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Phosphorus Accumulation in the Dehydrated Peat Soils of the Liwiec River Valley

Becher Marcin, Pakuła Krzysztof, Jaremko Dawid

Journal of Ecological Engineering

2020

Vol. 21, nr 5

213--220

The aim of the research was to complement the knowledge on profile distribution and accumulation of phosphorus forms in the soils changed under the influence of secondary organic matter transformation process in dehydrated peatlands. The soil research was carried out in the upper Liwiec river valley in the middle-east of Poland. In the soil material taken from the moorsh (M1, M2, M3) and peat (O) horizons of the Murshic Histosols, the physical and chemical properties were determined and the soil phosphorus fractions with different activity in the environment by sequential extraction method were separated. The profile distribution of the total phosphorus content (TP) and values of carbon/phosphorus (TC/TP) ratio were characteristic for dehydrated peat soils included in the secondary transformation process (M1>M2>M3>O). This process also increased the contribution of the available phosphorus forms (NH4Cl-P), forms bound on the surface of iron (III) and manganese (IV) oxides and hydroxides (redox-P), as well as mineral (mHCl-P) and organic (oHCl-P) forms separated by 0.5 M HCl. Significant accumulation of the phosphorus compounds in the moorsh horizons of the investigated soils can be considered as a potential threat to the natural environment of the studied area due to the risk of decomposition of the phosphorus compounds when the area will be rehydrated.

Zawartość makroelementów w wybranych gatunkach grzybów jadalnych

Kuziemska Beata, Wysokiński Andrzej, Pakuła Krzysztof, Jaremko Dawid, Czapliński Krzysztof

Inżynieria Ekologiczna

2019

Vol. 20, nr 4

1--4

Celem przeprowadzonych badań było określenie zawartości wybranych makroelementów – N, P, K, Ca, Mg, Na i S w grzybach pochodzących z upraw celowych – pieczarce białej i brązowej (Agaricus bisporus) oraz boczniaku ostrygowatym (Pleurotus ostreatus). Grzyby zakupiono w sklepach lokalnych sieci handlowych w Siedlcach. Zawartość azotu ogółem oznaczono metodą analizy elementarnej na analizatorze CHN z detektorem przewodności cieplnej (JDC), natomiast pozostałych pierwiastków metodą spektrometrii emisyjnej z plazmą indukcyjnie wzbudzoną, po wcześniejszej mineralizacji na „sucho” w piecu muflowym w temperaturze 450°C i rozpuszczeniu popiołu w 10% roztworze HCl. Badania wykazały istotne zróżnicowanie zawartości składników mineralnych w analizowanych gatunkach grzybów. Najwięcej N, P, K, Ca, Na i S zawierały owocniki pieczarki brązowej a Mg boczniaka ostrygowatego. Najmniej N, P, K, Ca, Na i S oznaczono w owocnikach boczniaka ostrygowatego a Mg w pieczarce białej.

The aim of the study was to determine the content of selected macroelements - N, P, K, Ca, Mg, Na and S in mushrooms from target crops - white and brown mushrooms (Agaricus bisporus) and oyster mushrooms (Pleurotus ostreatus), which were purchased in stores of local retail chains. Total nitrogen content was determined by elemental analysis on a CHN analyzer with the thermal conductivity detector (TCD), while the other elements by inductively coupled plasma atomic emission spectrometry (ICP-AES), after dry digestion in a muffle furnace at 450°C and dissolution of ash in 10% HCl solution. The conducted research revealed a significant diversity of the chemical composition in the analyzed species of mushrooms. The highest content of N, P, K, Ca, Na, S were determined in the fruiting bodies of the brown mushrooms, and Mg - in oyster mushrooms. The smallest content of N, Ca, Na and S was found in the fruiting bodies of the oyster mushrooms and Mg - in white mushrooms.