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Rate of soil organic carbon sequestration in stone quarries
Plasová, Marie ; Chuman, Tomáš (advisor) ; Šefrna, Luděk (referee)
As a result of minerals extraction, anthropogenically disturbed sites are created. In these sites we can study soil development, the rate of pedogenetic processes or the rate of nutrient accumulation. The aim of this thesis is to investigate the rate of sequestration and carbon stock in stone quarry soils in the area of granodiorite quarries near Skuteč, Czech Republic, where the quarries are different in successional age. The material was collected using the method of quantitative sampling with samples of defined volume. In total, 69 samples from 24 sites were collected in defined depths of 0-10 cm, 10-20 cm and the LFH horizon. The successional age varies from 1 year (new level without woody plants) to 84 years (Derková, 2020). The samples were processed to obtain fine earth and then the total amount of carbon (Ctoc) was analysed using mass spectrometer in the Stable and Radiogenic Isotope Research Laboratory at Faculty of Science, Charles University (Flash EA 2000 a TC/EA High Temperature Conversion Elemental Analyzer). Then the dependency between the rate of carbon sequestration, carbon stock and the successional age of the location was analysed using linear regression. The result obtained indicate that the carbon stock increases with increasing successional age, whereas the sequestration rate...
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The employment of cone penetrometer to detect soil compaction in a model area
Plasová, Marie ; Chuman, Tomáš (advisor) ; Vlček, Lukáš (referee)
There are some authors who claim that the soil is one of the nonrenewable resources, because pedogenesis is thousand-years-long process. Unfortunately, natural features of soil are often degraded - the mechanism of this is describe below in this work. The thesis focuses on one of the soil degradation processes - pedocompaction in context of intensive agriculture. It is much better to prevent the soil compaction then to try to fix it afterwards; the price is high and the soil after land development is still not as good as it originally was. In this work we used a model area in Kleneč in an attempt to examine the relationship between a colored mosaic seen on the ortophoto with data on profile depth gained from terrain measuring using cone penetrometer. The results were analyzed statistically using Spearman correlation coefficient and regression analysis. Their results are somewhat contradictious: the correlation is 37, 6 % with p-value 0,44 and the regression is 6,55 % with p-value 0,18. The reason could be that the relationship between the phenomena is non-linear. For clearer conclusion, it would be better to do more analysis on the field and in the laboratory as well. Key words: soil degradation, soil compaction, pedocompaction, penetrometer
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