|
|
Biodiversity of model agroecosystems on the ecological farm in the foothills of Šumava Mts.
OUŘEDNÍK, David
The content of the thesis was research and study of the epigeal beetle communities at three different sites in the cadastral municipality Mačice near village Soběšice in Western Region. Habitats were managed under organic farming. Specifically there were three different sites, a field sown triticale, meadow and pasture. Method of pitfall traps was used for the collection of biological material. In total, there were intercepted and identified 640 individuals from 57 species and 14 families in the reporting period. In all of the habitats, species of beetles family (Carabidae) (23 species) were mostly represented, followed by family rove beetles (Staphylinidae) (11 species) and family carrion (Silphidae) (6 species). Most individuals were found at the field habitat with the numbers in total of 255 (30 species from 8 families), followed by habitat meadow with 198 individuals (36 species from 9 families) and the pasture habitat with 187 individuals (34 species from 10 families). The species spectrum of epigeal beetles was divided into groups according to the sensitivity to anthropogenic influences. Species that do not have special requirements on the quality and nature of the environment (group E) dominated in all habitats with 48 species. Total of nine species inhabiting habitats moderately affected by human activities (group R2) were found in all habitats, the least of them occurred in the field (1 species) , pasture (5 species) and at the meadow were found most (6 species). Index of anthropogenic impacts shows that these are very heavily modified habitats. When comparing individual sites, field habitat (ISD 1,67 %) was found to be the most affected. The least affected was the meadow habitat (ISD 8,34 %). As a result we can conclude that the hypothesis that organic farming has a positive impact on biodiversity was not confirmed.
|
|
|
Pick-up truck Reviews Europrofi even with forage crop.
OUŘEDNÍK, David
This thesis is focused on the evaluation of pick-up truck Europrofi even with forage harvesting. In this study we focused on the appraisal of the chaff collector car Europrofi even when harvesting wilted forage and green depending on the number of knives, sharpening knives and moisture harvested forage. Evaluation of performance indicators and exploitation pick-up truck Europrofi even wilted at harvest, dry and green fodder. Influence of the length of chopped forage quality. A simple analysis of investment and operating costs. From the results we have found that sharpening knives and moisture harvested crop has great influence on the length of the chaff harvested material. From results we find out, that a sharpened blade to harvest the green grass we passed 27.9% of the stalk longer than 91 mm. In contrast, wilted grass cutting with blunt knives passed 73.8% of the stalk longer than 91 mm. Operating performance pick-up truck went 6.38 t.hod-1 at harvest wet grass and forage crop wilted we found 6.84 t.hod-1. Total cost of kit I Pöttinger Europrofi and New Holland TS 115 per ton of material are 128.6 Kč.t-1. Length of cut is getting worse with more dry material to be cut and blunt knives, so it is necessary to ensure the right to change the sharpening of knives and blades at least every day.
|
guest ::
