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vol. 8, nr. 3 (2006)
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Influence of agricultural production system on organic substance and enzymatic activity of asparginase and urease in orthic luvisol
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Maria Flis-Bujak1, Małgorzata Dąbek-Szreniawska2, Grażyna Żukowska1
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1 Insitute of Soil Science and Environmental Management, Agricultural University, ul. Leszczyńskiego 7, 20-069 Lublin |
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2 Insitute of Agrophysics, Polish Academy of Science, ul. Doświadczalna 4, 20-290 Lublin |
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vol. 8 (2006), nr. 3,
pp. 559-568
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abstract:
In this paper three systems of plant production and their effect on organic substance and activity of enzymes taking part in nitrous substance transformations (asparaginase, urease) were investigated. Materials to be analysed were sampled form an 11-year field experiment, form 0-20 cm layer of soil on which winter wheat was cultivated in: monoculture, ecological and conventional system. Basing on the obtained results, it was found that evaluated plant production systems had diverse effect on organic substance and activity of analysed enzymes. In soil under wheat monoculture, decrease tendency for C organic and N total, as well as decrease of stable forms of organic substances (humins) was noted. In ecological system of production, decrease of free and lightly bonded with R2O3 factions of organic compounds was observed. Greater urease activity was noted in soil cultivated in the conventional system, and that of asparaginase – in the ecological one.
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keywords:
plant production system – ecological, conventional, monoculture, organic substance, asparaginase and urease enzymatic activity
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original in:
Polish
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