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Microbiological and biochemical properties of soil depending on adenine and azotobacterin applied

100%

Wyszkowska J., Kucharski M., Kucharski J.

Journal of Elementology

2008

tom 13

nr 1

The aim of the study was to determine how adenine affected biological proprieties of soil. The performance of this precursor cytokinine was tested in a pot trial. The question posed was whether it was possible to improve efficacy of adenine by enlarging populations of bacteria from Azotobacter species in soil. The experiment was carried out on proper brown soil, formed from dust clay sand with pHKCl 6,9. Pots were filled with 3.2 kg of soil. The investigations were performed in two series: with and without addition Azotobacterin to soil. Tow rates of nitrogen fertilisation: 0 and 50 mg N·kg-1 of soil were applied in test. Adenine was applied in the following quantities: 0; 5; 10 and 15 mg·kg-1 of soil. Radish, 6 plants per pot, was the test plant. It was confirmed that the adenine had a significant effect on growth and development of radish. It positively affected microbiological and the biochemical proprieties of soil. The counts of total oligotrophic bacteria, oligotrophic sporulation bacteria, total copiotrophic bacteria, copiotrophic sporulation bacteria, ammonifying bacteria, immobilizing bacteria, celulolytic bacteria, Azotobacter sp., Artrobacter sp. and Pseudomonas sp. were increased, and the number of fungi diminished. Adenine also stimulated activities of dehydrogenase, urease and alkaline phosphatase, although it depressed the activity of acid phosphatase. The inoculation with bacteria from Azotobacter species applied to soil failed to improve efficacy of adenine. Nevertheless, it increased counts of these bacteria, which had a beneficial influence on the development of oligotrophic bacteria, immobilizing bacteria, celulolytic bacteria and actinomyces, while negatively affecting fungi, ammonifying bacteria and Arthrobacter.

Ograniczanie wyników

1 Journal of Elementology

1 Kucharski J.

1 Kucharski M.

1 Wyszkowska J.

1 2008

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Microbiological and biochemical properties of soil depending on adenine and azotobacterin applied