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1

Owocujące pędy - ważny materiał florystyczny (cz.II)

100%
Mackiewicz-Walec E.
Hasło Ogrodnicze
|
2013
|
nr 04
2

Owocujące pędy - ważny materiał florystyczny (cz.I)

100%
Mackiewicz-Walec E.
Hasło Ogrodnicze
|
2013
|
nr 03
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

The effect of different proportions of Medicago media Pers. in two-component alfalfa-grass mixtures on the macronutrient content of aboveground biomass

63%
Olszewska M., Mackiewicz-Walec E.
Journal of Elementology
|
2023
|
tom 28
|
nr 4
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Effect of sulfur fertilization on the concentrations of copper, zinc and manganese in the roots, straw and oil cake of rapeseed (Brassica napus L. ssp. oleifera Metzg)

45%
Jankowski K., Kijewski L., Skwierawska M., Krzebietke S., Mackiewicz-Walec E.
Journal of Elementology
|
2014
|
tom 19
|
nr 2
Sulfur application has a significant effect on the yield of oil bearing plants of the family Brassicaceae , especially when the sulfur content of soil is low . Sulfur fertilization also affects the value of plant raw materials, reflected by the concentrations of mineral and biologically active compounds in biomass. The aim of this study was to determine the effect of sulfur application to soil on the concentrations of copper, zinc and manganese in the root residues, straw and oil cake of winter and spring rapeseed. A three-year (2005-2008) field experiment was conducted at the Agricultural Experimentation Station in Bałcyny (NE Poland). In both spring and winter rapeseed, oil cake contained the highest levels of copper and zinc, followed by root residues and straw. The highest concentrations of manganese per kg dry matter (DM) were found in the root residues of winter rapeseed and in the cake of spring rapeseed. The concentrations of micronutrients (Cu, Zn, Mn) were slightly higher in the roots of winter rapeseed, compared with spring rapeseed. Sulfur fertilization decreased copper levels and increased manganese levels in the root residues of spring and winter rapeseed. Sulfur application to soil increased zinc concentrations in winter rapeseed roots, and it had no significant influence on the zinc content of spring rapeseed roots. Spring rapeseed straw contained considerably higher levels of zinc and manganese than winter rapeseed straw. The copper content of straw was comparable in spring and winter rapeseed. Sulfur application to soil increased the concentrations of zinc and manganese in winter rapeseed straw, and it had no significant effect on the levels of those minerals in spring rapeseed straw. Spring rapeseed cake had a significantly higher content of copper and zinc, compared with winter rapeseed cake. Manganese concentrations in the cake of spring and winter rapeseed were similar. Sulfur fertilization contributed to a significant increase in the concentrations of zinc and manganese in winter rapeseed cake. The manganese content of spring rapeseed cake decreased significantly in response to sulfur fertilization, which had no effect on the concentrations of the other micronutrients.
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Sulphur in the Polish fertilization diagnositcs

45%
Skwierawska M., Krzebietke S., Jankowski K., Benedycka Z., Mackiewicz-Walec E.
Journal of Elementology
|
2014
|
tom 19
|
nr 1
Over the years, researchers from Polish research centres have been improving analytical methods as well as plant and soil assays, designed to diagnose demands of crops for sulphur fertilization and to assess their supply with this element. In this article, the authors look back at the last 100 years of the Polish research on sulphur, in the context of analytical methods, soil and plant assays, and their application to assessments of crop fertilization requirements. Studies on diagnosing crops’ demand for sulphur fertilization have a long-standing tradition. Back in 1903, for example, Godlewski and Jentys wrote about nutritional demands of crops and about sulphur nutrition. For over a century since then, the analytical methods have changes, soil and plant assays have been designed and parameters have been established to facilitate assessment of plant nutrient demands. Sulphur-oxidizing autotrophic microorganisms or the fungi Aspergillus niger have been used for diagnosis. Another investigated possibility was monitoring the capacity of sulphur for migration, assayed in lisymetric experiments. The 1960s were a time when modifications of earlier turbimetric methods appeared. In addition, applications of the isotope 35S were checked as a sulphur marker enabling determination of the dynamics of this element in soil and in plants. With the passing of time, new technologies and measuring devices were developed. Some research centres implemented sulphur detection assays on soil and plant material with the following methods: ICP, GC, HPLC or XPF (x-ray fluorescent analysis). With respect to soil and plant tests, which admittedly are a very useful tool for monitoring the sulphur abundance in soil and nutritional demands of plants, it is now the time to state that they need further verification and calibration, in both pot and field experiments.
6

Content of microelements in tubers of potato treated with biostimulators

45%
Wierzbowska J., Cwalina-Ambroziak B., Bowszys T., Glosek-Sobieraj M., Mackiewicz-Walec E.
Polish Journal of Natural Sciences
|
2015
|
tom 30
|
nr 3
Three times every 10-14 days, starting from the BBCH 39 phase, four cultivars of edible potatoes were treated with the following bio-stimulants: Asahi SL, Bio-Algeen S90 or Kelpak SL. The control object was plants potato sprayed with distilled water. The large amount of precipitation in the first year of the research contributed to an increased content of Fe and Mn in the potato tubers. The tubers of potatoes treated with Kelpak SL had the highest content of Zn, Mn, Fe and Cu. The highest content of B was found after the potatoes were sprayed with Asahi SL. Compared to the control plants, Bio-Algeen S90 reduced the content of Zn, Mn, Fe and Cu. The content of microelements in the tubers was significantly dependent on the genotype. The highest concentration of Zn, Mn and B was found in the tubers of the cv. Volumia, the highest concentration of Fe and Cu – in the tubers of the cv. Sylvana, and the highest concentration of Ni – in the tubers of the cv. Satina. The uptake of microelements with the potato harvest depended more on the cultivar, in particular its yield, than on the biostimulators that were used.
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Changes in sulphur dioxide concentrations in the atmospheric air assessed during short-term measurements in the vicinity of Olsztyn, Poland

45%
Rogalski L., Smoczynski L., Krzebietke S., Lenart L., Mackiewicz-Walec E.
Journal of Elementology
|
2014
|
tom 19
|
nr 3
Sulphur dioxide is one of the principal gases responsible for the quality of atmospheric air. Air pollution, even relatively low one, is not indifferent to human health. In 2007-2009, an investigation was carried out to follow changes in the concentration of sulphur dioxide in atmospheric air, in different time intervals, depending on the air temperature and humidity. This paper draws on results of continuous measurements taken at the Station of Monitoring the Immission of Air Pollutants in Olsztyn-Kortowo. The measured concentrations of SO2 were presented graphically as means for different time intervals. It has been demonstrated that changes in SO2 concentrations were mainly induced by drops in temperatures, emissions and other industrial actitivities, as well as the course of the growth and development of plants. The highest concentrations appeared at noon and the lowest ones were at night. Analysis of similarities verified hourly variations in the SO2 concentrations in air. Four distinc groups were distinguished: nocturnal (1:00-7:00 a.m.), mid-day (10:00 a.m.-3:00 p.m.), a group with two time intervals (8:00- 9:00 a.m.; 4:00-7:00 p.m.) and late evening (8:00 p.m. - midnight). Considering the aerial concentration levels of this gas in monthly intervals, high similarity was observed between the early spring versus the autumn and winter seasons. Dependences between SO2 concentrations and temperature were confirmed by analysis of the correlation coefficients and linear regression equations. Likewise, relationships between SO2 concentrations and air humidity were analyzed in different time intervals and presented both graphically and statistically, by computing correlations and regression equations. Irrespective of the source of emission and meteorological conditions, the SO2 concentration remained on a low level and did not exceed the permissible threshold either in the vicinity of Olsztyn or in the whole region of Warmia and Mazury.
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