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| Barthel,Lígia; Oliveira,Paulo Armando Victória de; Costa,Rejane Helena Ribeiro da. |
| This study aimed at analyzing the plankton biomass found in a piggery waste treatment system, composed of a high rate algal pond (HRAP), two maturation ponds (MP1, MP2) (System A) and a water hyacinth pond (WHP) (System B). The ponds were disposed in series and the study was performed for 32 weeks. The physicochemical variables monitored were: pH, temperature, dissolved oxygen, soluble chemical oxygen demand, nitrogen compounds and total phosphorus. The plankton biomass was identified at genus level and the ecology index was calculated so as to describe its development in the ponds. Results showed lower specific richness, which was associated to the mono-specific Chlorella sp population. The protozoa density was conversely proportional to the green algae... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecologic index; Piggery waste; Plankton biomass; Ponds treatment. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600025 |
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| Nicoloso,Rodrigo da Silveira; Bayer,Cimélio; Denega,Genuir Luis; Oliveira,Paulo Armando Victória de; Higarashi,Martha Mayumi; Corrêa,Juliano Corulli; Lopes,Letícia dos Santos. |
| Assessments of soil carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) emissions are critical for determination of the agricultural practices' potential to mitigate global warming. This study evaluated the photoacoustic spectroscopy (PAS) for the assessment of soil greenhouse gases (GHG) fluxes in comparison to the standard gas chromatography (GC) method. Two long-term experiments with different tillage and cropping systems over a Paleudult were evaluated using static chambers. PAS measurements of CO2 and N2O concentrations showed good relationship and linearity (R2=0.98 and 0.94, respectively) with GC results. However, CH4 measurements were significantly affected by air sample moisture which interfered on CH4 detection by PAS. Overestimation of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: No-tillage; Conventional tillage; Cover crops; INNOVA 1412. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000200012 |
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| Sardá,Luana Goulart; Higarashi,Martha Mayumi; Nicoloso,Rodrigo da Silveira; Oliveira,Paulo Armando Victória de; Falkoski,Camila; Ribeiro,Stephanie Mayara Siega; Coldebella,Arlei. |
| Abstract: The objective of this work was to contribute to the establishment of a baseline for the methane emission factor for the management of swine manure, considering the current practice of raw manure storage in two open deposits in parallel, in Southern Brazil. Methane (CH4) emissions were continuously measured in three PVC tanks of 3 m3, during 180 days, in the summer. As the content of volatile solids of pig slurry ran out in approximately 130 days, the CH4 emission factor was calculated as B0= 0.48 m3kg-1VS. Although this value is higher than the B0 estimated by Intergovernmental Panel on Climate Change for Latin America (0.29 m3 kg-1 VS), it is in agreement with the B0 estimated for developed countries (0.45 and 0.48 m3 kg-1 VS, for the US and EU,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal production; Emission factor; Global warming; Greenhouse gases; Waste management. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600657 |
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