Autor: I.K. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Accumulation of potassium, magnesium, calcium in fresh and cold stored leaves of lettuce (lactuca sativa l.) after cacl2 foliar treatment before harvest
Akumulacja potasu, magnezu i wapnia w świeżych i przechowywanych w warunkach chłodniczych liściach sałaty (lactuca sativa l.) po dolistnym traktowaniu cacl2 przed zbiorem
Autorzy:: Perucka, I.
Olszowka, K.
Powiązania:: https://bibliotekanauki.pl/articles/15621.pdf
Data publikacji:: 2011
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: The aim of this study has been to determine the effect of foliar application of CaCl2 before harvest on the accumulation of K, Mg and Ca in fresh and stored lettuce heads. The experimental material comprised cv. Omega lettuce, which was grown in a greenhouse at the Department of Cultivation and Fertilization of Horticultural Plants of the University of Life Sciences in Lublin. CaCl2 solutions of the concentrations of 0.1 M and 0.2 M were sprayed over plants 20 and 10 days before harvest. After harvest, some plants were analysed immediately (fresh plants), while the remaining lettuce heads were cold-stored at 4oC for 7 and 14 days in dark polyethylene bags. The levels of dry matter, K, Mg and Ca were determined in whole leaves and leaf blades (without the midrib) of fresh and stored plants. The accumulation of dry matter, K, Mg and Ca varied depending on the leaf part, CaCl2 treatment and time of storage. The Ca content was lower leaf blades than in whole leaves of fresh plants not treated with CaCl2, but the K and Mg concentrations were on a similar level in both parts of leaves. The results of this study indicated that CaCl2 foliar spray of plants caused higher K and Mg concentrations in whole leaves compared to the control plants (no CaCl2 treatment) but decreasing Ca and K levels were observed in leaf blades without the midrib from fresh plants treated with 0.2 M CaCl2. During the 14-day cold storage of lettuce, the Ca and Mg levels in decreased whole leaves but increased in leaf blades of the control plants and after the 0.2 M CaCl2 treatment. Changes in the K, Mg and Ca accumulation affected the K:Mg and K:(Ca+Mg) ratios, which rose in whole leaves of stored plants compared to fresh ones.
Celem pracy było określenie wpływu dolistnego traktowania CaCl2 sałaty przed zbiorem na akumulację K, Mg i Ca w świeżych i przechowywanych główkach. Materiał badawczy stanowiła sałata odmiany Omega, uprawiana w szklarni Katedry Uprawy i Nawożenia Roślin Ogrodniczych Uniwersytetu Przyrodniczego w Lublinie. Na rośliny 20 i 10 dni przed zbiorem zastosowano roztwory CaCl2 o stężeniu 0,1 M i 0,2 M. Część roślin analizowano bezpośrednio po zbiorze (rośliny świeże), natomiast pozostałe przechowywano w temp. 4oC przez 7 i 14 dni w ciemnych foliach polietylenowych. Zawartość suchej masy, K, Mg, i Ca oznaczono w całych liściach i blaszkach liściowych (bez głównego nerwu liściowego) roślin świeżych i przechowywanych. Stwierdzono, że akumulacja suchej masy, K, Mg i Ca była zróżnicowana w zależności od części liścia, stosowania CaCl2 i okresu przechowywania. Zawartość Ca w blaszkach liściowych była mniejsza w świeżych roślinach nie traktowanych CaCl2 niż w całych liściach, natomiast zawartość K i Mg była podobna w obu częściach liści. Wykazano, że dolistne traktowanie roślin CaCl2 spowodowało zwiększenie koncentracji K i Mg w całych liściach w porównaniu z roślinami kontrolnymi (bez traktowania CaCl2) natomiast w blaszkach liściowych bez głównego nerwu liściowego zaobserwowano zmniejszenie zawartości Ca i K w świeżych roślinach traktowanych CaCl2 w stężeniu 0,2 M. Podczas 14 dni przechowywania sałaty w warunkach chłodniczych zawartość Ca i Mg w całych liściach zmalała, natomiast wzrosła w blaszkach liściowych roślin kontrolnych i po zastosowaniu CaCl2 w stężeniu 0,2 M. Zmiany w akumulacji K, Mg i Ca miały wpływ na stosunki K:Mg i K:(Ca+Mg). Zanotowano ich zwiększenie w całych liściach roślin przechowywanych w porównaniu ze świeżymi.
Źródło:: Journal of Elementology; 2011, 16, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Influence of foliar fertilisation with calcium fertilisers on the firmness and chemical composition of two highbush blueberry cultivars
Autorzy:: Ochmian, I.
Kozos, K.
Powiązania:: https://bibliotekanauki.pl/articles/15943.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Maintaining the high quality of fruits after harvest, which amongst other things is determined by firmness, is the aim producers strive after. Calcium, which fruits can be enriched with also in an extraradicular manner, is mostly responsible for the mechanical resistance of fruits. In the research conducted at the Laboratory of Orcharding, West Pomeranian University of Technology in Szczecin, the influence of foliar calcium fertilisers on the quality of fruits from two cultivars of highbush blueberry was studied. The firmness, size and chemical composition of fruits were examined (the content of mineral and organic compounds, especially polyphenols). At the fruit growth stage, bushes were sprayed 4 times with calcium solutions every 10 days, starting from the first decade of June. All fertilisers caused an increase in calcium concentrations in fruits (0.12-0.15 g 100 g-1), as compared with the control (0.09 g 100 g-1). The weight of 100 fruits collected from bushes sprayed with the Lebosol, Folanx and Calcinit fertilisers was the highest and it ranged from 327 to 365 g, and the Sunrise cultivar fruits were larger. The firmest (391 and 415 G mm) and the most resistant to mechanical damage (132 and 114 G mm) were the fruits sprayed with the calcium chloride and Folanx fertilisers, while fruits sprayed with Folanx and Calcinit were characterised by the highest polyphenol content (300 and 313 mg 100 g-1), and anthocyanins, among which delphinidin-3-galactoside predominated, constituted the largest group of compounds (77-80%). The Calcinit and Lebosol Calcium Forte fertilisers had the greatest influence on the change of chemical composition of the fruits, while the Folanx fertiliser had the greatest influence on the increase in fruit firmness. All calcium-based fertilisers decreased the acidity of fruits and, except for calcium chloride, they increased the nitrite level.
Źródło:: Journal of Elementology; 2015, 20, 1
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The use of Water Quality Indices (WQI and SAR) for multipurpose assessment of water in dam reservoirs
Autorzy:: Cymes, I.
Glińska-Lewczuk, K.
Powiązania:: https://bibliotekanauki.pl/articles/962796.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: The paper intends to show the potential of diverse benefits of two water quality indices used to assess 4 dammed lakes in lowland area in NE Poland: the Water Quality Index (WQI), developed by the Scottish Development Department, used in the assessment of water potential for human consumption, fisheries, industries and recreation, as well as the Sodium Adsorption Ratio (SAR), recommended by the Salinity Laboratory of the US Department of Agriculture, used in the water assessment for the irrigation purpose. Our study was based on the results of a water quality monitoring programme, in which the following water parameters have been analyzed: pH, dissolved oxygen, electrical conductivity, biological oxygen demand, chemical oxygen demand, NH4 +, NO3 -, Cl-, SO4 2-, Na+, Ca2+, Mg2+ and HCO3-. The water quality parameters differed among the studied reservoirs, and represented a medium (Wykrot) and poor class (Grodzisk Duży, Karwacz and Łoje) on a 5-degree WQI scale. The SAR was less diversified and water in the studied reservoirs showed class I. The results revealed that the water in all the reservoirs is suitable for irrigation with no hazard to the soil structure as well as for breeding of fish that tolerate lower water aeration. This water can be also used for recreational purposes, although direct contact with water is not recommended. The water quality indices (WQI and SAR) showed a great potential in the assessment of water for multi-purpose usage. The WQI and SAR are excellent tools for summarizing overall water quality conditions over space and time. When used together, they are also a method of providing relevant information for specific water use that can be more readable for planners and managers.
Źródło:: Journal of Elementology; 2016, 21, 4
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Assessment of the sea buckthorn growing in urban conditions – the quality of berries and leaves
Autorzy:: Nowakowska, M.
Ochmian, I.
Mijowska, K.
Powiązania:: https://bibliotekanauki.pl/articles/962859.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: The sea buckthorn is a plant valued for its berries, used by people and eaten by animals. It is grown in urban areas as an ornamental shrub with berries and leaves. The shrubs are characterised by their high resistance to drought, soil salinity or air pollution. The aim of the research carried out at the University of Technology in Szczecin, in Western Pomerania, was to check the influence of the city’s conditions on the quality of berries: mineral and chemical composition, as well as the content of L-ascorbic acid, nitrites and nitrates in shrubs growing along roads. The content of micro- and macronutrients as well as the colour and Green index of leaves were determined. Soils were characterised by similar and low salinity (0.31-0.41 g kg-1 NaCl). The content of various minerals in leaves varied depending on the test site and it was most often correlated with the soil content of these elements. Leaves collected from shrubs which grew next to a street contained more lead (1.06-1.27) but significantly less cadmium (0.08-0.11 mg kg-1) than berries collected in an orchard (Cd 0.17 and Pb 0.83 mg kg-1). The content of organic constituents in berries varied depending on the site of harvest. At the site beside the road, the study revealed a higher level of soluble solids (11.35%), L-ascorbic acid (2312 mg kg-1), organic acids (10.2 g kg-1) and nitrates (47 mg kg-1). All of the examined berries had a low level of nitrites (0.02-0.07 mg kg-1). It has been demontrated that leaves picked from the Hergo cultivar shrubs were darker (parameter L* - top 47.3), greener – especially at the top (parameter a* -13.1). They also had a higher Green index value than the leaves of shrubs growing beside the road (38.2). There is a high level (-0.81) correlation between the measured a* parameter CIE and Green index (SPAD), The sea buckthorn is perfect for urban areas. It is decorative, resistant to urban conditions and has valuable berries, which do not accumulate harmful constituents (heavy metals, nitrates, nitrites).
Źródło:: Journal of Elementology; 2017, 22, 2
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Does the addition of spices change the content of fluoride and antioxidants in black tea infusions?
Autorzy:: Janda, K.
Jakubczyk, K.
Wozniak, K.
Siwiec, E.
Wolska, J.
Gutowska, I.
Powiązania:: https://bibliotekanauki.pl/articles/14986.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: 6.

Tytuł:: Assessment of the sea buckthorn growing in urban conditions – the quality of berries and leaves
Autorzy:: Nowakowska, M.
Ochmian, I.
Mijowska, K.
Powiązania:: https://bibliotekanauki.pl/articles/1190137.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: ascorbic acid
colour
heavy metals
Green index
nitrates
nitrites
reflectance
Opis:: The sea buckthorn is a plant valued for its berries, used by people and eaten by animals. It is grown in urban areas as an ornamental shrub with berries and leaves. The shrubs are characterised by their high resistance to drought, soil salinity or air pollution. The aim of the research carried out at the University of Technology in Szczecin, in Western Pomerania, was to check the influence of the city’s conditions on the quality of berries: mineral and chemical composition, as well as the content of L-ascorbic acid, nitrites and nitrates in shrubs growing along roads. The content of micro- and macronutrients as well as the colour and Green index of leaves were determined. Soils were characterised by similar and low salinity (0.31-0.41 g kg-1 NaCl). The content of various minerals in leaves varied depending on the test site and it was most often correlated with the soil content of these elements. Leaves collected from shrubs which grew next to a street contained more lead (1.06-1.27) but significantly less cadmium (0.08-0.11 mg kg-1) than berries collected in an orchard (Cd 0.17 and Pb 0.83 mg kg-1). The content of organic constituents in berries varied depending on the site of harvest. At the site beside the road, the study revealed a higher level of soluble solids (11.35%), L-ascorbic acid (2312 mg kg-1), organic acids (10.2 g kg-1) and nitrates (47 mg kg-1). All of the examined berries had a low level of nitrites (0.02-0.07 mg kg-1). It has been demontrated that leaves picked from the Hergo cultivar shrubs were darker (parameter L* - top 47.3), greener – especially at the top (parameter a* -13.1). They also had a higher Green index value than the leaves of shrubs growing beside the road (38.2). There is a high level (-0.81) correlation between the measured a* parameter CIE and Green index (SPAD), The sea buckthorn is perfect for urban areas. It is decorative, resistant to urban conditions and has valuable berries, which do not accumulate harmful constituents (heavy metals, nitrates, nitrites).
Źródło:: Journal of Elementology; 2017, 22, 2; 399-409
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The influence of street conditions on sea buckthorn fruit quality and content of micro- and macronutrients in berries and in soil
Autorzy:: Nowakowska, M.
Ochmian, I.
Mijowska, K.
Powiązania:: https://bibliotekanauki.pl/articles/960075.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Sea buckthorn (Hippophaë rhamnoides L.) is grown in urbanized areas owing to its low habitat requirements, resistance to harsh urban conditions and spectacular appearance, especially in autumn and winter when the shrubs produce an abundance of orange berries. The climatic conditions of Szczecin are favourable for the cultivation of sea buckthorn, which can be encountered in various green areas and along streets of this city. Our aim was to identify the influence of street conditions on the content of macro- and micronutrients, also heavy metals, in soil and in berries and on the size and firmness of sea buckthorn fruits. The soils were characterized by similar low salinity (EC 0.31-0.41 mS cm-1).The content of various elements in the soil and berries varied depending on a test site. The soil along a street had a lower nutrient content (P 74.8-98.1; K 99.6-162.7; Mg 38.4-55.1 mg kg-1) than the orchard soil (P 123.3; K 284.7; Mg 72.7 mg kg-1). The heavy metal content in the tested soils (Cd 0.083-0.296; Pb 17.2-31.3 mg kg-1) was found to be much below the limits set in the relevant standards. The content of the tested elements in fruits was most often correlated with their soil content. Berries collected from shrubs which grew on a green strip separating roadway lanes contained much more lead (0.267- -0.383 mg kg-1 DM), but significantly less cadmium (0.032-0.035 mg kg-1 DM) than berries collected in the orchard (Pb 0.231; Cd 0.040 mg kg-1 DM). Regardless of the location where the shrubs grew, the cadmium and lead content fell within the limit range set by the relevant standards. Berries picked from non-varietal shrubs growing along the road were smaller (mass of 100 berries 39-45 g) than berries picked from the cv. Hergo shrubs cultivated in the orchard (mass of 100 berries - 57 g). The highest firmness and resistance to puncture were displayed by the smallest berries harvested along the road at research station 1 and cv. Hergo berries. The soils located along the busy street were not contaminated with heavy metals. Besides, in each case the content of heavy metals in sea buckthorn fruits was much lower than allowed by the standards.
Źródło:: Journal of Elementology; 2017, 22, 1
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Effect of silicon foliar application on the functional value of lawns
Autorzy:: Radkowski, A.
Radkowska, I.
Wolski, K.
Powiązania:: https://bibliotekanauki.pl/articles/13886.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:: Journal of Elementology; 2018, 23, 4
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Wplyw CaCl2 na zawartosc skladnikow mineralnych w lisciach salaty
Effect of CaCl2 on the content of mineral compounds in leaves of lettuce
Autorzy:: Perucka, I
Nurzynski, J.
Olszowka, K.
Powiązania:: https://bibliotekanauki.pl/articles/14980.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: salata
Lactuca sativa
liscie
skladniki mineralne
zawartosc skladnikow mineralnych
nawozenie dolistne
zawartosc magnezu
zawartosc wapnia
zawartosc potasu
zawartosc miedzi
zawartosc cynku
zawartosc zelaza
zawartosc manganu
nawozenie potasem
nawozenie doglebowe
magnez
cynk
wapn
potas
miedz
zelazo
mangan
Opis:: Badano wpływ stosowania CaCl2 na gromadzenie się bioskładników mineralnych: magnezu, wapnia, potasu, miedzi, cynku, żelaza i manganu w świeżych liściach sałaty. Rośliny opryskiwano zróżnicowanymi ilościami roztworu CaCl2 oraz stosowano doglebowo różne dawki jonów potasowych w formie K2SO4. Sałatę zebrano po 30 dniach od wysiewu. Wpływ badanych czynników na poziom bioskładników w sałacie był różny. Po zastosowaniu podstawowej dawki K2SO4 stwierdzono wzrost zawartości jonów wapnia i cynku pod wpływem jednokrotnego oprysku CaCl2 oraz spadek zawartości jonów miedzi pod wpływem dwukrotnego oprysku CaCl2 w stosunku do kontroli. Potraktowanie roślin jonami wapniowymi miało większy wpływ na zmiany zawartości składników mineralnych po zastosowaniu podwójnej dawki jonów potasu. W tym przypadku zaobserwowano wzrost zawartości jonów żelaza i manganu pod wpływem jonów wapniowych (jednokrotny i dwukrotny oprysk CaCl2 w stosunku do kontroli. W przypadku podwójnej dawki jonów potasu stwierdzono również spadek zawartości jonów wapniowych na skutek dwukrotnego oprysku CaCl2 w stosunku do kontroli. Nie stwierdzono wpływu jonów wapnia i potasu na zawartość jonów magnezu w liściach sałaty.
The influence of CaCl2 application on accumulation of minerał bio-compounds: magnesium, calcium, potassium, copper, zinc, iron and manganese, in fresh lettuce leaves was investigated. The experiments involved spraying plants with different doses of calcium ions and adding different doses of potassium ions to the soil. The lettuce plants were harvested 30 days after seedling. The effect of the test factors on the level of bio-compounds was varied. Increased content of calcium and zinc ions was found after the application of the basic dose of K2SO4 and single CaCl2 treatment whereas decreased content of copper ions occurred under the influence of double calcium chloride spray relative to the control. The CaCl2 treatment on plants had stronger influence on the change in the content of mineral bio-compounds if accompanied by a double dose of K2SO4. In this case the content of iron and manganese ions occurred under the influence of calcium ions (single and double CaCl2 treatments) compared with the control. Decreased content of Ca2+ ions was observed as a result of the double CaCl2 treatment compared with the control. No effect of Ca2+ and K+ leaves was noticed.
Źródło:: Journal of Elementology; 2007, 12, 3; 181-190
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Effect of fertilization on yield and quality of cultivar Kent strawberry fruit
Wplyw nawozenia na wysokosc i jakosc plonu truskawek odmiany Kent
Autorzy:: Chelpinski, P
Skupien, K.
Ochmian, I.
Powiązania:: https://bibliotekanauki.pl/articles/15762.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: plant cultivation
plant fertilization
fertilization effect
yield
quality
Kent cultivar
strawberry
fruit
chemical composition
Opis:: In an experiment carried out in 2006-2007, influence of different fertilizers on yield and quality of cv. Kent strawberry fruit was determined. Two combinations were tested, each consisting of 3 types of fertilizers. The control plants remained unfertilized. In both combinations, two types of multi-component fertilizers were used (T – 5% N, 5% P2O5, 15% K2O and O – 10% N, 5% P2O5, 10% K2O) as well as one rate of ammonium nitrate to provide 50 kg N ha–1 in the first combination and 70 kg N ha–1 in the second one. The usage of multi-component fertilizers, especially O type resulted in an increase of cv. Kent strawberry yield. The fruit collected from the control plants and the ones fertilized with ammonium nitrate weighed less than berries obtained from plants fertilized with multicomponent fertilizers. The treatment with multi-component fertilizers enhanced firmness as well as calcium, phosphorus and potassium content in fruit. The berries fertilized with higher rate of T fertilizer contained more soluble solids, total sugar and reducing sugar. Neither the type of fertilizers, nor their rate affected acidity, vitamin C, total phenol and magnesium content in berries. Higher antioxidant activity towards DPPH radicals was observed in fruit obtained from plants fertilized with lower and higher rate of ammonium nitrate. The lowest nitrogen content was observed for control berries. Practically, the differences regarding nitrogen content between the fruits of the first (50 kg N ha–1) and second combination (70 kg N ha–1) were negligible.
W doświadczeniu przeprowadzonym w latach 2006-2007 określano wpływ nawozów o zróżnicowanym składzie chemicznym na plonowanie oraz jakość owoców truskawki odmiany Kent. Na tle kontroli badano 2 warianty nawożenia mineralnego, z których każdy obejmował 3 kombinacje nawozowe. W obu wariantach zastosowano posypowo dwa rodzaje nawozów wieloskładnikowych (T – 5% N, 5% P2O5, 15% K2O oraz O – 10% N, 5% P2O5, 10% K2O) oraz jedną dawkę saletry amonowej w taki sposób, aby dostarczyć w 1. wariancie doświadczenia 50 kg N ha–1, a w 2. wariancie 70 kg N ha–1. Stosowanie nawozów wieloskładnikowych, zwłaszcza typu O, spowodowało wzrost plonowania truskawki odmiany Kent. Owoce z roślin kontrolnych oraz nawożonych saletrą miały mniejszą masę niż uzyskane z zastosowaniem nawozów wieloskładnikowych. Nawozy wieloskładnikowe wpłynęły na zwiększenie jędrności i zwiększenie koncentracji wapnia, fosforu i potasu w owocach. Owoce z roślin nawożonych wyższą dawką nawozu T odznaczały się większą zawartością ekstraktu, cukrów ogółem i cukrów redukujących. Nie stwierdzono istotnego wpływu zastosowanego nawożenia na kwasowość owoców, zawartość witaminy C, polifenoli ogółem i magnezu. Wyższą aktywnością przeciwutleniającą wobec rodników DPPH odznaczały się owoce pochodzące z roślin nawożonych niższą i wyższą dawką saletry amonowej. Najmniejszą zawartość azotu miały owoce kontrolne, natomiast różnice w zawartości azotu między owocami z wariantu 1. (50 kg N ha–1) i wariantu 2. (70 kg N ha–1) z praktycznego punktu widzenia nie były istotne.
Źródło:: Journal of Elementology; 2010, 15, 2; 251-257
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Potato tuber content of magnesium and calcium depending on weed control methods
Zawartość magnezu i wapnia w bulwach ziemniaka w zależności od zabiegów odchwaszczających
Autorzy:: Gugala, M.
Zarzecka, K.
Mystkowska, I.
Powiązania:: https://bibliotekanauki.pl/articles/16111.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Studies were conducted on samples of potato tubers harvested in a field experiment carried out at Zawady Experimental Farm of the University of Natural Sciences and Humanities in Siedlce in 2005-2007. The experimental design was a randomised complete block in a split-plot arrangement with 2 cultivars (Irga and Balbina) as main plots, and 4 weed control technologies (with the following herbicides: Plateen 41.5 WG, Racer 250 EC and Sencor 70 WG) as subplots. There was also a control plot with no chemical control of weeds. The purpose of the study was to determine magnesium and calcium content in the dry matter of edible potato tubers depending on weed control methods based on some herbicides. Magnesium and calcium content in the dry matter of potato tubers was determined by the AAS method. The content of the elements depended significantly on cultivars, weed control methods and weather conditions during the growing season. The herbicides Plateen 41.5 WG and Sencor 70 WG significantly increased the magnesium content in the dry matter of the tubers of potato whose cultivation included weed control based on Racer 250 EC and control potato (only mechanical weed control). The highest magnesium content was determined in the tubers of potato sprayed with Sencor 70 WG (metribuzin) – 1.032 g kg–1, on average. Moreover, the experimental herbicides increased the tuber contents of calcium compared with the control, by 0.016 g kg–1, on average. There were determined different magnesium and calcium contents in the experimental cultivars. Balbina accumulated more and Irga less magnesium and calcium, on average 1.138 and 0.575 g kg–1 as well as 0.890 and 0.510 g kg–1, respectively. Weather conditions in the study years significantly affected the potato tuber contents of magnesium and calcium.
Badania wykonano na próbach bulw ziemniaka pochodzących z doświadczenia polowego przeprowadzonego w latach 2005-2007 w Rolniczej Stacji Doświadczalnej Zawady, należącej do Uniwersytetu Przyrodniczo-Humanistycznego w Siedlcach. Eksperyment założono metodą losowanych podbloków. Czynnikami eksperymentu były: 2 odmiany ziemniaka jadalnego – Irga, Balbina i 4 sposoby pielęgnacji z uwzględnieniem herbicydów: Plateen 41,5 WG, Racer 250 EC, Sencor 70 WG oraz obiekt kontrolny bez ochrony chemicznej. Celem badań było określenie zawartości magnezu i wapnia w suchej masie bulw ziemniaka jadalnego w zależności od zabiegów odchwaszczających z uwzględnieniem niektórych herbicydów. Zawartość magnezu i wapnia w suchej masie bulw ziemniaka oznaczono metodą ASA. Zawartość pierwiastków zależała istotnie od odmian, sposobów zwalczania chwastów i warunków pogodowych w okresie wegetacji. Herbicydy Plateen 41,5 WG i Sencor 70 WG wpływały istotnie na zwiększenie koncentracji magnezu w suchej masie bulw ziemniaka w odniesieniu do pielęgnacji z użyciem preparatu Racer 250 EC i obiektu kontrolnego (pielęgnacji mechanicznej). Największą zawartość tego makroskładnika stwierdzono w bulwach ziemniaka opryskiwanych herbicydem Sencor 70 WG (metribuzin) – średnio 1,032 g kg–1. Ponadto stosowane w doświadczeniu herbicydy wpływały na zwiększenie koncentracji wapnia w odniesieniu do obiektu kontrolnego, przeciętnie o 0,016 g kg–1. Badane odmiany różniły się istotnie pod względem zawartości magnezu i wapnia, i więcej tych składników gromadzi ły bulwy odmiany Balbina – odpowiednio 1.138 g kg–1 i 0,575 g kg–1, a mniej odmiany Irga – średnio 0,890 g kg–1 i 0,510 g kg–1. Warunki pogodowe w latach badań istotnie różnicowały zawartość magnezu i wapnia w bulwach ziemniaka.
Źródło:: Journal of Elementology; 2012, 17, 2
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Changes in macro- and microelements in freshwater fish during food processing
Autorzy:: Cieślik, I.
Migdał, W.
Topolska, K.
Gambuś, F.
Szczurowska, K.
Cieślik, E.
Powiązania:: https://bibliotekanauki.pl/articles/1189834.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: freshwater fish
smoking
marinating
macroelements
microelements
Opis:: Fish meat is a valuable dietary component owing its exceptionally high nutritional value, as it contains high quality protein, fat (including n-3 acids) and a variety of vitamins and minerals. The aim of this study was to determine the content of ash and minerals (macro- and microelements) in three freshwater fish species, and quantitative changes in smoked and marinated products. The research material originated from three species, i.e. common carp (Cyprinus carpio), rainbow trout (Oncorhynchus mykkis) and northern pike (Esox lucius). The following parameters were determined in samples of raw as well as processed fish meat: ash (using the gravimetric method, according to PN-ISO 936:2000) and the minerals Na, K, Ca, Mg, P, Fe, Zn, Mn, Cu (using inductively coupled plasma optical emission spectrometry ICP-OES). The statistical analysis of the results did not show significant differences in the ash content in meat of the three fish species. The ash content in processed fish meat differed significantly from that in raw fish, thus indicating changes in concentrations of the minerals. The differences depended on the applied processing technology. As for the mineral content, the examined fish species achieved high nutritional quality, with the highest content of magnesium, iron and zinc in common carp, potassium and phosphorus in rainbow trout and calcium in pike. The levels of the minerals in processed fish meat differed significantly from those in the raw material, especially in carp products (higher amounts of almost all the determined elements). Smoking as well as marinating resulted in a considerable increase in the sodium contet, and the highest values were obtained for marinated rainbow trout. Monitoring the content of macro- and microelements in fish meat is important for the consumer.
Źródło:: Journal of Elementology; 2017, 22, 2; 453-462
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Effect of foliar fertilization with magnesium sulfate and supplemental L-ascorbic acid on dry matter yield and chemical composition of cv. Egida timothy grass
Autorzy:: Radkowski, A.
Radkowska, I.
Rapacz, M.
Wolski, K.
Powiązania:: https://bibliotekanauki.pl/articles/963868.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: In 2011-2013, a field experiment was conducted at the Plant Breeding Station in Polanowice near Krakow (220 m above sea level), on degraded Chernozem developed from loess. The field experiment was set up in a randomized block design with three replications. The experimental material used in this study was cv. Egida timothy grass. The aim of the study has been to test whether L-ascorbic acid supplementing for foliar fertilization with magnesium sulfate enhances magnesium absorption by plants and what effects it has on yielding and dry matter composition of timothy grass cut and used as forage. Three levels of L-ascorbic acid fertilization were applied (10, 20 and 30 g ha-1) with and without magnesium sulfate 7-hydrate. The plants were sprayed until wet, using 300 dm3 liquid per hectare. Spraying was performed 6-8 days from the onset of growth for the first harvest, and a week after cutting for the other harvests. Statistically significant improvement in yielding and forage quality was observed for the combined magnesium/ascorbic acid fertilization. Fertilization with these two nutrients caused an increase in the total dry matter yield of timothy grass cv. Egida (together from 3 cuts), with differences reaching as much as 26% depending on the year (in the variant of combined magnesium sulfate and ascorbic acid application at 30 g ha-1). Another benefit of ascorbate application was an increase in forage quality (the content of crude protein, crude fat, water soluble carbohydrates and macronutrients). Best effects in terms of yielding and forage quality were obtained after a combined application of magnesium sulfate and ascorbic acid (30 g ha-1). Combined fertilization with magnesium sulfate and ascorbic acid tended to produce a stronger effect after periods of dry weather, which is discussed in the study.
Źródło:: Journal of Elementology; 2017, 22, 2
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Effect of foliar fertilization with magnesium sulfate and supplemental L-ascorbic acid on dry matter yield and chemical composition of cv. Egida timothy grass
Autorzy:: Radkowski, A.
Radkowska, I.
Rapacz, M.
Wolski, K.
Powiązania:: https://bibliotekanauki.pl/articles/1190180.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: timothy grass
yield
L-ascorbic acid
magnesium sulfate
forage quality
Opis:: In 2011-2013, a field experiment was conducted at the Plant Breeding Station in Polanowice near Krakow (220 m above sea level), on degraded Chernozem developed from loess. The field experiment was set up in a randomized block design with three replications. The experimental material used in this study was cv. Egida timothy grass. The aim of the study has been to test whether L-ascorbic acid supplementing for foliar fertilization with magnesium sulfate enhances magnesium absorption by plants and what effects it has on yielding and dry matter composition of timothy grass cut and used as forage. Three levels of L-ascorbic acid fertilization were applied (10, 20 and 30 g ha-1) with and without magnesium sulfate 7-hydrate. The plants were sprayed until wet, using 300 dm3 liquid per hectare. Spraying was performed 6-8 days from the onset of growth for the first harvest, and a week after cutting for the other harvests. Statistically significant improvement in yielding and forage quality was observed for the combined magnesium/ ascorbic acid fertilization. Fertilization with these two nutrients caused an increase in the total dry matter yield of timothy grass cv. Egida (together from 3 cuts), with differences reaching as much as 26% depending on the year (in the variant of combined magnesium sulfate and ascorbic acid application at 30 g ha-1). Another benefit of ascorbate application was an increase in forage quality (the content of crude protein, crude fat, water soluble carbohydrates and macronutrients). Best effects in terms of yielding and forage quality were obtained after a combined application of magnesium sulfate and ascorbic acid (30 g ha-1). Combined fertilization with magnesium sulfate and ascorbic acid tended to produce a stronger effect after periods of dry weather, which is discussed in the study.
Źródło:: Journal of Elementology; 2017, 22, 2; 545-558
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Content and uptake of selected macroelements with the yield of potato tubers depending on herbicides and biostimulants
Autorzy:: Zarzecka, K.
Mystkowska, I.
Gugala, M.
Dolega, H.
Powiązania:: https://bibliotekanauki.pl/articles/14841.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:: Journal of Elementology; 2019, 24, 1
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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