Growth and accumulation of N, K+, Ca2+ and Mg2+ in barley exposed to various nutrient regimes and root/shoot temperatures

Jensen, Poul Henning; Perby, Harald

doi:10.1111/j.1399-3054.1986.tb02438.x

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Fresh weight and dry weight (70~ for 72 h) of shoots and roots were determined. Total nitrogen content was determined by the Kjeldahl technique (Tecator Kjeltec 1003) modified for efficient reduction of nitrate (Jensrn and Perby, 1986). 15N-analysis was made by a mass spectrometric technique (Muhammed and Kumazawa, 1974).…”

Section: ~Sn Uptakementioning

confidence: 99%

Uptake and transport of N, P and K in tomato supplied with nettle water and nutrient solution

Peterson

Jensen

1988

Plant Soil

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Water extract of stinging nettle (Urtica dioica) has a growth stimulating effect on plants. This investigation elucidated effects of nettle water on uptake and transport of N, P and K. Tomato plants (Solanum lycopersicum L. cv. Dansk export) were grown in sand culture 6-8 weeks. Plants were supplied with nettle water, and nutrient solution was used as a control medium. Uptake and transport of N, P and K § were determined with isotopes (~SN, 32p and 86Rb+ as a tracer for K § ) and ion-selective electrodes and in exudation experiments.A 15% higher uptake of nitrogen (15N assay) was found after nettle water treatment compared with the nutrient solution control. The total amount of nitrogen was also higher in plants cultivated with nettle water. Transport of inorganic and organic nitrogen, measured in exudation experiments, was more than 50% higher for plants supplied with nettle water compared with plants supplied with nutrient solution. In contrast, nettle water had no effect on uptake, transport or total amount of phosphorus and potassium in the plants.Experiments in hydroculture showed that nettle water had a strong pH-elevating effect. Uptake of NH~-was strongly stimulated by nettle water compared with nutrient solution. By holding pH at a constant level during the uptake period for 6 h, the uptake of NH~ from nettle water was significantly lower when no adjustment of pH was made. Consequently a good deal of the NH~ uptake enhancement by nettle water could be explained by pH-stimulation. Assays with the uncoupler/inhibitor 2,4-dinitrophenol (DNP) and dichlorophenyl-dimethyl-urea (DCMU) showed that uptake of nitrogen from nettle water was less metabolically-linked than uptake from a corresponding nutrient solution. All together, nettle water seems to stimulate the uptake of nitrogen, but not phosphorus or potassium.

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Section: ~Sn Uptakementioning

confidence: 99%

Uptake and transport of N, P and K in tomato supplied with nettle water and nutrient solution

Peterson

Jensen

1988

Plant Soil

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“…In case of insufficient contents of magnesium in soil plants may transport this nutrient through the phloem to their actively growing, juvenile parts [1], which may result in the appearance of characteristic symptoms of magnesium interveinal chlorosis. Additional environmental factors affecting the potential occurrence of symptoms of magnesium deficit in plants include drought or irregular water availability [5,6], low temperature [7,8] or low pH of soil [9][10][11].…”

mentioning

confidence: 99%

Effect of Magnesium Nutrition of Onion (Allium cepa L.). Part I. Yielding and Nutrient Status

Kleiber¹,

Golcz²,

Krzesiński³

2012

Ecological Chemistry and Engineering S

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Magnesium (Mg) serves specific physiological functions in plants, as it participates in 250÷400 processes and may not be replaced by other elements, even those exhibiting similar physicochemical properties, such as Co 2+ , Mn 2+ or Ni 2+ . The aim of the conducted studies was to optimize magnesium nutrition of onion (Allium cepa L.), through the evaluation of yielding of plants, and to determine its effect on contents of the following elements in leaves and bulbs: nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg). Magnesium was applied in the quick-acting form, MgSO4·7H2O, based on the chemical analyses of soil, in doses corresponding to 50, 100, 150 and 200 mg Mg·dm -3 soil. The other nutrients were supplemented to standard levels recommended for the cultivation of onion, amounting to (in mg·dm -3 soil) 150 N, 80 P and 200 K. Magnesium nutrition was found to have a positive effect on yielding of onion and its quality. Significantly the highest total yield (4.85 kg·m -2 ) and merchantable yield (4.78 kg·m -2 ) were obtained when applying Mg-100, which amounted to an increase by 38% and 45% in comparison with the control combination. Plant nutrition with magnesium in case of leaves significantly affected an improvement of their nutrient status for nitrogen, deterioration of calcium nutrition, while in case of leaves and bulbs that of potassium. Analyzed levels of magnesium nutrition had a significant effect on nutrient status of leaves and bulbs for this nutrient. Leaves accumulated more nitrogen, potassium, calcium and magnesium than bulbs. Controlled magnesium nutrition of plants is an effective method of biofortification of onion with this nutrient.

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Simultaneous Study of NH+4, Na+, Mg2+, Ca2+, NO2-3, SO2-4, (NO-2), H{2in}PO-4 and CI- Uptake by Intact Winter Wheat Seedlings in a Single Depletion ExperimentPO-<s

Matejovič¹

1991

Biol. plant.

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Simultaneous uptake of NH~, Na +, Mg 2+, Ca 2+, NO~, SO 2-, (NOi), H2PO~ and C1-ions by N-limited winter wheat seedlings (Triticum aestivum L., cv. Regina) in a single depletion experiment was investigated. Individual ion species in uptake solution samples were determined using capillary isotachophoresis. The operating systems used are described in detail. Processing of obtained concentration data allow to construct time curves of individual ions concentration in uptake solution, time curves of accumulative uptake, and curves for uptake rate versus time and uptake rate versus external concentration. From these curves there is possible to reveal a more complex picture of behaviour ofindividua! ions during uptake process as well as to assess interactions among them. Attention was paid to the points of intersection of time curves of NO~ and NH~ uptake rates. These points characterized by equal uptake rates may be considered as limits for preference of given ion species under given experimental conditions.

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Growth and accumulation of N, K⁺, Ca²⁺ and Mg²⁺ in barley exposed to various nutrient regimes and root/shoot temperatures

Cited by 7 publications

References 25 publications

Uptake and transport of N, P and K in tomato supplied with nettle water and nutrient solution

Uptake and transport of N, P and K in tomato supplied with nettle water and nutrient solution

Effect of Magnesium Nutrition of Onion (Allium cepa L.). Part I. Yielding and Nutrient Status

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