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001-es BibID:	BIBFORM133400
Első szerző:	Molnár Péter István (Állattenyésztő mérnök)
Cím:	Investigation of Nutrient Removal Capacity and Growth Rate of Duckweed (Lemna minor) Under Different Harvesting Protocols in Aquaponics / Molnár Péter István, Bényi Benedek Csaba, Bársony Péter, Posta János, Fehér Milán
Dátum:	2025
ISSN:	2073-4441
Megjegyzések:	In aquaculture systems, a high proportion of nutrients end up in the water as a by-product of metabolic processes. These must be neutralized through filtration, but to increase efficiency, the integration of some aquatic plants is advisable. Through the nutrient uptake capacity of these plants, the environmental impact of aquaculture systems can be decreased, so they become more sustainable. In this experiment, common duckweed (Lemna minor) was used under different harvesting protocols (control, and 25% and 50% of surface area harvested) to examine the nutrient uptake capacity of the plant and the effects on fish (common carp?Cyprinus carpio) production parameters. It can be concluded that the treatments used did not have a significant effect on fish production parameters. However regular duckweed harvesting had a positive effect on the plant's biomass production and daily growth rate. By the end of the experimental period, the harvested groups had accumulated more biomass than the control group, though there was no difference between the 25% and 50% harvest rates. In our experiment, the control group achieved a yield of 17.9 t/ha/year, while the regularly harvested (25% and 50%) treatments achieved yields of 23.4?24 t/ha/year (based on extrapolated data). Regular harvesting of duckweed resulted in lower ammonia levels, as the free water surface available to the plants after harvesting allowed for more intensive growth, enabling them to absorb more organic matter. The dynamics of nitrite, nitrate and orthophosphate concentrations are primarily determined by the internal biochemical processes of the system and temporal development, while treatments such as duckweed harvesting had no direct effect on these parameters.
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk aquaculture aquaponics common duckweed water quality wastewater management nutrient retention nitrification biological filtration water recycling and reuse monitoring
Megjelenés:	Water. - 17 : 22 (2025), p. 1-17. -
További szerzők:	Bényi Benedek Csaba Bársony Péter (1975-) (agrármérnök) Posta János (1978-) (informatika tanár, agrármérnök) Fehér Milán (1985-) (agrármérnök)
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001-es BibID:	BIBFORM083813
035-os BibID:	(Scopus)85081747794 (WoS)000519846500254
Első szerző:	Szabó Zsuzsanna (környezetgazdálkodási és vidékfejlesztési agrármérnök)
Cím:	Geomorphology as a Driver of Heavy Metal Accumulation Patterns in a Floodplain / Szabó Zsuzsanna, Buró Botond, Szabó József, Tóth Csaba Albert, Baranyai Edina, Herman Petra, Prokisch József, Tomor Tamás, Szabó Szilárd
Dátum:	2020
ISSN:	2073-4441
Megjegyzések:	The spatial complexity of floodplains is a function of several processes: hydrodynamics, flow direction, sediment transportation, and land use. Sediments can bind toxic elements, and as there are several pollution sources, the risk of heavy metal accumulation on the floodplains is high. We aimed to determine whether fluvial forms have a role in metal accumulations. Topsoil samples were taken from point bars and swales in the floodplain of the Tisza River, North-East Hungary. Soil properties and metal concentrations were determined, and correlation and hypothesis testing were applied. The results showed that fluvial forms are important drivers of horizontal metal patterns: there were significant differences (p < 0.05) between point bars and swales regarding Fe, K, Mg, Mn, Cr, Cu, Ni, Pb, and Zn. Vertical distribution also differed significantly by fluvial forms: swales had higher metal concentrations in all layers. General Linear Models had different results for macro and micro elements: macro element concentrations were determined by the organic matter, while for micro elements the clay content and the forms were significant explanatory variables. These findings are important for land managers and farmers because heavy metal concentration has a direct impact on living organisms, and the risk of bioaccumulation can be high on floodplains.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk fluvial landforms swale point bar topsoil samples vertical contamination General Linear Model (GLM)
Megjelenés:	Water. - 12 : 2 (2020), p. 1-16. -
További szerzők:	Buró Botond (1986-) (geográfus) Szabó József (1940-) (geográfus) Tóth Csaba Albert (1971-) (geográfus) Baranyai Edina (1987-) (környezetkutató) Herman Petra (1994-) (környezetkutató) Prokisch József (1966-) (vegyész) Tomor Tamás (1976-) (geográfus) Szabó Szilárd (1974-) (geográfus)
Pályázati támogatás:	GINOP-2.3.2-15-2016-00009'ICER' Egyéb ÚNKP-18-3 New National Excellence Program of the Ministry of Human Capacities Egyéb
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