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2 results on '"pedogenic carbon"'

1. The pool of pedogenic carbon in the soils of different types and durations of use as croplands in the forest-steppe of the Central Russian Upland.

Author

Khokhlova, O., Chendev, Yu., Myakshina, T., and Shishkov, V.

Subjects
*CARBON, *RADIOCARBON dating, *AGRICULTURE, *HUMUS, *FERTILIZERS
Abstract

Based on studying five agrochronoseries, including recent forest (dark) gray soils and soils plowed for 100, 150, and 200-240 and more years in the forest-steppe zone of the Central Russian Upland, the dynamics of the pedogenic carbon pool, including the C and C, are considered. In the 2-m-thick layer of the agrogenic soils studied, the pedogenic carbon pool was shown to increase by 15-30% (up to 50%) mainly due to the changes in the C content. The insignificant (by ∼10%) growth of the C content was found in the soils that were plowed for more than 200-250 years. As the hydrothermal regime changed when passing from the forest to croplands, the C reserves increased due to the ascending of carbonates from the parent rock through the capillary pores, probably, in colloid solution-suspensions. This process proceeded without exchange with the soil CO, since the C age and the content of the newly formed carbonates became higher. These carbonates may be called pedogenic-lithogenic agrocarbonates, since they appear in soils as a result of the (agro-) pedogenesis. In this case, their additional source is the lithogenic carbonates, which bring in the 'old' carbon. The process of carbonates ascending could be referred to the rapid soil-forming ones with their implementation time being close to ≤50 years. [ABSTRACT FROM AUTHOR]

Published
2013
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2. Biogeochemistry of Carbon on Disturbed Forest Landscapes

Author

Amichev, Beyhan Y., Forestry, Burger, James A., Zelazny, Lucian W., Galbraith, John M., Prisley, Stephen P., Daniels, W. Lee, and Fox, Thomas R.

Subjects
decision support system, soil organic carbon sequestration, pedogenic carbon, mine soils, wood products, field protocol for carbon inventory, geogenic carbon
Abstract

Carbon accreditation of forest development projects is essential for sequestering atmospheric CO2 under the provisions of the Kyoto Protocol. The carbon sequestration potential of surface coal-mined lands is not well known. The purpose of this work was to determine how to measure carbon sequestration and estimate the additional amount that could be sequestered using different reforestation methods compared to the common practice of establishing grasslands. I developed a thermal oxidation technique for differentiating sequestered soil carbon from inorganic and fossilized carbon found at high levels in mine soils along with a geospatial and statistical protocol for carbon monitoring and accounting. I used existing tree, litter, and soil carbon data for 14 mined and 8 adjacent, non-mined forests in the Midwestern and Eastern coal regions to determine, and model sequestered carbon across the spectrum of site index and stand age in pine, mixed, and hardwood forest stands. Finally, I developed the framework of a decision support system consisting of the first iteration of a dynamic model to predict carbon sequestration for a 60-year period for three forest types (white pine, hybrid poplar, and native hardwoods) at three levels of management intensity: low (weed control), medium (weed control and tillage) and high (weed control, tillage, and fertilization). On average, the highest amount of ecosystem carbon on mined land was sequestered by pine stands (148 Mg ha-1), followed by hardwood (130 Mg ha-1) and mixed stands (118 Mg ha-1). Non-mined hardwood stands contained 210 Mg C ha-1, which was about 62% higher than the average of all mined stands. After 60 years, the net carbon in ecosystem components, wood products, and landfills ranged from 20 to 235 Mg ha-1 among all scenarios. The highest net amount of carbon was estimated under mixed hardwood vegetation established by the highest intensity treatment. Under this scenario, a surface-mined land of average site quality would sequester net carbon stock at 235 Mg C ha-1, at a rate of 3.9 Mg C ha-1 yr-1, which was 100% greater than a grassland scenario. Reforestation is a logical choice for mined land reclamation if carbon sequestration is a management objective. Ph. D.

Published
2007

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