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Effect of nitrogen and potassium fertilisation on the content of ions in the soil solution

100%

Murawska B., Spychaj-Fabisiak E.

Journal of Elementology

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2009

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tom 14

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nr 4

The aim of the present research was to evaluate whether or not, and to what extent, exclusive mineral fertilisation affects the content of water-soluble ions determining the soil salinity. The soil was sampled from the arable layer of a multi-year field experiment carried out in 1974-2007. The research involved differentiated nitrogen fertilisation (factor I, n=3) and potassium fertilisation (factor II, n=4). The content of water-soluble ions was defined in water extract, in the soil to water ratio of 1:5; cations K+, Na+, Ca2+ were determined with the method of emission spectrometry and Mg2+ – with atomic absorption. Anions were analysed with the argentometric (Cl-) and nephelometric (SO4 2-) methods. In addition, electrolytic conductivity (R) was tested with the conductometric method, based on which the salt concentration in the solution (C) and the ionic strength (I) were calculated. The present results were statistically verified. The prolonged application of intensive nitrogen and potassium fertilisation (32 years) significantly differentiated the content of cations: K+, Na+, Ca2+ and Mg2+ as well as anions: Cl- and SO4 2- in soil solution. The contents of K+, Na+, Ca2+, Mg2+ in the soil solutions differed and fell within the range of (mean value) 0.136-0.507 (0.281) K+, 0.398-0.555 (0.472) Na+, 1-2.192 (1.350) Ca2+ and 0.211- 0.365 (0.272) Mg2+ mmol(+)⋅kg-1. The highest nitrogen dose significantly limited the concentration of SO4 2- in the soil solution, while the different doses of potassium did not result in such significant changes in the concentration of the above ions. The content of chlorine ions in the soil solution did not depend significantly on differentiated nitrogen and potassium fertilisation. No effect of the long-term mineral fertilisation on soil salinity was noted.

2

Determination of Fe3plus, Cu2plus, Zn2plus and Mn2plus ions content in some fruits of medicinal plants

100%

Sowa I., Blicharska E., Kocjan R.

Herba Polonica

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2003

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tom 49

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nr 3-4

In the Aroniae fructus, Rubi idaei fructus, Sambuca fructiis, Rosae fructus, Sorbí fruetus, Pyriis malus fructus, Foeniculi fructus, Pruni spinosae fructus and Myrtilli fructus, the contents of Fe3+, Cu2+, Zn2+ and Mn2+ ions were determined by the flame atomic absorption spectrometry (MS) and ion chromatography (IC). It was found that the quantities of the examined ions differ and vary in the investigated species. The amounts were: Fe3+ 20.99 - 1084.3 mg/kg; Cu2+ 2.44 - 13.58 mg/kg; Zn2+ 8.19 - 139.11 mg/kg and Mn2+ 4.88 - 217.32 mg/kg of dry mass.

3

Growth characteristic and ion contents of rice callus under the influence of NaCl and hydroxyproline

100%

Chauhan V., Prathapasenan G.

Acta Physiologiae Plantarum

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2000

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tom 22

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nr 1

4

The influence of electric currents on the growth of tomato plants

100%

Ward R. G.

Acta Physiologiae Plantarum

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1996

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tom 18

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nr 2

5

The effects of salt stress on growth and biochemical parameters in two maize varieties

84%

Sacala E., Demczuk A., Grzys E., Sobczak A.

Acta Societatis Botanicorum Poloniae

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2002

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tom 71

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nr 2

6

Microbial efficiency in a meromictic reservoir

67%

Mazurkiewicz-Boron G., Bednarz T., Wilk-Wozniak E.

Oceanological and Hydrobiological Studies

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2008

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tom 37

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nr 2

3-19

7

Inducing salt tolerance in maize [Zea mays L.] through seed priming with chloride salts: growth and ion transport at early growth stages

67%

Ashraf M., Rauf H.

Acta Physiologiae Plantarum

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2001

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tom 23

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nr 4

8

Relationship between Cognetia sphagnetorum Vejd. [Oligochaeta, Enchytraeidae] and soil microorganisms: a microcosm experiment

67%

Nowak E., Piotrowska-Seget Z.

Polish Journal of Ecology

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2005

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tom 53

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nr 2

Changes in densities of microorganisms were analysed in Cognetia sphagnetorum Vejd. cultures at normal and low numbers of microorganisms. Different abundance of microorganisms was achieved by using captan and oxytetracycline. During 14 weeks, the following variables were measured: total numbers of bacteria and fungi by plate method, the biomass of microorganisms by PLFA method, content of ions, and activity of acid and alkaline phosphatase and urease. Numbers of enchytraeids increased with numbers of fungi. The presence of animals reduced the activity of soil enzymes and the content of Cl, SO₄, Na, Ca, and Mg ions in soil leacheates. An increase in the content of N-NO₃ and N-NH₄ was not significant.

9

Wplyw weglanu wapnia, gipsu i fosfogipsu na plony oraz sklad chemiczny roslin i roztworu glebowego

43%

Sosulski T., Szara E., Labetowicz J.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2008

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tom 533

345-355

W doświadczeniu wazonowym przebadano wpływ węglanu wapnia, gipsu i fosfogipsu na plon i skład chemiczny roślin oraz pH i zawartość Ca²⁺, Mg²⁺, K⁺ w roztworze glebowym. Do badań została użyta gleba lekka, pochodząca z warstwy ornej niewapnowanego obiektu NPK, trwałego doświadczenia nawozowego prowadzonego w Wydziałowej Stacji Doświadczalnej SGGW w Skierniewicach. Roślinami testowymi były: gorczyca biała (Sinapis alba L.) oraz koniczyna czerwona (Trifolium pratense L.). Dawki wapnia w użytych substancjach wyliczono na podstawie 1,2 i 4 Hh. Największy przyrost plonów uzyskano stosując CaCO₃, natomiast użyte do nawożenia odpady na ogół zmniejszały plony uprawianych roślin. Węglan wapnia powodował wzrost zawartości Ca i Mg i spadek zawartości K w roślinach. Pobranie Ca, Mg i K przez rośliny było największe na obiektach z węglanem wapnia, mniejsze na obiektach z gipsem i najmniejsze na obiektach z fosfogipsem. Zastosowanie największych dawek odpadów było przyczyną zaburzenia gospodarki jonowej roślin w wyniku, którego dochodziło do rozszerzenia stosunku K : (Ca + Mg). Dominującym jonem roztworu glebowego gleby silnie kwaśnej był potas, deficytowym zaś magnez. Wapnowanie zwiększyło zawartość wapnia, a zmniejszyło zawartość magnezu w roztworze glebowym po zbiorze roślin. Na obiektach z gipsem i fosfogipsem zawartość wszystkich badanych jonów była wielokrotnie większa niż na obiektach wapnowanych (CaCO₃), a dominującym jonem był kation wapnia.

Ograniczanie wyników

Effect of nitrogen and potassium fertilisation on the content of ions in the soil solution

Determination of Fe3plus, Cu2plus, Zn2plus and Mn2plus ions content in some fruits of medicinal plants

Growth characteristic and ion contents of rice callus under the influence of NaCl and hydroxyproline

The influence of electric currents on the growth of tomato plants

The effects of salt stress on growth and biochemical parameters in two maize varieties

Microbial efficiency in a meromictic reservoir

Inducing salt tolerance in maize [Zea mays L.] through seed priming with chloride salts: growth and ion transport at early growth stages

Relationship between Cognetia sphagnetorum Vejd. [Oligochaeta, Enchytraeidae] and soil microorganisms: a microcosm experiment

Wplyw weglanu wapnia, gipsu i fosfogipsu na plony oraz sklad chemiczny roslin i roztworu glebowego