Wartość gospodarcza wybranych odmian traw i koniczyny białej
AbstractAssessment of the use value of grass cultivars is conducted commonly in conditions of mowing or simulated grazing, without animals. In the present study, the evaluation was conducted in conditions of grazing by sheep, where the impact of grazing animals are an essential elements. The use value of species and cultivars is the result of plants properties, animals behaviour (herbage intake, trampling) and the effect of the impact of grazing animals on plant growth. The aim of this study was to evaluate the use value of the eight cultivars of four grass species: meadow fescue (Skrzeszowicka and Skawa), orchard grass (Bara and Krysta), timothy grass (Skrzeszowieka and Skaut), perennial ryegrass (Mafia and Solen) and two varieties of white clover (Astra and Jura). C-ultivars were tested by grazing (experiment I and III) and by cut (Experiment II) management, in monoculture (experiments 1 and II) and mixtures (experiment III). Respectively to the site conditions (soil, weather conditions) the yield, persistence, the rate of intake by animals as well as.selected chemical composition were measured. On this basis, the feed value of cultivars were calculated. Among the evaluated cultivars, regardless of the manner of use, the most permanent were cocksfoot cultivars and the least stability characterized a variety of perennial ryegrass and white clover. Between varieties within species, no major differences in yielding were detected. Whereas higher yields were obtained by mowing than by grazing. Mixtures of cultivars had a higher yielding and more balanced within the growing season compared to their yield in monocultures. Pasture sward was better eat during spring rotation compared with summer and the highest intake rate characterized a variety of perennial ryegrass and white clover. There were no significant differences in chemical composition between the cultivars within the species. The highest feed value characterized cultivars of perennial ryegrass and white clover. The feed value of grasses were higher during spring regrowths while white clover were more valuable in summer regrowths. In a fresh, semidry habitats recommended to sow species are: orchard grass, due to its durability and fidelity of yields, and perennial ryegrass as a result of it influence on the forage quality.
|Other language title versions||Use value of selected cultivars of grasses and white clover cultivars|
|Publisher||Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie, MNiSW |
|Publishing place (Publisher address)||Kraków|
|Book series /Journal (in case of Journal special issue)||Zeszyty Naukowe Uniwersytetu Rolniczego im. Hugona Kołłątaja w Krakowie. Rozprawy, ISSN 1899-3486, (0 pkt)|
|Publication size in sheets||6.0|
|UWAGA||Ilość ark.wyd. na podst.informacji umieszczonej w stopce wydawniczej|
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