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The influence of water regime and management on the productive capacity of grassland
JANDA, Jiří
The first part of the thesis is devoted to the distribution, importance of permanent grasslands, proper management of grasslands and maintenance of optimal water regime. Water is essential for photosynthesis and plant growth and therefore its availability affects the quantity and quality of biomass produced. The literature on water regime such as rainfall, soil permeability, ground water availability and its effect on grassland production capacity is reviewed. Management techniques such as fertilization and tillage that can help maintain a suitable water and nutrient regi-me for the grassland are also described. In the second and third parts of the thesis, the results of investigating grazed and mown grassland under different water regime and animal load are presented. Furthermore, the climatic conditions of the site are described. The botanical condition of the grassland is elaborated. The influence of the load and water regime on the condition and productivity of the grassland under study is eva-luated. As the water regime increased, the cover of valuable grasses and clovers decreased and the proportion of reticulate and sedge species increased. Measures (fertilization and amendments) were proposed to improve the species composition of the vegetation.
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The production of biomass and dry matter at maize and sorghum for silage
TROJÁKOVÁ, Gabriela
The aim of this thesis was to evaluate and compare the production capacity of the two hybrids of maize (Zea mays L.) genotypes and selected sorghum (Sorghum Adams). For the evaluation of this experiment there was based a plot on the piece of land of South Bohemia University in České Budějovice. The samples were picked up before harvest to compare the evaluated high - yielding indicators. The number of samples depended on the desired dry matter content in biomass. During corn harvest the yield of biomass was determined, and yield and share of corncobs, dry matter content of biomass and corncobs, and yield of dry biomass. At the harvest of sorghum the yield of biomass was determined, the content of dry matter and yield of dry matter in biomass. Out of one-year experiment it was found out a slower increase of dry matter content in sorghum hybrids in comparison with the corn maize hybrids. Selected hybrids reached optimal values of solids dry matter content for the production of high quality silage.
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Production capacity and quality of silage corn silage hybrid selection of appropriate
SMAŽÍK, Jaroslav
The aim of this study was chosen for the field of observation should be hybrids of maize (Zea mays L.) for silage purposes from a wider set of hybrid genotypes. To evaluate the vegetation was established as a pilot experiment. Of this group were then selected 14 genotypes, which would satisfy most practical requirements. During the vegetation was monitored by formation of quantitative indicators required for silage maize hybrids. Before harvesting of collection of plants chosen for individual analysis of quantitative indicators, while processing the silage mass in laboratory conditions to evaluate selected quality indicators. When harvesting was imposed on the total yield of green and dry matter, dry matter content and proportion of buds on the plant.
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