National Repository of Grey Literature 66 records found  beginprevious51 - 60next  jump to record: Search took 0.00 seconds. 
The issue of transfer selected hybrids of the orchids genera, grown under aseptic conditions in vitro, into non-sterile conditions
KELÍŠEK, Michal
In this paper experiments were made with three taxa of orchids. The first part was to find out whether the treatment of plants with potassium permanganate (KMnO4) has any impact on mortality during the transfer from in vitro culture to the unsterile environment of routine cultivation. All three taxa were divided into two parts and only one part was always treated while the other not. The deaths in individual groups were recorded during the experiment. In the second part the effect of fertilization on the biomass growth was investigated on two taxa. The method was again based on the division of the taxa into two parts and the fertilization of only one part. Necessary data were obtained by the weighing of plants at the beginning and end of the experiment. The results of the first experiment indicate that treatment of plants during the transfer has no impact on the subsequent mortality. In the second part, the dependence of fertilization on the biomass growth has been successfully proven in only one of the two taxa.
The influence of factors at produce starch of potato
ŠOBROVÁ, Martina
The thesis is focused on the factors influencing the production of starch potatoes. These factors include the influence of variety, seed, soil, stress, fertilization, climatic conditions and weather. The work also provides basic information about potatoes, the history of the potato and its importance, the use of potatoes, the biological characteristics, morphology and chemical composition of potatoes. There is also an evaluation of the economics for potato starch processing.
Effect of eutrophication on primary production of a herbaceous wetland
BORDOVSKÁ, Monika
This work is part of a study of wet meadows within the project GA CR 526/09/1545. The objective of the project is to determine the importance of newly assimilated carbon for the plat-soil interactions of plants with in wet grassland ecosystems in changing environmental conditions. As part of this project, a wet grassland ecosystem near Hamr situated in the Nežárka river floodplain was assessed in terms of aboveground production. This work includes data from 2010 and 2011. Each year the biomass was sampled two times. At each sampling, 24 samples were collected from plots differing in the intensity of fertilization. The treatments included high intensity of fertilization, low intensity of fertilization and no fertilization. In 2010, the annual production of aboveground biomass was 863.88 gm-2 on plots with a high intensity of fertilization, 788.46 gm-2 on plots with low intensity of fertilization and areas 839.69 gm-2 on unfertilized plots. In 2011 the annual production of aboveground biomass was 1149.71 gm-2 on plots with high fertilization, 953.73 gm-2 in plots with low fertilization, and 930.25 gm-2 on plots without fertilization.
Control of couch grass Elytrigia repens (L.) Desv. on agriculture land
Mikulka, Jan
This methodology includes the newest knowledge on biology, ecology, expansion and reproduction of couch grass including newest finding about methods integrated weed management. This methodology summarised influence of crop rotation, soil tillage, fertilisation and methods application of herbicides in field crops.
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The methodics of plant nutrition and fertilization by phosphorus
Kunzová, Eva
The methodics inform about situation in plant nutrition and fertilization by phosphorus on arable soil in Czech Republic. The methodics indicate two approaches for assessment of fertilization demand utilized as well for checking of phosphorus input limits requested by different legislation. There is evaluated need of phosphorus for expected production and soil fertility stabilization.
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Foliar nutrition of cereals
Trčková, Marie ; Raimanová, Ivana ; Svoboda, Pavel
Methodology provides information on physiological aspects of foliar nutrition of plant; it deals with importance of foliar fertilizers and additional plant agents in nutrition system of cereals. Moreover it describes main principles of application of leaf fertilizers. List of foliar fertilizers intended for cereals and features of additional plant agents are integral part of this methodology.
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The methodics of plant nutrition and fertilization by potassium
Kunzová, Eva
The methodics inform about situation in plant nutrition and fertilization by potassium on arable soil in Czech Republic. Methodics is found on utilize analytical procedure for determination of content available potassium (Mehlich 3), whose it is possible subsequently use for calculation optimal fertilization.
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Effect of fertilization on primary production of a herbaceous wetland stand
SLÁMA, Miroslav
The bachelor thesis is part of the project GA CR 526/09/1545, which explores the relationship between the carbon cycle, soil and wetland plants in varying conditions of external environment. Within this project total abovengroud biomass produktion was evaluated at the site Hamerské louky in the floodplain of the river Nežárka. Effect of fertilization on these sites is investigated since the beginning of the growing season 2006. On average, the highest biomass yield (all live and dead biomass except litterfall) from the first sampling (10.6.2009) was reached on the site with high-intensity fertilization (494,89 g.m-2). The highest living biomass yield was also reached on the site with high-intensity fertilization (on average 443,88 gm-2). The highest biomass of the stubble from the first sampling was recorded on sites without fertilization (107,14 g.m-2) as well as litterfall (56,05 g.m-2). The difference between treatments were not statistically singnificant. Annual production of aboveground biomass was 823.99 gm-2 in variants with high-intensity fertilization, 642.64 gm-2 in slightly variant fertilization and 698.14 gm-2 in variants without fertilization
Comparison of the reproduction of the goats on the ecological and the conventional farm
PRAVDOVÁ, Lenka
The aim of my diploma thesis is comparison and evaluation of reproduction of goats on an eco-farm and on a conventional farm. Measures of reproduction of observed herds were assessed in the years of 2009 and 2010 on an eco-farm Hana Langová and on a conventional farm Bára Schneedorferová. On an eco-farm, a herd of 20 does was observed. Crossbreeds of White shorthaired goat, Brown shorthair goat, Boer goat and Anglo-Nubian goat; all bred with a White shorthaired buck and a Boer buck. On a conventional farm, a herd of 24 White shorthaired does and two crossbred does of White and Brown shorthaired goat was observed in 2009. In 2010, only 18 does were observed. In both years the does were bred with two Brown shorthair bucks. The measured results were compared with milk efficiency results between the two years and also between the farms. In both years, higher fertility was discovered on an eco-farm. On a conventional farm, very low fertility was observed in 2009 (116 %). On the other hand, fertilization was higher than on an eco-farm in both years. Very big difference was also observed in the ratio of male kids, which was in both years higher on a conventional farm, where all the bred animals (apart from one) are hornless. Reproduction is to a high extent influenced by external environmental factors and to a very small extent by genetics. A whole range of possible effects was omitted from the observations, however, the main ones were noted. Of all the observed measures of reproduction, the only one which could be substantially influenced by the breeding method is fertility.
Effect of mineral nutrient availability and flooding on the growth of Carex acuta in a mesocosm experiment
SYCHROVÁ, Jana
This MSc thesis is part of the project GACR 526/09/1545 Importance of newly assimilated carbon for the plant-soil interactions in wet grassland ecosystems in varying environmental conditions, which focuses on the effects of eutrophication on selected wet meadows with mineral or organic soil in the Trebon Biosphere Reserve. The results of this project will serve as a basis for developing a suitable ecosystem management for wet meadows, especially for sites registered as nature reserves. Pot experiments were carried out with Carex acuta, a dominant species of wet meadows that has already been subject of many studies. The aim of this work was to find out how C. acuta responds to different levels of fertilization and soil flooding under controlled conditions. The growth of the generative shoots of C. acuta was significantly affected by fertilization. The growth of vegetative shoots was significantly influenced by the soil organic matter content and fertilizer addition. The vegetative shoots reached greater length than the generative shoots. The pot experiment indicates that fertilization has not a large influence on the growth of C. acuta. This finding may explain field observations that C. acuta is gradually replaced in eutrophic habitats by stronger competitors, especially Phalaris arundinacea.

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