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vol. 5, nr. 3 (2005)
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Soil aeration status and catalase activity
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Małgorzata Brzezińska1, Teresa Włodarczyk1, Witold Stępniewski2, Grażyna Przywara1
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1 Institute of Agrophysics, Polish Academy of Sciences, ul. Doświadczalna 4, 20-290 Lublin 27 |
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2 Faculty of Environmental Engineering, Technical University of Lublin, ul. Nadbystrzycka 40, 20-618 Lublin |
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vol. 5 (2005), nr. 3,
pp. 555-565
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abstract:
Soil catalase activity was determined as a function of soil aeration status of an Orthic Luvisol in a pot experiment. Soil was compacted to 1.2, 1.35 or 1.5 Mg m-3 bulk density and water content was maintained in the readily available range for plants (pF 2.2-2.9). Three levels of soil hypoxia were applied by raising soil water content to pF 1.3-1.7 and pF 0 (flooding). Soil aeration properties (air filled porosity – Eg; oxygen diffusion rate – ODR, redox potential – Eh; content of reduced iron [Fe+2]), as influenced by combined effects of water potential and com-paction level, showed significant interrelationships. Soil catalase activity was found to be depressed under hypoxic conditions by an average of 16% only. Among the properties tested, ODR and Eh best described the relationship between soil oxygen status and catalase activity.
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keywords:
soil aeration, catalase activity, soil hypoxia
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original in:
English
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