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Comparison of GM hybrid maize MON 810 with hybrids selected
POSPÍCHAL, Miroslav
The aim of the thesis was to evaluate and to compare the rate of corn borer and the production capability of 4 hybrids of corn (Zeamays L.) of different earliness. For the comparison a variety test was layed out in the land of my father in Klimětice (Central Bohemia). Before the harvest a sampling for detection of dry matter content in the biomass has been made to determinate the date of harvest. The number of samplings depended on the attainment of required dry matter content in the biomass. By the harvest the yield and dry matter content of the biomass, yield and percentage of corn ears, dry matter yield and the starch yield were determined. In the experiments the differences in infestation of corn borer were determined. Further differences in observed parameters were found out, which were dependent on the different utility trends and earliness of the given hybrids. The result was the appreciation of the given hybrids and determining of their suitability for their growing in conditions of my fathers lands.
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Vliv vybraných faktorů ovlivňujících fermentační proces a využití živin kukuřičné siláže v bachoru
Poštulka, Roman
Corn silage quality is determined by fermentation process quality and nutrient utilization (i.e. starch and fiber). The goal of this trial was to observe the effect of plant protection (against European corn borer), used hybrid and silage additive on the fermentation process quality and ruminal degradability of starch and neutral detergent fiber. The trial was realized on three localities. For the rate of degradability assessment we used the method in sacco. We found high significant differences in the particular and total acid content. On the first locality, the silages from protected plants contained more acids (9,89 g/kg dry matter = DM) than control (7,72 g/kg DM). On other localities was the situation opposite. The lowest content of silage acids and titrable acidity values was measured in the chemical treated silages. These silages had a highest content of ethanol (3,47; 2,83; 4,38 g/kg DM). We confirmed the effect of plant protection on ruminal starch degradability on the first locality. The plant protection led to the decreasing of the starch degradability (45,97 resp. 48,02 %). The NDF degradability did not affect by any experimental factor.
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