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The Influence of Chemical Amelioration on the Structure of the Phosphate Fund of Retisol of Western Polissia in Ukraine

Polovyy Volodymyr, Yashchenko Liudmyla, Lopushniak Vasyl, Kolesnyk Tetiana

Ecological Engineering & Environmental Technology

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2023

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Vol. 24, iss. 5

100--110

EN

The study of changes in the structure of the phosphate fund of retisol after two rotations of a 4-field field crop rotation under the influence of the introduction of dolomite (CaMg(CO3)2) and limestone (CaCO3) flour in different doses before the start of the first rotation was carried out in the stationary experiment of the Institute of Agriculture of the Western Polissia of Ukraine. The dose of limestone materials is calculated on the basis of hydrolytic acidity (Hh) 2.80–2.97 mol/kg: for dolomite flour 0.5 Hh – 2.2 t/ha; 1.0 Hh – 4.7; 1.5 Hh – 6.7 t/ha; for limestone flour 1.0 Hh – 4.9 t/ha. The saturation of crop rotation with mineral fertilizers was N112Р87К105. The general background of the experiment was the annual application of the non-marketable part of the crop at a dose of 6.0 t/ha of biomass. The purpose of the work is to investigate the directionality of the transformation of the forms and different fractions of retisol phosphorus under the influence of liming against the background of systematic fertilization after the completion of the second crop rotation rotation. Research has established that under the influence of the introduction of meliorants, the share of mineral phosphorus compounds (P inorganic) fluctuated widely according to the experiment options (47.0 – 67.4% of P total), and organic – in the range of 28.5–37.5% P total. Liming against the background of fertilizer application also caused certain changes in the proportions between different forms of phosphorus. The main part (55.5–70.7%) of inorganic P is aluminum phosphates (Al-P) and iron phosphates (Fe-P). Liming with increasing doses of meliorants significantly (р = 0.05) affected the reduction of the total share of Al-P and Fe-P compared to the control and application of only mineral fertilizers, and also contributed to a significant increase in the share of Ca-P calcium phosphates (р = 0.01). At рНKCl 4.0–6.0, the content of P inorganic fractions was distributed in the order from maximum to minimum indicators: Al-P > Fe-P > Р soluble >Са-Р. Neutralization of the acidity of the soil solution also contributed to a significant increase in the contentof the soluble fraction of phosphorus (P soluble) to 4.9-5.4% of total P (р = 0.05), and the level of availability oflabile phosphorus compounds of the studied soil increased and was noted as high. The established features of thetransformation of the phosphate pool in retisol under the influence of the introduction of chemical ameliorantsindicate an increase in the share of bioavailable phosphorus compounds, significant changes in the conditions ofphosphorus nutrition of crop rotation crops and a change in the functional stability of the agroecosystem in general.

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Właściwości mechaniczne nanokompozytów

Jastrzębska M., Jurczak W.

Przetwórstwo Tworzyw

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2014

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[R.] 20, nr 1 (157)

28--33

PL

W pracy zastosowano 2 % wag. nanonapełniacza NanoBent® ZR2 do wytworzenia kompozytów o osnowie poliestrowej z recyklatem poliestrowo-szklanym oraz mączką dolomitową. Zbadano wytrzymałość na ściskanie oraz zginanie otrzymanych nanokompozytów w zależności od zawartości recyklatu oraz żywicy poliestrowej. Następnie sformułowano model materiałowy nanokompozytu. The influence on the mechanical properties of the components of the nanocomposite was calculated.

EN

In this work 2 wt. % of nanofiller NanoBent® ZR2 was used as polyester composites with glass reinforced polyester waste and dolomite dust. The compressive and flexural strengths of nanocomposites were tested, according to the content of recycled material and polyester resin. The material model of the nanocomposite was formulated. Evaluation of influence of components on mechanical properties of nanocomposite.

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Trendy rozwoju zapotrzebowania na surowce dla przemysłu szklarskiego w Polsce z oceną możliwości jego zaspokojenia z obecnych i perspektywicznych źródeł krajowych

Burkowicz A.

Górnictwo Odkrywkowe

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2013

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R. 54, nr 5-6

59--65

PL

Artykuł przedstawia trendy rozwoju zapotrzebowania na najważniejsze surowce szklarskie, tj. piaski kwarcowe, mączki wapienne i dolomitowe w latach 1990-2010, oraz ocenę możliwości jego zaspokojenia z istniejących źródeł krajowych, z uwzględnieniem perspektyw i szans zagospodarowania nowych złóż oraz powiększenia bazy zasobowej. Analizie poddano dotychczasowe trendy w funkcjonowaniu poszczególnych sektorów przemysłu szklarskiego, z uwzględnieniem zmian technologicznych, przedstawieniem głównych producentów i ich potencjału produkcyjnego oraz perspektyw rozwoju danych branż. Omówiono także krajowe źródła surowców szklarskich, ich dostępność pod względem wymagań jakościowych poszczególnych branż odbiorców oraz perspektywy rozwoju podaży w świetle przyszłego zapotrzebowania na te surowce.

EN

The paper presents trends in demand for the most important raw materials for glass industry such as: quartz sand, limestone and dolomite flour, upon the years 1990-2010, and the evaluation of opportunities to meet such demand from existing domestic sources, including prospects and possibilities for development of new deposits and enlargement of the resource base. The current trends in the functioning of the various sectors of the glass industry, including technological changes, presentation of the major producers, their production potential and prospects of development of the industry, were analyzed. The paper also presents the domestic sources of raw materials for glass industry, their accessibility in terms of quality required by individual industries customers and prospects for production development due to future demand for these materials.