Dynamics of the phytoplankton community and physical and chemical variables in experimental tanks with different organic manure
The influence of different types of organic manure in the phytoplankton community is provided. Experiment was undertaken during 40 days in 1000L asbestos tanks. Tanks were fertilized with poultry (PO), pig (PI), cattle (CA) and rabbit (RA) manure, in a randomized design, with four treatments and fiv...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| País: | Brasil |
| Institución: | Universidade Estadual de Maringá (UEM) |
| Repositorio: | Acta Scientiarum Biological Sciences |
| Idioma: | portugués |
| OAI Identifier: | oai:periodicos.uem.br/ojs:article/2685 |
| Acceso en línea: | http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2685 |
| Access Level: | acceso abierto |
| Palabra clave: | adubação orgânica fitoplâncton produtividade primária 2.00.00.00-6 Ciências Biológicas |
| Sumario: | The influence of different types of organic manure in the phytoplankton community is provided. Experiment was undertaken during 40 days in 1000L asbestos tanks. Tanks were fertilized with poultry (PO), pig (PI), cattle (CA) and rabbit (RA) manure, in a randomized design, with four treatments and five replications. First fertilization consisted of 50 g of manure, with 25 g fertilizations at seven-day intervals. Plankton was collected every three days by filtering 250 mL of water in a 20 µm net and fixed in 10 mL formaldehyde 2%. Qualitative and quantitative analysis was undertaken by optic microscope. At the same time, physical and chemical variables were monitored. Highest mean density of phytoplankton was detected with PO on the 40th day (26,842 org./L), followed by PI (17,164 org./L) on the 22nd day, RA (8,880 org./L) on the 28th day and CA (5,564 org./L) on the 22nd day. Genera Scenedesmus, Cyclotella and Acanthosphaera were predominant. pH values and electrical conductivity oscillated according to changes in phytoplankton densities. PO had the best values of parameters in most collections. Different treatments influenced density of phytoplankton groups. Highest density of algae was obtained by poultry manure, and successively by pig, rabbit and cattle manure |
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