THE TECHNOLOGICAL WATER NITROGEN COMPOUNDS DYNAMICS IN THE EXPERIMENTAL PONDS, INLET AND OUTLET CHANNELS
| Autor: | Metaxa Isabelle, Mogodan Alina, Costache Mioara, Simionov Ira-Adeline, Petrea Ștefan-Mihai, Platon Cătălin |
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| Rok vydání: | 2019 |
| Předmět: |
lcsh:GE1-350
0106 biological sciences geography geography.geographical_feature_category 010604 marine biology & hydrobiology integrated multi-trophic aquaculture Environmental engineering chemistry.chemical_element Ocean Engineering nitrogen compounds 04 agricultural and veterinary sciences sustainable systems Inlet water quality pond aquaculture 01 natural sciences Nitrogen chemistry 040102 fisheries 0401 agriculture forestry and fisheries Environmental science lcsh:Environmental sciences |
| Zdroj: | Present Environment and Sustainable Development, Vol 13, Iss 2, Pp 259-277 (2019) |
| ISSN: | 2284-7820 1843-5971 |
| DOI: | 10.15551/pesd2019132020 |
| Popis: | This study aims to identify proper solutions that can improve the sustainability of cyprinids pond aquaculture in terms of nitrogen releases to the environment. Therefore, two experimental variants, based on polyculture, respectively integrated multi-trophic aquaculture (IMTA) concept were tested, as follows: PCP – polyculture of common carp (CC) + grass carp (GC) + bighead carp (BC) + silver carp (SC); CP-PP – net divided pond with CC monoculture in CP part and CC+GC+BC+SC polyculture in PP part. In order to determine the nitrogen accumulation at the pond level, samples of water, sediments, fish meat and reed were analyzed. The results indicate that the highest nitrogen compounds concentrations in pond water were registered at CP part of CP-PP pond. However, the nitrogen concentration in pond effluents was significant higher in case of CP-PP pond, compared with PCP pond. The nitrogen compounds concentration of sediments registered the highest values in the ponds outlet area. Also, CP-PP pond recorded higher nitrogen concentration in sediments, compared with PCP pond. The CC registered the highest nitrogen compounds concentration in case of PP pond area, followed by CP pond area and PCP pond. Not significant correlation was found between reed and pond water/ fish meat/ sediments in terms of nitrogen compounds concentration. It can be concluded that the CP-PP pond feeding management, together with the tested technical solution (pond dividing) generated better water conditioning performances. |
| Databáze: | OpenAIRE |
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