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The Influence of the Zebra Mussel (Dreisena Polymorhpa) on Magnesium and Calcium Concentration in Water

100%
Wojtal-Frankiewicz A., Frankiewicz P.
Acta Universitatis Lodziensis. Folia Biologica et Oecologica
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2010
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vol. 6
81-101
EN
In this study we examined changes in magnesium and calcium ion concentrations depending on Zebra Mussel biomass, pH values and temperature. We performed field experiments in years with different weather conditions using twelve 200 litre polycarbonate containers filled with 150 litres of non-filtered water from lowland, eutrophic reservoirs. Three treatments of the experiment were represented by: Phyto control with non-filtered water, Phyto+Dreis A with Zebra Mussel biomass of 500 g/m2, and Phyto+Dreis B with Zebra Mussel biomass of 1.000 g/m2. Magnesium and calcium ions concentrations were analyzed on an ion chromatograph (Dionex-1000). Results indicated a significant reduction in magnesium and calcium ion concentrations by Zebra Mussels (independent of mussel biomass), especially in the year with higher and more stable average temperatures. Mg concentration was significantly negatively correlated with temperature in this year. In both years of study the magnesium and calcium ion concentrations were negatively correlated with pH. Analyses of the Zebra Mussel’s impact on magnesium and calcium loss from water, linked with the influence of physical factors (temperature and pH), may be valuable for the management of invaded ecosystems.
2
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The effect of hard coal ashes on the amount and quality of maize yield

72%
Antonkiewicz J.
Polish Journal of Chemical Technology
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2007
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vol. 9
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issue 3
20-25
EN
The research was conducted in 2003 - 2005 as a pot experiment on mineral soil to which ash doses of between 13.33 g and 800.0 g · pot-1 were supplied in proportions corresponding to the amounts of between 10 and 600 t · ha-1. The investigations aimed at learning the effect of diversified ash doses upon the content, ionic relations and the uptake of Mg, Ca, Na and P by maize. Macroelement concentrations in maize were diversified depending on the object and the plant part, fluctuating from 1.52 - 7.49 g Mg; 3.79 - 11.01 g Ca; 8.07 - 23.86 g K; 0.17 - 1.52 g Na; 1.23 - 3.16 g P · kg-1 d.m. It was found that with the growing ash dose the contents of Mg, Ca, K and Na in maize were increasing systematically, whereas P concentrations were decreasing. Magnesium and potassium content in maize aboveground parts met the requirements for a good quality fodder. The level of calcium, sodium and phosphorus in maize did not remain within the optimal range. A systematic increase in Mg uptake but a decline in P absorption by the aboveground parts were registered in maize in effect of growing ash doses.
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2018. Contents of selected macronutrients in bottom sediments of two water reservoirs and assessment of their suitability for natural use

72%
Wójcikowska-Kapusta A., Smal H., Ligęza S.
Journal of Water and Land Development
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2018
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issue 38
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