Browsing by Author "Banach-Szott, Magdalena"

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    Effect of fertilization with nitrogen and microelements on the content of total organic carbon and dissolved organic carbon in Luvisols
    (Instytut Uprawy Nawożenia i Gleboznawstwa - Państwowy Instytut Badawczy w Puławach, 2024) Banach-Szott, Magdalena; Dębska, Bożena; Siennicki, Michał; Knapowski, Tomasz; Wasilewski, Piotr
    The aim of the paper has been to investigate the effect of fertilization with nitrogen and microelements (Se and Cu, Mn, Zn) on the content of carbon (TOC) and nitrogen as well as dissolved organic carbon (DOC). The study was performed based on the soil sampled (Albic Luvisol) from a two-factor field experiment: the first factor was nitrogen fertilization (0, 40 and 80 kg ha-1), the second one – variants of foliar and soil application of microelements and selenium. Soil was sampled from a depth of 0–30 cm at the beginning and the end of the growing season. Sampling 1 was after the start of spring vegetation, sampling 2 – after harvesting the crop from the field. Winter spelt (cv. Rokosz) was grown on the experimental plots, with winter rapeseed as the forecrop. In the soil samples the following were assayed: total organic carbon (TOC), total nitrogen (TN) with the Vario Max CNS analyser provided by Elementar and dissolved organic carbon (DOC). DOC was extracted with 0.004 M CaCl2 and was assayed and using the Multi N/C 3100 Analityk Jena analyser. In the soil samples analysed TOC, irrespective of the sampling date and the microelements application method, ranged from 8.38 to 10.60 g kg-1. In general, the application of microelements into soil in combination with selenium resulted in an increase in TOC in the soil sampled at the end of the vegetation period as compared with the soil sampled at the beginning of it. Irrespective of the application method, there has been identified no effect of fertilization with nitrogen and microelements on total nitrogen and dissolved organic carbon in soil, which is important in terms of the stability and equilibrium of the soil system investigated.
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    The Significance of Herbicide–Humin Interactions in Sustainable Agroecosystems
    (MDPI, 2025) Jerzykiewicz, Maria; Ćwieląg-Piasecka, Irmina; Weber, Jerzy; Ukalska-Jaruga, Aleksandra; Jamroz, Elżbieta; Kocowicz, Andrzej; Dębicka, Magdalena; Bekier, Jakub; Mielnik, Lilla; Bejger, Romualda; Banach-Szott, Magdalena; Grabusiewicz, Agnieszka
    Humin, as the most stable fraction in soil organic matter, determines possibility of sustainable environmental development by influencing, among other things, the binding and migration of different chemicals in soil. The aim of this paper was to determine changes in the properties of humins after interaction with three selected active substances of herbicides differing in structure and chemical properties (pendimethalin, metazachlor, and flufenacet) and two different commercial products. In accordance with OECD 106 guidelines, humins isolated from eight different soils were saturated with herbicide compounds under study. As humin is a non-hydrolyzable organic carbon fraction, solid state research techniques (elemental analysis, NMR, FTIR, EPR, and UV-Vis) were applied. The results clearly showed that the interaction between humin and herbicides increases the concentration of oxygen-containing groups and the internal oxidation (ω) in humin. For all investigated humins, a reduction in radical concentration was observed. Radicals in humins were not completely quenched; a certain concentration of radicals with unchanged structure always remained in the samples. Other spectroscopic analyses showed no significant changes in the structure of pesticide-saturated and non-saturated humins. This suggests that sorption of the studied compounds occurs on the humins only as a result of the interaction of physical forces on the surface of the studied organic matter fraction. Thus, interaction with the studied herbicides occurs as a surface phenomenon, and the inner core remains protected by the condensed structure and/or strong binding to the clay minerals.