Wpływ nawożenia azotem oraz naświetlania na wielkość plonu nasion czterech gazonowych odmian Poa pratensis
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Grygierzec B. - 2009.pdf (83.87 KB)
Authors
Date
2009
Journal Title
Journal ISSN
Volume Title
Publisher
Europejska Federacja Łąkarska (Europeas Grassland Federation)
Abstract
The research aimed at determining the effect of pre-sowing stimulation of four Poa pratensis lawn cultivars with a laser diode and diversified nitrogen fertilization on seed yield. Moreover assessed were the number of plants per 1 m2, the length and width of panicles and effectiveness of seed settling in spikelets. In seed plantations of Poa pratensis, nitrogen fertilization applied in the quantity of 120 kg N/ha in two equal doses in early spring and in autumn, and 3 × 30 s irradiation with laser diode increased the number of generative shoots by 58-95%, effectiveness of seed settling in spikelets by 22-34% and width and length of panicles almost twice. The highest seed yields were obtained after 3 × 30 s pre-sowing irradiation of kernels combined with nitrogen fertilization dosed 120 kg N/ha, divided into 60 and 60 kg N/ha for Bila and Conni and 90 and 30 kg N/ha for Alicja and Limousine.
Description
The research was conducted in 2005-2007 at the of the Malopolska Plant Breeding Experimental
Station – HPB in Skrzeszowice (220 a.s.l) near Krakow, on degraded chernozem developed
from loess. Experimental objects consisted of seed plantations of four lawn cultivars of Poa
pratensis: Alicja, Bila, Limousine and Conni. Before sowing the seed material was irradiated with
green light of laser diode three times for 30 seconds. Phosphorus-potassium fertilization was used
once in autumn. Nitrogen fertilization was applied in autumn in a single dose of 30 kg/ha and in two doses early in spring and autumn in the amounts of 90 kg/ha (60 and 30), 120 kg/ha (60 and 60), 120 kg/ha (90 and 30) and 150 kg/ha (90 and 60). The research aimed at determining the effect of pre-sowing stimulation of four Poa pratensis lawn cultivars with a laser diode and diversified nitrogen fertilization on seed yield. Moreover assessed were the number of plants per 1 m2,
the length and width of panicles and effectiveness of seed settling in spikelets.
Nitrogen fertilization, in a dose of 120 kg/ha, divided into two equal parts and applied early
in spring and in autumn, and irradiation (3 × 30 s) most favourably affected generative shoot density per m2, effectiveness of seed settling in spikelets, as well as significantly modified the length and width of generative shoots. Alicja, Conni, Limusine and Bila best responded to the above mentioned factors by increasing the number of plants per 1 m2, respectively by 95, 94, 71 and 58%. Average effectiveness of seed settling in spikelets under the influence of the two factors was
between 76 and 78%. Only mineral fertilization positively influenced the effectiveness of seed
settling in spikelets only to the level of 120 kg/ha applied in doses divided into two equal parts.
Nitrogen fertilization and irradiation also diversified seed yield. The highest seed yields were
obtained after 3 × 30 s pre-sowing irradiation of kernels, combined with nitrogen fertilization
dosed 120 kg/ha, divided into 60 and 60 kg/ha for Bila and Conni and 90 and 30 kg/ha for Alicja and Limousine.
Keywords
Citation
Grygierzec, B. (2009). Wpływ nawożenia azotem oraz naświetlania na wielkość plonu nasion czterech gazonowych odmian Poa pratensis. Łąkarstwo w Polsce, 12, 61-71.