Management practices effect on seed features of Italian ryegrass following storage period
2014
Mandić, V. (Institute for Animal Husbandry, Belgrade (Serbia)) | Simić, A. (Faculty of Agriculture, Belgrade-Zemun (Serbia)) | Vučković, S. (Faculty of Agriculture, Belgrade-Zemun (Serbia)) | Stanisavljević, R. (Institute for Plant Protection and Environment, Belgrade (Serbia)) | Tomić, Zorica (Institute for Animal Husbandry, Belgrade (Serbia)) | Bijelić, Zorica (Institute for Animal Husbandry, Belgrade (Serbia)) | Krnjaja, V.
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.
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