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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Mikrobiologická charakteristika půd lokality Buchel (kraj Dornogobi, Mongolsko)

Hrubešová, Eva January 2008 (has links)
No description available.
2

Bilance uhlíku u prasat

Svätá, Andrea January 2014 (has links)
The aim of this final thesis was to create a model of the pig farm with a closed herd turnover, where the carbon balance was calculated. I counted the carbon balance based on nutrient digestibility coefficients of various feed. Thanks to the feed analyzes I found out the carbon content in feed and the feed rations. The carbon content in the slaughter pigs bodies was found through analysis of the slaughter pigs bodies. Through the analysis of digestible nutrients I discovered the carbon production in the excrement. On the model farm with 1000 sows, 27 860 piglets are born every year, 24 795 are bred and 23 542 pieces are killed. This farm consumes 7025 tons of mixtures of which 34 tons of mixture piglets prestarter (COS1) is consumed, 276 tons of mixture for piglets starter (COS2), 870 tons of mixture A1, 1655 tons of A2 mixture, 3442 tons of A3 mixture, 601 tons of KPB mixture, 63 tons of KPK mixture, 4 tons of KA mixture, 80 PCH and 1 tone of OKAS. Pigs on the farm take 2670 tons of carbon per year, 498 tons sewage in excrements and hold 648 tons of carbon in their bodies. At the same time pigs take 180 tons of nitrogen per year, sewage 33 tons of excrement and hold 77 tons of nitrogen in bodies. For the production of 1 kg of slaughter pigs on a model farm pigs need 0.24 kg of carbon and per 1 kg of edible parts it is 0.36 kg of carbon. From the above data I calculated, that pigs pollute the environment by 2.67 tons of carbon per 1 sow and 0.18 tons of nitrogen per 1 sow. This carbon can benefit plants on adjacent farms, some part may remain in the atmosphere and increase the carbon footprint.
3

Obsah uhlíku v nadzemní biomase smrkových porostů s různými variantami pěstební výchovy

Rosík, Jiří January 2011 (has links)
No description available.
4

Obsah mikrobiálního uhlíku v půdě při různém způsobu obhospodařování

Hábová, Magdalena January 2014 (has links)
Diploma thesis deals with stabile and labile organic carbon forms in soils. During 2009 - 2011 selected soil parameters in soil under different management were studying. Following parameters were chose - total organic carbon, labile carbon, and microbial carbon, content of humic substances, humic acids, fulvic acids, and basal soil respiration. Object of study was Luvic Chernozem (Unčovice), Haplic Cambisol (Vatín), and Haplic Luvisol (Lesonice). Soils were under classical tillage and minimum tillage system, and permanent grassland system. Obtained results showed that all studied soil types had satisfying content of total organic carbon and total nitrogen for soil microorganisms. The highest labile carbon content, microbial biomass and basal soil respiration was determined in permanent grassland soil.
5

Organický uhlík v půdě a jeho vztah k labilním formám TK

Pospíšilová, Martina January 2012 (has links)
No description available.
6

Porovnání biologických a chemických vlastností orných půd a půd pod trvalým travním porostem

Bystřická, Lucie January 2019 (has links)
Diploma thesis is focused on assessment of soil chemical and biological properties of Haplic Cambisolin different types of land use (permanent grassland and arable soil, intensively used in agriculture). Field experiments are carried out at the Forage crops Research Station of Mendel University in Brno at locality Vatín. Selected soil parameters such as humus content and quality of humic substances, soil reaction, water extractable carbon content, amount of microbial biomass, and basal soil respiration and substrate inducted soil respiration were determined by commonly used standard methods. Measured data set during 2017 and 2018 was statistically evaluated using program StatisticaCZ12, software (StatSoft software Inc., Tulsa, Oklahoma, USA). Obtained results shown statistically significant differences between arable soil and permanent grassland in total organic carbon content, humic substances content,amount of microbial biomass, water extractable carbon content, basal soil respiration.
7

Porovnání zásoby organického uhlíku v půdách s různým způsobem využití / Comparison of organic carbon stocks in soils with different land use

Rašková, Renáta January 2016 (has links)
The aim of this thesis was to determine and compare the carbon stocks in selected locations. Three localities were selected in Vyškov region. In each locality four types of soil according to their use were examined - forest, arable land, grass land and urban soil. From each type of soil four samples were taken which were located 10 meters from each other. Samples were taken by soil auger from 0 to 40 cm depth in November 2015. All samples were dried, ground and sieved. Consequently humus content was determined in samples by the Tyurin method. From these results content and stocks of organic carbon were calculated in each locality and each type of land use and all results were compared with each other. Contribution of this thesis was to confirm or disprove hypothesis and to provide helpful information on Vyškov region. Hypothesis: The stock of carbon in forest soil is higher than in arable land. The stock of carbon in arable land is higher than in urban soils. The highest content of SOC was in forest soils and the highest stock of organic carbon was in arable land. Results show that the stock of carbon in soil is affected by land use and also by the way of management.
8

Vliv rozdílných typů zástinu na vybrané vlastnosti plantáží Coffea arabica v okolí města Villa Rica, Peru

Ehrenbergerová, Lenka January 2017 (has links)
Coffee belongs to very important crops in the world and it is traditionally grown in agroforestry systems. During the five years the four coffee plantations with different type of shading were studied in the foothills of the Peruvian Andes. The highest amount of carbon was found in the plantation shaded dominantly by Eucalyptus spp., followed by Pinus spp., Inga spp. and non-shaded site. The microclimatic characteristic measurement shows that shading reduces the mean air and soil temperatures and increases the air humidity, compared to the non-shaded site. It was recorded drier soil conditions at the shaded site. At all plantations, coffee variety and age had a significant effect on Coffee Leaf Rust incidence. The value of the timber stored in shade trees varied significantly. There were different results for different shade trees species (from 2% to 72% of the annual income from coffee production).
9

Stav půdního organického uhlíku vybraných stanovišť rekultivovaných ploch Velké podkrušnohorské výsypky / Status of soil organic carbon content of selected reclaimed sites in the Podkrušnohorská dump.

KOBESOVÁ, Martina January 2013 (has links)
The main aim of this thesis was to assess the status of soil organic carbon in newly shaped soils called Velká podkrušnohorská dump in the Sokolov district and evaluate the information in relation to the physic-chemical properties of soils. Another objective was to determine the relationship between the stable and labile fractions of soil organic carbon. The amount of soil carbon (stable fraction) was measured in the solid soil samples and there was the analysis of basic physic-chemical parameters of the soil performed. The highest concentration of soil carbon was measured in the stand alders and larch. The amount of soil carbon (labile fraction) was measured in the water extract. The highest values were measured in the stand silver birch and alders. Based on this data the quotient of the labile fraction from the stable fraction was determined and the correlation of the labile and stable fractions was made. It was found out that the higher quality soils are located at the leafy trees, but it leads to leaching of organic carbon. The bulk density and coarse-grained soil fraction was determined from the physical properties and these data were used to calculate the stock of soil organic carbon. The highest value was measured in deciduous forests with small-leaved linden, in coniferous forests with larch. The stocks of soil organic carbon were converted into codes by land cover categories and the thematic map was created. It was found out that the leafy trees are much more appropriate for forest restoration, because they are characterized by the rapid initial growth, easily degradable plant litter and stable form humus. Deciduous forests are also characterized by more developed soil substrate, which is however unstable.
10

Možnosti využití fermentačního zbytku z bioplynových stanic

Kazdová, Jana January 2015 (has links)
Diplomová práce "Možnosti využití fermentačního zbytku z bioplynových stanic" se zabývá možnostmi zpracování a využívání fermentačního zbytku z bioplynových stanic se zaměřením na možnost jeho spalování. Úvodní část je zaměřena na proces anaerobní fermentace a seznámení s historií a současným stavem anaerobní fermentace a bioplynových stanic v České republice. Další částí práce je popis technologie bioplynových stanic a samotných možností zpracování a využívání fermentačního zbytku. V praktické části jsou popsány činnosti, které byly v rámci diplomové práce prováděny. Výsledkem práce je následně soubor dat, grafů, výpočtů a dalších informací, na základě kterých je v závěru zhodnocen proces spalování fermentačního zbytku.

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