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Influence of soil management on properties of humic substances
Rubínková, Eva ; Pospíšilová, Ľubica (referee) ; Klučáková, Martina (advisor)
The aim of the Diploma thesis is to consider an influence of soil management (rotation of crops on arable land and grassland) to quantity and quality of humic substances. These properties are depended not only upon way of soil management, but also upon climatic effects, such are rainfall, temperature, elevation above sea-level, level of underground water and content of clay. Significantly influenced factors are content and form of organic carbon which is very tightly bonded to humic substances. In this work the humic acids content and properties progression was studied in given time period. Also the effect of crop rotations to changes of physical and chemical properties of humic acids in soil environment was observed. Diploma thesis was realized in co-operation with Mendel University in Brno, which supplied elaborating samples. Studied soil samples were taken from humus horizon Cambisol modal Vatín during years 1999–2006, always in autumn. Individual samples were characterized by available analytical methods, which are generally used in humic substances research area. They are especially fluorescence spectrometry, UV-VIS and infrared spectrometry and acid-base and conductometric titrations.
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Isolation of fulvic acids from soil origin and fluorescence study
Rubínková, Eva ; Kozáková, Zdenka (referee) ; Fasurová, Naděžda (advisor)
Aim of this bachelor thesis was to find the optimal procedure and evaluation of soil fulvic acid (FA) isolation (soil type Eutric Cambisol, locality Vatín). Soil Cambisol contained higher amount of fulvic acid than humic acid (37,5%). Isolation and purifying of fulvic acid was made with 0,3 % yield. Fluorescence measurement by synchronous mode was used and compared with spectra of FA standard Elliot II. SFS spectra were similar. The main fluorophore of FA sample at excitation 358 and emission 448 nm from SFS spectra was determined.
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Influence of soil management on properties of humic substances
Rubínková, Eva ; Pospíšilová, Ľubica (referee) ; Klučáková, Martina (advisor)
The aim of the Diploma thesis is to consider an influence of soil management (rotation of crops on arable land and grassland) to quantity and quality of humic substances. These properties are depended not only upon way of soil management, but also upon climatic effects, such are rainfall, temperature, elevation above sea-level, level of underground water and content of clay. Significantly influenced factors are content and form of organic carbon which is very tightly bonded to humic substances. In this work the humic acids content and properties progression was studied in given time period. Also the effect of crop rotations to changes of physical and chemical properties of humic acids in soil environment was observed. Diploma thesis was realized in co-operation with Mendel University in Brno, which supplied elaborating samples. Studied soil samples were taken from humus horizon Cambisol modal Vatín during years 1999–2006, always in autumn. Individual samples were characterized by available analytical methods, which are generally used in humic substances research area. They are especially fluorescence spectrometry, UV-VIS and infrared spectrometry and acid-base and conductometric titrations.
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Isolation of fulvic acids from soil origin and fluorescence study
Rubínková, Eva ; Kozáková, Zdenka (referee) ; Fasurová, Naděžda (advisor)
Aim of this bachelor thesis was to find the optimal procedure and evaluation of soil fulvic acid (FA) isolation (soil type Eutric Cambisol, locality Vatín). Soil Cambisol contained higher amount of fulvic acid than humic acid (37,5%). Isolation and purifying of fulvic acid was made with 0,3 % yield. Fluorescence measurement by synchronous mode was used and compared with spectra of FA standard Elliot II. SFS spectra were similar. The main fluorophore of FA sample at excitation 358 and emission 448 nm from SFS spectra was determined.
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