The effect of vegetation area size on Italian ryegrass (Lolium Italicum A. BR.) seed yield

Abstract

This paper surveys sowing norms (row spacing and seed rate) in both our country and the world, as well as the optimal seed rates in Italian ryegrass seed production. It gives a short overview of row spacings and seed rates applied in our and some other countries. Earlier, grass cultivated for the purpose of seed production was grown on small vegetation area. According to some researches high seed yields can be achieved by cultivating grass on large vegetation area. Based on the results obtained it can be concluded that the highest Italian ryegrass seed yield in Serbian conditions was achieved with plants grown in 15-20 cm spaced rows employing 15-20 kg ha-1 of seeds.

Ovaj rad daje pregled načina setve (međurednog rastojanja i setvene norme) kako u našoj zemlji, tako i u svetu, kao i optimalne količine semena koje se mogu postići u proizvodnji semena italijanskog ljulja. Dat je i kratak pregled veličina međurednih rastojanja i količina semena za setvu u našoj zemlji i inostranstvu. Ranije se trava u cilju proizvodnje semena gajila na malim vegetacionim prostorima. Prema novijim istraživanjima, visok prinos semena se može postići gajenjem trava na velikom vegetacionom prostoru. Na osnovu postignutih rezultata može se zaključiti da se najveći prinos semena postiže u uslovima Srbije gajenjem biljaka na 20 do 40 cm međuredno i korišćenjem 15 do 20 kg ha-1 semena.