Influence of sowing rate on Fidel stand and yielding of turfgrass cultivars of red fescue (Festuca rubra L.) grown for seed
Danuta Martyniak
d.martyniak@ihar.edu.plSamodzielna Pracownia Traw i Roślin Motylkowatych, Instytutu Hodowli i Aklimatyzacji Roślin w Radzikowie (Poland)
Abstract
Four cultivars representing two subspecies of red fescue were sown in a field experiment conducted in 2002–2004 in Radzików. Influence of sowing rate on real field stand, plant tillering and installation, as well as on seed yield was investigated. Theoretical sowing rate of 500 plants per 1 m2 (W2) in seed production, and even of 250 plants per 1 m2 (W3) in the case of stoloniferous forms, were found to be optimal. The sowing rate used so far, ranging from 770 to 1145 plants per 1 m2 (W1) depending on varietal differences in thousand seeds weight (TSW), appeared to be excessive. The real field stand was measured as field emergence index (PWW). Depending on sowing density, this index varied from 30% to 45% of the theoretical field stand established on the basis of germination capacity and varietal TSW. In general, seed yielding was affected most considerably by field stand in the year of sowing, determined by plant installation index (WIR). The higher seed yields in spite of the lower sowing rate and lower plant density were the effects of more intensive tillering (up to 30 shoots per plant) as well as of the increased TSW, ear length and ear weight.
Keywords:
Festuca rubra, field stand, generative shoots number, panicle, seed yield, sowing rate, tillering, thousand seeds weightReferences
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Authors
Danuta Martyniakd.martyniak@ihar.edu.pl
Samodzielna Pracownia Traw i Roślin Motylkowatych, Instytutu Hodowli i Aklimatyzacji Roślin w Radzikowie Poland
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