MANAGEMENT PRACTICES EFFECT ON SEED FEATURES OF ITALIAN RYEGRASS FOLLOWING STORAGE PERIOD

Italian ryegrass seed crop was established in 2007 with two sowing densities (D1 = 60 cm row spacing and 5 kg ha-1 seeding rate; D2 = 20 cm row spacing and 20 kg ha-1 seeding rate) and using two spring nitrogen rates (0 and 150 kg N ha-1). Seed germination and thousand seed weight (TSW) of Italian ryegrass was observed in first production year. After harvest in June, seeds were stored under standard storage conditions and sampled 90 days after harvest (DAH), and then 2000 DAH. At 90 DAH, seeds were tested for TSW, as well as germination energy and total germination percentage at incubation temperatures of 10, 15, 20 and 25°C. Ryegrass seeds had the best germination energy 90 DAH at 20°C and maximum total germination at 15°C, which implies that early autumn (September-October) is proper sowing period for freshly harvested seeds of Italian ryegrass. Italian ryegrass seeds could maintain satisfactory germination energy (59.3%) and total germination (77.3%) up to 2000 DAH. High seed quality was obtained and applied treatments did not change seed quality significantly unlike storage period which had considerable influence on seed quality. The data can serve for the determination of a proper storage duration management between harvest and sowing of the tested species under ambient conditions of Serbia. [Projekat Ministarstva nauke Republike Srbije, br. TR 31053 i br. TR 31016]

[1]  R. Stanisavljević,et al.  Acid and temperature treatments result in increased germination of seeds of three fescue species. , 2012 .

[2]  V. Stevović,et al.  Seed germination and seedling vigour of italian ryegrass, cocksfoot and timothy following harvest and storage , 2011 .

[3]  Svetlana,et al.  Fodder Crops and Amenity Grasses Section Meeting , 2011 .

[4]  J. Milenković,et al.  Short communication. Effects of the duration of after-ripening period on seed germinations and seedling size in three fescue species , 2010 .

[5]  T. Ćupina,et al.  Impact of management practices on Italian ryegrass seed quality. , 2010 .

[6]  D. Sokolović,et al.  The impact of seeding rate and inter-row spacing on Italian ryegrass for seed in the first harvest year , 2009, Turkish Journal of Agriculture and Forestry.

[7]  M. Khosh-khui,et al.  Enhancing Seed Germination Rate of Four Turfgrass Genera by Acid Treatments , 2005 .

[8]  C. Walters,et al.  Longevity of cryogenically stored seeds. , 2004, Cryobiology.

[9]  R. Stanisavljević,et al.  The effect of vegetation area size on grass seed yield , 2003 .

[10]  J. Hampton,et al.  Seed quality of grasses and legumes. , 1998 .

[11]  K. Thompson,et al.  Seeds: Physiology of Development and Germination , 1986 .

[12]  J. Hampton.  Effect of seed and seed lot 1000-seed weight on vegetative and reproductive yields of ‘Grasslands Moata’ tetraploid Italian ryegrass (Lolium multiflorum) , 1986 .

[13]  E. Bean,et al.  The effects of density, date of inflorescence emergence, date of harvesting and temperature upon seed quality in tetraploid hybrid ryegrasses , 1980 .