EJPAU, 2004, Volume 7, Issue 1
Environmental Development

In laboratory experiment the influence of different dosages of fungicides on the activity of acid and alkaline phosphatase, dehydrogenase, urease, b-glucosidase and ATP content in loamy clay soil was determined. The fungicides were applied alone and with additions of an adiuvants applied at field rate and 10-fold and 100-fold higher. The following combinations were used: Miedzian 50 WP (a.i. copper oxychloride), Miedzian 350 extra SC (Miedzian 50 WP + Polybutene emulsion) and Miedzian 50 WP applied together with Rapol 90 EC. The soil sample was submitted to analysis in 1, 3, 7, 14, 28, 56 and 112 days after the pesticides treatment. The investigations showed that soil enzymes activity after use pesticides with adiuvants was lower from activities these enzymes in soil after use of fungicides without adiuvants, it was especially visible in case of dehydrogenase and b-glucosidase. Also ATP content in soil with addition all of three

Extensive exploitation of groundwater from quaternary deposits of fluvioglacial origin, reaching annually over 1.5 mln m³ in Retków–Stara Rzeka water intake, affected both chemical composition and physical properties of water. Detrimental changes in water quality were manifested mainly by an increased alkalinity, hardness, electrolytic conductivity as well as by raised concentration of iron and manganese ions or sulphates. The value of water alkalinity has increased from below 1 meq/dm³ to over 4.5 meq/dm³ in 1986 and 1994, respectively. Conductivity, strongly related to overall mineralisation of water (Total Dissolved Solids – TDS content), over the same period increased on average from about 150 µS/cm to over 550 µS/cm, and in some wells reached nearly 900 µS/cm. Total water hardness increased in the respected period from 60 mg CaCO₃/dm³ to 300 mg CaCO₃/dm³, sporadi

The presented paper is an edited version of the part of Ph.D. thesis of the same title and by the same author. The main aim of the research was to assess the state of peat formation process on post-harvested fields of the selected raised bogs in the Orawa – Nowy Targ Basin on the basis of the acrotelm layer self-regeneration. The results revealed that the peat formation process takes place on six from among eight investigated bogs and statistical analysis of the percentage coverage by three plant groups proved that there are significant differences between them. The attempt to determine the rate of organic mass increase on post-mined areas by means of dendrological method was undertaken. Survey results suggest that the rate of organic mass accumulation on the investigated areas is high and depends on local conditions.

Velocity fluctuations and turbulence of velocity in mountain rivers varys when the flow parameters change from free flow conditions to clogged cross-section. The first part of the paper is devoted to extending the description of turbulence intensity distribution in rough flow conditions. In the second part the effect of growth of ligneous water plants in the bed on turbulence intensity is presented.

The aim of the experiment was to determine the effect of cadmium (10, 20, 30 and 40 mg Cd ˇ kg^-1 soil) on phosphorus uptake in plants. Neutralising matter, including compost, brown coal, lime and bentonite, was introduced into the soil for a basic pot experiments. Correlation between the phosphorus content and the cadmium contamination in the soil, plant yield and the macro- and microelements content in the plants were determined. The effect of soil contamination with cadmium on the phosphorus content was related to the species and the organs of plants. High cadmium concentration in the soil caused the phosphorus content in the grain and roots of oats, in maize root and in the above-ground parts of yellow lupine to increase. Such a correlation was not observed for oats straw, roots of yellow lupine and above-ground parts and roots of radish. Soil supplementation with brown coal, lime and bentonite resulted in a decrease in the phosphorus content, whereas the supplement