Aktywność enzymatyczna wybranych gleb leśnych Polski południowej w świetle badań polowych i laboratoryjnych

Kazimierz Januszek

Abstract

The objective of this study was to investigate the following: - enzyme activity in some forest soil profiles with the aim of elaborating, if possible, biological indices of soil fertility, - enzyme activity in rhizosphere and non-rhizosphere soils of some forest tree species, - enzyme activity in poor forest soils under various industrial emissions, - effect of simulated acid rain on soil enzyme activity, - effects of freezing and thawing of a soil on its enzyme activity. The following enzymes, playing a fundamental role in the transformation of carbon compounds: dehydrogenases, cellulases and invertase; nitrogen compounds: proteases and urease; and phosphorus compounds: phosphatascs, were considered. The research tasks were performed based on all or some of the enzymes, according to the aim of study and the number of samples. In laboratory studies on the effect of simulated acid rain on soil enzyme activity, soil respiration was also investigated. It was found that dehydrogenase, urease and protease activities expressed in terms of soil volume in a profile of 1 dm2 x 1m fully reflected the fertility of forest soils of southern Poland. To estimate this fertility, the following enzyme soil index was proposed: EIGDPU w 0,01 • ADh + AP + AU, where: ADh dehydrogenase activity in mg TPF/1 dent of soil/24 h, AP -protease activity in g N-NH2/1 dm2 of soil/20 h, and AU - urease activity in g N-NH4I1 dm2 of soil/24 h. Phosphatase and invertase activities did not reflect properly the fertility of the investigated forest soils of southern Poland. Among the studied dehydrogenase, phosphatase and protease activities in rhizosphere and non-rhizosphere soils of Scotch pine (Pinus sylvestris L.) and grey alder (Alnus incana (L.) Muench) on the formerly arable land, and common fir (Abies alba Mill.) in climax associations, the ratio of phosphatase activity in a rhizosphere soil to its activity in a non-rhizosphere soil had the highest values: 2.9, 1.9 and 1.5, respectively. This is indicative of a high phosphurolytic potential of the rhizosphere of the investigated tree species. In a forest sand soil polluted to a various degree (industrial damage zone 0, II and III), mostly by zinc and lead, significant differences were found in dehydrogenase activities, while no differences were observed in invertase, phosphatase and urease activities. Zinc influenced enzyme activities more harmfully than lead. The results of the investigations carried out in zone II of industrial damage shown a significant effect of the tree species on phosphatase and invertase activities, but not on those of dehydrogenase and urease. The effect of simulated acid rain on the activity of the investigated enzymes depended on the specific properties of the enzyme, the properties of soil and the pH of acid rain. In some soils, as a result of acid rain, a significant decrease in soil respiration was observed, while no decrease in dehydrogenase activity was found. Freezing and thawing had diverse effects on the enzyme activity of forest soils. These effects depended on the individual properties of the enzyme and on the properties of soil. Invertase activity did not change, whereas a significant increase in phosphatase and protease activities was noted. Changes in urease and dehydroghenase activities were connected with the properties of the investigated soils. The results obtained suggest that the findings referring to seasonal variation in soil enzyme activity should be interpreted very cautiously
Other language title versionsEnzyme activity of selected forest soils of southern Poland in the light of field and laboratory investigations
Book typeMonograph
Other categories ROZPRAWA_HABILITACYJNA
Author Kazimierz Januszek (FoF / IoEaS)
Kazimierz Januszek,,
- Institute of Forest Ecology and Silviculture
PublisherUniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie, MNiSW [80]
Publishing place (Publisher address)Kraków
Issue year1999
Book series /Journal (in case of Journal special issue)Zeszyty Naukowe Akademii Rolniczej im. H. Kołłątaja w Krakowie. Rozprawy, ISSN 1233-4189, (0 pkt)
No250
Pages132
Publication size in sheets9.25
Languagepl polski
Score (nominal)20
Citation count*24 (2015-11-10)
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