Correction Equations for Wet Combustion Carbon Determination at Different Depths and Management Systems of a Rhodic Hapludox

Ademir De Oliveira Ferreira (), João Carlos Moraes Sã¡, Josiane Burkner Dos Santos, Clever Briedis and Thiago Massao Inagaki
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Ademir De Oliveira Ferreira: University of Ponta Grossa (UEPG), Soil Organic Matter Laboratory (LABMOS), Av. Carlos Cavalcanti 4748, 84030-900, Ponta Grossa, PR, Brazil
João Carlos Moraes Sã¡: University of Ponta Grossa (UEPG), Soil Organic Matter Laboratory (LABMOS), Av. Carlos Cavalcanti 4748, 84030-900, Ponta Grossa, PR, Brazil
Josiane Burkner Dos Santos: Agronomic Institute of Paraná – IAPAR, Polo regional de Ponta Grossa, Av. Presidente Kennedy, s/n°, Ponta Grossa-PR, Brazil
Clever Briedis: University of Ponta Grossa (UEPG), Soil Organic Matter Laboratory (LABMOS), Av. Carlos Cavalcanti 4748, 84030-900, Ponta Grossa, PR, Brazil
Thiago Massao Inagaki: University of Ponta Grossa (UEPG), Soil Organic Matter Laboratory (LABMOS), Av. Carlos Cavalcanti 4748, 84030-900, Ponta Grossa, PR, Brazil

Journal of Agriculture and Crops, 2015, vol. 1, issue 6, 75-82

Abstract: Measurement of soil carbon is the focus of attention of present and future international conventions and agreements, related to global climate change. Past inventories and current carbon stock inventories involve different analytical methods, and methodological biases and uncertainties should be reduced to develop reliable estimates of the effects of land uses changes on total organic carbon. Furthermore, the carbon-equivalent is highly variable, and there is the need of using a specific correction factor for each location, resulting from the combination of land use, textural gradients, and sampling depth. In this context, the aims of this study were creating correction equations for the determinations through wet combustion (Walkley-Black- WB) for a Rhodic Hapludox based on the determinations made through dry combustion (CS) at different depths and management systems. Â The experimental design was 4 x 5 factorial with 3 replications. Treatments were: Conventional Tillage (CT); Minimum Tillage (MT); No-till with chisel plowing (NTC) and No-Till (NT). The collection depths were: 0-2.5; 2.5-5; 5-10; 10-20 and 20-40 cm. The measured carbon equivalent values ranged from 1.06 to 1.18 and were dependent on land use and soil depth. Rhodic Hapludox under different management presented the following order of carbon equivalent values: NTC

Keywords: Dry combustion; Walkley-Black; Correction factor. (search for similar items in EconPapers)
Date: 2015
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