|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
Monitoring of rust in selected grass species and their impact on the value of fodder.
HŘÍDELOVÁ, Lenka
The aim of the thesis is evaluation of occurence of rusts on the selected types of grass, their specific diagnosis and valorization of their influence on the important agricultural qualities. The experiment was carried out in a cooperation with SS Větrov. In a two-year period (in 2009 and 2010) the samples of infested plants, which were subsequently evaluated microscopically, were taken. The ascertained results were processed through the Kruskal-Wallis test and the Independent Group T-Test. In 2009 and 2010 the occurrence of stem rust on the tested types of grass was significantly higher than occurence of crown rust. From the total number of 513 tests stem rust was found in 353 cases, whereas crown rust was found only in 103 cases. In 27 samples the occurrence of both types of rusts was found and there was no occurence found on the rest of the plants. The results show that in our climatic conditions stem rust becomes the most frequent pathogen which causes rustiness of grass. In 2010 the results of turf experiments proved that the selection of genotype of perenne reygrass with a lower infestation by stem rust had a positive impact on health conditions and better appearance of the offspring of the selected plans. Effectivenes of selection was confirmed. Among the tested materials there were chosen very predisposed genotypes which could be useful as the infectious material in the planned greenhouse tests for the resistance against rusts. Currently, we have also been abble to recognize the genotypes which are relatively resistant against particular rusts. If their resistance is confirmed in the following period, they might be used as donors of resistance in xenogamy and as immune standards in tests. The introduced results from the first stage of cooperation are only preliminary and it will be necessary to verify them at the following stages.
|
|
|
Following the growth, development, and speeds the aging of selected forage grasses.
ROUBÍČKOVÁ, Markéta
The grasslands are in the Czech Republic a significant element of the landscape and also one of the essential components of diets of ruminants and horses. In connection with the production function of grasslands is an important forage quality, especially in dairy cows with high yielding. To create high quality roughage is essential for the optimal harvest of grass maturity date, which significantly affects the nutrient content, the energy and digestibility. Between 2009 and 2010 was monitored growth, development and the speed of aging in selected varieties of forage grasses. In the breeding station Větrov grasses were sampled, dried and then analyzed in a laboratory at the Department of Crop Production University of South Bohemia in the České Budějovice. Eighteen varieties of grasses collected in seven successive terms in the month of May and June were total analyzed. In all samples were laboratory way determined dry matter, ash, fiber and in selected varieties of grasses digestibility. Dry forage yields increased gradually. In the process of aging occurs between phenological for all the analyzed varieties of grasses, was increasing fiber content, which corresponded to the decreasing digestibility. The highest digestibility reached in the current term in the field of silage ryegrass Lonar and italian rye grass Prolog. The lowest digestibility was observed fescue Proba.
|
|
|
Assessment of forage characteristics of a new varietes and new-cultivated forage grasses and legumes
ŘEBÍKOVÁ, Michaela
Grasslands are an important stabilizing and conservative part of agriculture-system through mid-europian conditions. Permanent and temporary grasslands have a lot of production and non-production functions. The aim of thesis is an assessment of fodder and agro-technical qualities of selected new varieties, cultivation of fodder grass and clovers in monocultures and simple mixtures and proposal of instruction to use of tested fodder species. The experiment has been taken at breeding station TAGRO Červený Dvůr s. r. o. The fodder grass experiment at small plots started in 2006. The clovers experiment at small plots started in 2007. The fodder grass experiment has been analyzed for 1st, 2nd and 3rd utilitarian year and the clover experiment for 1st and 2nd utilitarian year. Average production of dry grass material has been found of 16,24 t.ha-1 (Bromus inermis Tabrom) to 20,43 t.ha-1 (Arrhenatherum elatius Median). Average production of dry clovers material has been found of 11,31 t.ha-1(Trifolium pretense Tábor) to 13,28 t. ha-1(Bromus marginatus Tacit + Medicago sativa Pálava). The highest yield of dry biomass show Arrhenatherum elatius Median, Dactylis glomerata Trerano and Festulolium Hykor. These varieties are suitable to grow as a monoculture. The highest yield of dry clovers material show Lotus corniculatus Lotar, Taborak and Malejovský. Suitable mixtures are Bromus marginatus Tacit + Medicago sativa Pálava and Bromus inermis Tabrom + Medicago sativa Pálava.
|
guest ::
