Organic Carbon Decomposition in Soil Amended With Organic Compost From Slaughterhouse Residues
| Autor: | Magnum de Sousa Pereira, Julius Blum, Henrique Antunes de Souza, Carlos Kenji Taniguchi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Total organic carbon
chemistry.chemical_classification Compost Soil organic matter Water stress 04 agricultural and veterinary sciences engineering.material Decomposition 03 medical and health sciences 0302 clinical medicine chemistry Environmental chemistry 040103 agronomy & agriculture engineering 0401 agriculture forestry and fisheries Organic matter Soil protection 030217 neurology & neurosurgery |
| Zdroj: | Journal of Agricultural Science. 10:7 |
| ISSN: | 1916-9760 1916-9752 |
| DOI: | 10.5539/jas.v10n8p7 |
| Popis: | Decomposition kinetic of applied compost in soil depends on the decomposition rate coefficient (k), environmental conditions and the interactions with soil. However, studies with the aim of determining k values for different materials rarely consider interactions with soil. The objective of the current study was to estimate k value of an organic compost, considering the interactions with the soil. Samples of soil mixed with compost were incubated in hermetic recipients for 126 days and evolved C-CO2 was quantified. Nonlinear models proposed in the present study were fitted to evolved C-CO2 data. Better fitting was found in a model that divided the soil organic matter in four pools (labile and recalcitrant native soil organic matter; protected and unprotected added organic matter), values of k on both native organic matter pools were multiplied by a constant denominated priming (pr) only in the cases where the compost was added to the soil and the amount of C in the protected pool is limited to the soil protection capacity. Organic compost produced using carcasses, sheepfold residues and slaughterhouse residues presented k value equal to 0.01179 day-1 at 31 oC without water stress. Compost application increased in 9.8% the decomposition of the native soil organic matter. |
| Databáze: | OpenAIRE |
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