Autor: Niemiec, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Evaluation of the chemical composition of raw common duckweed (Lemna minor L.) and pulp after methane fermentation
Autorzy:: Sikora, J.
Niemiec, M.
Szelag-Sikora, A.
Powiązania:: https://bibliotekanauki.pl/articles/16155.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:: Journal of Elementology; 2018, 23, 2
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Assessment of the content of magnesium, potassium, phosphorus and calcium in water and algae from the Black Sea in selected bays near Sevastopol
Autorzy:: Szelag-Sikora, A.
Niemiec, M.
Sikora, J.
Powiązania:: https://bibliotekanauki.pl/articles/15630.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: The content of macroelements such as magnesium, calcium or phosphorus in tissues of aquatic organisms is often used as an indicator of the quality of an aquatic environment. The aim of this paper was to assess the content of magnesium, potassium, calcium and phosphorus in water and in algae in selected bays of the Black Sea near Sevastopol. The samples of water and algae were collected in August 2012 from eight bays of Sevastopol (Gałubaja, Kozacha, Kamyshova, Strieletska, Kruhla, Pishchana, Pivdenna, Sevastopol Bay). One sample was obtained from the open sea near Fiolent. Cystoseira barbata and Ulva rigida algae were collected from the same sites. The collected water was conserved in situ and, after being brought to a laboratory, it underwent determinations of the content of magnesium, potassium, phosphorus and calcium. Laboratory samples of the algae were subjected to mineralization in a closed system with the use of microwave energy. The content of the elements in water and in digested algae samples was determined using the ICP-OES method. The magnesium content in water ranged between 461.6 and 638.9 mg Mg ∙ dm-3, potassium between 332.8 and 457.6 mg K ∙ dm-3, phosphorus 0.072-0.143 mg P ∙ dm-3, and the calcium content was within the range from 209.5 to 288.6 mg Ca ∙ dm-3. A higher content of calcium and phosphorus was found in Cystoseira barbata, whereas a higher level of magnesium was detected in Ulva rigida algae. No statistically significant correlation between the content of the elements in water and in algae was observed. The content of the elements in water decreased in the order Mg>K>Ca>P, whereas in algae the order was K>Ca>Mg>P. Despite the differences in amounts of the accumulated elements in algae, there was a significant relation between the content of individual elements in Cystoseira barbata and Ulva rigida, which suggests that both species of algae are suitable for biomonitoring.
Źródło:: Journal of Elementology; 2016, 21, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Content of Ba, B, Sr and As in water and fish larvae of the genus Atherinidae L. sampled in three bays in the Sevastopol coastal area
Autorzy:: Niemiec, M.
Komorowska, M.
Szelag-Sikora, A.
Sikora, J.
Kuzminova, N.
Powiązania:: https://bibliotekanauki.pl/articles/14285.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:: Journal of Elementology; 2018, 23, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Assessment of lead and chromium pollution in the ecosystem of the Dunajec River based on bioindicative methods
Autorzy:: Niemiec, M.
Szelag-Sikora, A.
Sikora, J.
Cupial, M.
Komorowska, M.
Powiązania:: https://bibliotekanauki.pl/articles/15568.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:: Journal of Elementology; 2018, 23, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Effect of nitrogen fertilization on yield of grapes and fertilization efficiency in Gissar Valley of the Republic of Tajikistan
Autorzy:: Niemiec, M.
Chowaniak, M.
Zuzek, D.
Komorowska, M.
Saidali Mamurovich, G.
Kodirov Gafurovich, K.
Usmanov, N.
Kamilova, D.
Rahmonova, J.
Rashidov, N.
Powiązania:: https://bibliotekanauki.pl/articles/1192816.pdf
Data publikacji:: 2021
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: nitrogen
fertilization
grape
yield
quality
Opis:: The issue of optimizing plant fertilization is important in quality systems, such as Integrated Plant Production, GLOBAL G.A.P., or SAI. Effective implementation of these systems depends on the use of a plant nutrition technology based on plants’ nutrient demand. In developing countries, low efficiency production technologies are used very frequently, and a significant level of anthropogenic pressure is therefore observable. The objective of this research was to assess grapevine fertilization efficiency according to particular nitrogen fertilization strategies. Within the scope of the research, a two-factor field experiment was conducted in a commercial vineyard located in Gissar Valley, the Republic of Tajikistan, in 2018. The experiment was established on sandy soils and involved the following factors: the overall quantity of mineral nitrogen used, and the number of fertilizer application cycles (one or three). The designed systems were assessed on the basis of commercial yield, productivity ratio, agronomic efficiency ratio, removal efficiency ratio, and physiological efficiency ratio. The findings obtained from the field experiment indicate that the plant yield was the highest, at 24.85 Mg ha-1, in the conventionally fertilized object, with the nitrogen dosage of 250 kg N ha-1. Similar yield was obtained when the amount of nitrogen was divided into 3 doses. In this variant, the values of ratios representing fertilization efficiency, such as the agronomic efficiency ratio, removal ratio and productivity ratio, were the most beneficial as well. No significant variations were determined in respect of the physiological efficiency ratio value, which may be an indication that no factors occurred in any of the variants which would distort the plants’ growth and development. Optimizing fertilization is an important aspect that defines the quality and safety of products of agricultural origin, especially in developing countries.
Źródło:: Journal of Elementology; 2021, 26, 1; 19-31
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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