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1996
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tom 442
169-181
EN
The aim of the studies was estimation usefulness of Arrhenatherum elatius and Lolium perenne for renovation by reseeding of moderately dry meadows. Estimation of some of biological features of those species such as: rate of emergence and tillering, development of above ground and underground biomasses, tillering intensity, vertical distribution of above ground biomass in the yields and ability to remain after reseeding was done. Three series of studies were carried out: pot experiments out in vegetative hall of Institute of Land Reclamation and Grassland Farming in Falenty; field experiments: pure stands and reseeding of degraded meadow after two times cultivation of the old sward using single species and mixture. Field experiments were carried out in experimental station of SGGW Grassland Department in Jaktorów, in the natural moderately dry meadow site. Cv. Wiwena of Arrhenatherum elatius and cv. Argona of Lolium perenne were studied. Two dates of sowing: spring and late-summer were using. It was found that cv. Wiwena of Arrhenatherum elatius and cv. Argona of Lolium perenne were suitable for reseeding of moderately dry meadows. They had fast growth and development rates after sowing. Arrhenatherum elatius has ability to good remains in the following years after reseeding. Lolium perenne is characterized by great competition only in the first year after reseeding whereas its persistence is not good enough in the following years. Moreover it was found that spring term was better for reseeding of moderately dry meadows. It guarantees better development of plant biomasses both above ground and underground. Irrespective of sowing date proper soil moisture is favourable to plant development and it is support to achieve success of reseeding.
PL
W latach 2005-2008 przeprowadzono trzy serie badań, w których oceniano wschody 7 gazonowych odmian Poa pratensis w 6 terminach siewu: 10 maja, 23 sierpnia, 10 września, 10 października, 10 listopada i 7 grudnia. Niezależnie od odmian i serii badań początek wschodów notowano najwcześniej na obiektach z sierpniowymi terminami siewu (w 19 dniu od daty siewu), a najpóźniej na obiektach z listopadowymi terminami siewu (dopiero wiosną następnego roku, w 157 dniu od daty siewu). Na obiektach z wszystkimi terminami siewu we wszystkich seriach badań najwcześniej wschody obserwowano u odmiany Bila. Natomiast odmiana Conni wyróżniała się szybkimi wschodami tylko na obiektach z październikowymi i grudniowymi terminami siewu.
EN
Three study series aimed at evaluating the emergence of 7 lawn Poa pratensis cultivars at 5 sowing dates (10 May, 23 August, 10 September, 10 October, 10 November, and 7 December) were performed in 2005-2008. Regardless of cultivars and study series, the emergence beginning was recorded at the earliest on objects with the August sowing date (19 days after sowing), while the latest on objects with the November sowing date (in spring of the following year, 157 days after sowing). On objects with all sowing dates and for all study series, the earliest emergence was observed for Bila cv. Conni cv. was distinguished by quick emergence not only on objects with October, but also December sowing dates.
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