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vol. 10, nr. 3 (2007)
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Effect of pH and zinc on surface area of rye (Secale cereale L.) roots as determined from nitrogen adsorption-desorption data
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Alicja Szatanik-Kloc, Grzegorz Bowanko
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Institute of Agrophysics, Polish Academy of Sciences, ul. Doświadczalna 4, 20-290 Lublin |
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vol. 10 (2007), nr. 3,
pp. 705-713
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abstract:
Winter rye (Secale cereale L.) – varietiety Rostockie was studied. The plants were grown in nutrient solution at pH = 7 and after reaching shooting stage the pH of the solution was adjusted to pH = 4.5 and various zinc (ZnCl2) amounts (from 0 to 400 mg Zn kg-1) were added. Nitrogen adsorption-desorption isotherms were measured at 78K using Sorptomatic 1990 made by Fisons. At higher concentrations of Zn+2 (200 and 400 mg dm-3) the root surface area increased and average adsorption energy decreased, as compared with the roots grown without zinc addition 20 mg dm-3 Zn+2 did not induce significant changes in root surface properties.
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keywords:
adsorption energy, nitrogen, pH, roots, surface area, zinc
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original in:
Polish
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