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Vliv digestátu na půdní sorpční komplex kambizemě
Doležalová, Eliška
The aim of this bachelor thesis is to determine the influence of applied fertilizers, specially digestate, on properties of soil sorption complex. The field experiment was established in 2014 at the plant research centre in Vatín near Žďár nad Sázavou. The vegetation cover was based on permanent grassland, maize monoculture and Norfolk cropping system. Types of fertilizers: anaerobic digestate, mineral (industrial) fertilizers and manure. The full fertilizer dose was 150 kg N / ha; P and K content are the same for all fertilizer variants. I determined hydrolytic acidity, base cation content, cation excange capacity and base cation saturation according to Kappen for samples from depths of 0 -10 cm and 10 - 20 cm.The application of digestate reduces hydrolytic acidity, increases the content of cations, cation exchange capacity, and the degree of saturation of sorption comlpex. These changes occur only at a depth of 0 - 10 cm.
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Srovnání bylinného patra spontánně vzniklých a uměle založených lesních porostů na bývalé zemědělské půdě v okolí Huslenek
Kretová, Hana
This master thesis deals with phytocoenosis of forest stands situated on former agricultural lands near the village of Huslenky in the Vsetín region. The goal of this thesis is to compare synusia of non-woody brushwood seedling forest vegetation and artificially established stands. The research was conducted via phytocoenological analysis of four different forest units containing stands of different species with heterogenous spatial and age structure. A total of 83 phytocoenological releves were performed. The data set was extended for comparison during electronic processing by data collected in bachelor thesis by Kretová (2016), which deals with artificial afforestation of the same area of interest by spruce stands. A total of 107 phytocoenological releves were evaluated eventually. For a more comprehensive assessment of differences in the herb layers of selected stands, the soil environment was also evaluated. According to botanical outcomes there is a significant difference between species compositions of artificially established spruce stands and spontaneously growing native stands. Successional stands seem to resemble forest ecosystems and contain more of typical forest species than spruce stands even though they are quite young. The main outcomes of pedological research were pH values, degrees of saturation of sorption complex and carbon contents of evaluated soils. The pH values were significantly higher in broadleaved stands with the differences most obvious for an Ah soil horizon. The carbon contents are much higher in an Ah horizon and they are slightly higher for spruce stands than for broadleaved ones. When the values of sorption complex are taken into consideration it is possible to observe how spruce stands affect the soil by an increment of the content of acidic ions which is caused by their litter. A typological differentiation was carried out for seedling forest stands which have not yet been classified as a land intended to fulfill forest functions. In addition, the indicational potential of an herb layer was discussed as well as a comparison of native and artificial stands in regard to superstructure units of the geobiocenological system.
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Obsah živin a charakter půdního sorpčního komplexu u vybraných půdních typů
Němec, Jakub
Diploma thesis " Nutrient content and character of soil colloidal complex in selected soil types " is aimed at chemical properties of Haplic Chernozem, Haplic Luvisol, Haplic Cambisol, Gleyic Stagnosol and Calcaric Leptosol. Obtained results were compared with Systematic Soil Survey (1965 -- 66). Loss of humus and higher acidity was determined in Haplic Chernozem. Other soil types were low or middle low in nutrient content. Quality of humic substances was also low and there is necessary to improve nutrient regime and humus content in arable soils.
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