Browsing by Subject "ageing test"

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    Effect of seed storage on seed germination and seedling quality of Festulolium in comparison with related forage grasses (Efecto del almacenamiento de la semilla de Festulolium y especies relacionadas en su germinación y la calidad de plántulas)
    (2020) Stanisavljević, Rade; Poštić, Dobrivoj; Štrbanović, Ratibor; Tabaković, M.; Jovanović, M.; Milenković, Jasmina; Đokić, Dragoslav; Terzić, Dragan
    Tests of seed germination, seed dormancy and seedling growth were performed on 0-, 6-, 20-and 30-months-old seed lots of Festuloliumin comparison with Italian ryegrass (Lolium multiflorum) and meadow fescue (Festuca pratensis). Tests were performed on seeds harvested in 2 different years (2014 and 2015) resulting in no major difference between theyears. Seed storage affected seed viability and dormancy and seedling growth in all 3 grasses. The maximum germination of Festuloliumseeds was achieved 6 months after harvest (95% normal seedlings); germination decreased significantly thereafter. While maximum germination of L. multiflorumand F. pratensisseeds was also achieved following storage for 6 months, these germination rates (93 and 90%, respectively) were retained until at least 20 months in storage. After storage for 30 months, seed germination of Festulolium, L. multiflorumand F. pratensis had declined to 72, 79 and 83%, respectively. High germination in all species was associated with higher rates of seedling growth. In an artificial seed ageing test, a temperature of 41 °C (during 48 and 72hours) was found to effectively rank seed lots for germination performance in all 3 grasses. This test seems to have application for use in the seed trade to identify seed lots which could deteriorate more rapidly in storage. Further studies are needed toverify this hypothesis