with different calcium carbonate content.

【 授权许可】

Unknown