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  • Author: Jarosław Lasota x
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Ewa Błońska, Jarosław Lasota and Kazimierz Januszek

Abstract

The aim of this study was to determine the enzymatic activity (dehydrogenase and urease) in trophically diverse Gleysols. Efforts to establish the relationship between enzymatic activity and physico-chemical properties of various subtypes of Gleysols were attempted. Dehydrogenase activity was best correlated with carbon content and acidity among the studied properties of soils. Urease activity was correlated with the reaction pf soil. Enzyme activity differentiates subtypes of Gleysols, which are characterized by a different type of soil humus. The dehydrogenase activity was higher in gleysols with peat or muck of swamp habitats. The opposite trend was found in the urease activity. The urease activity was the highest in the gleysols without organic matter. The studies showed that enzymatic activity is closely related to the type of accumulated organic matter and at the same time with species variety of plant communities..

Open access

Wojciech Piaszczyk, Ewa Błoñska and Jarosław Lasota

Abstract

The aim of the study was to assess the effects of organic fertilization on selected chemical properties of the soil and the activity of dehydrogenase and β-glucosidase in the soil of forest nursery. The main goal was to evaluate the role of organic fertilizers in carbon storage in the forest nursery soil. Sample plots were located in northern Poland in the Polanów Forest District on a forest nursery. Soil samples were collected from horizon 0–20 cm for laboratory analyzes. In soil samples pH, soil texture, and organic carbon, nitrogen, base cation contents, dehydrogenase activity and β-glucosidase activity were determined. The obtained results were used to evaluate the carbon storage. The results confirm the beneficial effect of the applied organic fertilizer on chemical properties of the soils under study and their biological activity. The applied organic fertilizers had an impact on increased accumulation of soil organic matter. In the soils investigated, there was an increase in the activity of such enzymes as dehydrogenases and β-glucosidase.

Open access

Ewa Błońska, Jarosław Lasota and Kazimierz Januszek

Abstract

The aim of this study was to determine the enzymatic activity (dehydrogenase and urease) in trophically diverse Brunic Arenosols and Cambisols. Efforts to establish the relationship between enzymatic activity and physico-chemical properties of various subtypes of Brunic Arenosols and Cambisols were attempted. Another aim was to determine the effect of vegetation on the properties of soil surface levels. The study was conducted on 94 plots located in nature reserves and national parks in the Polish lowland area. Dehydrogenase activity and urease showed large variations in the subtypes of the distinguished Brunic Arenosols and Cambisols. Dehydrogenases and urease activity in surface layers of fresh humus of Cambisols and Brunic Arenosols was strongly associated with the plants. This is confirmed by the relationship between the enzymatic activity and the type of accumulated humus substances, the ratio of carbon to nitrogen and humus horizons reaction.

Open access

Ewa Błońska, Jarosław Lasota, Maciej Zwydak and Wojciech Piaszczyk

Abstract

In this research study, enzyme activity was used to assess differences occurring in soils as a result of the different tree species influence. The aim of the study was to assess the effects of Scots pine (Pinus sylvestris), sessile oak (Quercus petraea) and mixed-species stands on the enzymatic activity and chemical characteristics of soil. Sample plots were located in central Poland, in the Przedbórz forest district (51.09.59.50°N, 20.00.24.25°E). The test area was dominated by Brunic Arenosols. 15 research plots were established (5 plots under pine, 5 plots under oak and 5 plots under mixed-species stand). Soil samples from the O, A and AB horizons were taken. In soil samples pH, soil texture, and organic carbon, nitrogen, base cation contents, dehydrogenase activity and urease activity were determined. Tree species affected soil organic matter accumulation, pH and microbial activity. The highest enzyme activity was reported in the soils under oak and mixed-species stands. The soil pH was lower under pine forest than under oak and mixed-species stands. pHs is presumably a major factor affecting microbial community composition and enzyme dynamics. We noted a significant correlation between enzyme activity and C/N ratio which is often used to describe litter quality. A lower C/N ratio was found in oak and mixed-species stands compared with pine stands.