Calculating Organic Carbon Stock from Forest Soils

  • Lucian Constantin DINCĂ National Forest Research-Development Institute “Marin Dracea”, 13 Closca, 500035 Brasov
  • Maria DINCĂ National Forest Research-Development Institute “Marin Dracea”, 13 Closca, 500035 Brasov
  • Diana VASILE National Forest Research-Development Institute “Marin Dracea”, 13 Closca, 500035 Brasov
  • Gheorghe SPÂRCHEZ Transilvania University of Brașov, Faculty of Silviculture and Forest Engineering, 1 Șirul Beethoven, 500123 Brașov
  • Liviu HOLONEC University of Agricultural Sciences and Veterinary Medicine, 3-5 Calea Mănăștur, 400372 Cluj-Napoca

Abstract

The organic carbon stock (SOC) (t/ha) was calculated in different approaches in order to enhance the differences among methods and their utility regarding specific studies. Using data obtained in Romania (2000-2012) from 4,500 profiles and 9,523 soil horizons, the organic carbon stock was calculated for the main forest soils (18 types) using three different methods: 1) on pedogenetical horizons, by soil bulk density and depth class/horizon thickness; 2) by soil type and standard depths; 3) using regression equations between the quantity of organic C and harvesting depths. Even though the same data were used, the differences between the values of C stock obtained from the three methods were relatively high. The first method led to an overvaluation of the C stock. The differences between methods 1 and 2 were high (and reached 33% for andosol), while the differences between methods 2 and 3 were smaller (a maximum of 23% for rendzic leptosol). The differences between methods 2 and 3 were significantly lower especially for andosol, arenosol and vertisol. A thorough analysis of all three methods concluded that the best method to evaluate the organic C stock was to distribute the obtained values on the following standard depths: 0 - 10 cm; 10 - 20 cm; 20 - 40 cm; > 40 cm. For each soil type, a correlation between the quantity of organic C and the sample harvesting depth was also established. These correlations were significant for all types of soil; however, lower correlation coefficients were registered for rendzic leptosol, haplic podzol and fluvisol.

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Published
2015-12-10
How to Cite
DINCĂ, L. C., DINCĂ, M., VASILE, D., SPÂRCHEZ, G., & HOLONEC, L. (2015). Calculating Organic Carbon Stock from Forest Soils. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 43(2), 568-575. https://doi.org/10.15835/nbha43210141
Section
Research Articles

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