| Autor: |
Celso Aita, Deborah Pinheiro Dick, Marlon H. Arenhardt |
| Rok vydání: |
2012 |
| Předmět: |
|
| Zdroj: |
Functions of Natural Organic Matter in Changing Environment ISBN: 9789400756335 |
| DOI: |
10.1007/978-94-007-5634-2_44 |
| Popis: |
One of the main economical activities of small farms in South Brazil is the swine production which produces a relatively high amount of pig slurry. The discard of this effluent as “in natura” in the environment may contaminate the soil and impair the crops. Therefore, the aim of this study was to monitor the humification of swine slurry conducted in windrows, employing two different pH conditions. The composting of pig slurry was conducted with a 50% (m/m) mixture of sawdust and wood shaving in two pH conditions. The liquid pig slurry was weekly added at different rates and the total added amount of dry matter was approximately 82 kg in 3 months. In the weekly collected samples, the contents of C and N were determined and the humic substances (HS) were quantified. The C content of compost did not vary with time, while the decrease of C/N ratio indicated the humification of the slurry mixture. These results were corroborated by the increase of CHS and that of CHA/CFA ratio within 3 months. The acidic medium enhanced the formation of humic acid (HA) over fulvic acid (FA). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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