The changes in the content of CO2 in soil after compression of forest mechanization passes
2013
Allmanová Zuzana
The thesis is aimed on evaluating the soil damage caused by forest mechanization traffic – special forest tractors and universal tractors. The main goal was to determine the changes in the content of CO2 in soil after compression and the causes of CO2increase under the compressed soil – identification of factors causing the increase. Measurements were carried out in four forest stands in the municipal forests of Stara Tura, in which regeneration exploitation was carried out. The stands were alike in age, terrain incline, terrain and soil type. The data on the depth of tracks was collected by means of transverse profile method, samples of soil from the stand and track were taken to determine the volumetric weight and humidity. The differences in content between the stand and track were determined through a VAISALA MI70 device. The depth of tracks in both technologies reached grade 5 soil damage – heavy soil damage, which wass caused partially by the location of the stands in the flysch area and have a low carrying capacity. The measurements confirmed significant differences between CO2 content in unimpaired soil and compressed track soil (diff. 90%). Volumetric weight and humidity proved to be significant factors in CO2 content variability, these factors were studied further in the STATISTICA 10.0 software. Higher levels of humidity and volumetric weight were recorded in measurements of compressed track soil. Forest mechanization moving through the forest soil on the skidding trails causes measurable changes in soil characteristics.
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