The objective of this study was to investigate the influence of seed coat colour on the seed quality of four red clover cultivars (germination, dormancy (hard seeds) REZIME Cilj istraživanja bio je da se ispita uticaj boje semena četiri sorte crvene deteline proizvedene u Srbiji tokom dve godine na njihov kvalitet (klijanje, dormantnost (tvrdo seme), mrtvo seme i početni porast klijanaca (vigor)). U ovom istraživanju su prvo vizuelno razdvojena semena po boji, a zatim su razdvojena digitalnim kolor separatorom na svetla, tamna i mešovita. Rezultati su pokazali da

Potential of Trichoderma harzianum IS005-12 (TH-IS005-12) to promote seed germination and seedling growth of Italian ryegrass (IRG) forage was evaluated in vitro. Non-desiccated seeds and those pre-harvestly desiccated with total herbicide were treated 25 days (freshly harvested) and 178 days after harvest (mature) with TH-IS005-12 spore suspensions at 0 (T0), 1.8 × 10⁷ (T1) and 1.2 × 10⁹ (T2) spore/mL. TH-IS005-12 promoted the early and final germination and seedling growth in all non-desiccated and desiccated, freshly harvested as well as mature IRG seeds. It was more effective in pre-harvestly desiccated freshly harvested seeds where T2 treatment increased final germination rate for 24%, root number per seedling 1.6-fold and seedling vigour 1.9-fold compared to the untreated control. Moreover, TH-IS005-12 showed an inhibitory activity against seedborne fungi Alternaria alternata and A. ventricosa suppressing their growth in vitro by 82% and 77%, respectively.

The paper presents the results of four seed lots produced in Serbia and Belarus in two years, and examines the influence of their quality on 1000 seed mass, germination energy and total germination. There was no impact of the region or the year on the studied seed quality parameters. There was high variability of 1000 seed mass (CV = 20.3 %) taken from different seed lots of Italian ryegrass. Lower variability was found for germination energy and total germination (CV = 9.88 % and CV = 7.98 %). Ryegrass seed lots had lower variability for 1000 seed mass (CV = 8.34 %), germination energy and total germination (CV = 4.80 % and CV = 3.70 %). In the seeds of both species there was no significant correlation dependence of seed mass regarding germination energy and total germination. Significant influence was determined in both species between germination energy and total germination (P≤0. 001 and P≤0.05).Key words: Italian ryegrass; perennial ryegrass; quality seeds. REZIME Italijanski i engleski ljulj su značajne krmne i/ili ukrasne trave. U proizvodnji stočne hrane uglavnom se koriste u smeši sa leguminozama. Seme ovih vrsta se u Srbiji koristi delom iz proizvodnje u Srbiji, delom iz proizvodnje izvan Srbije (iz uvoza). Belorusija I Ukrajna se značajni proizvođači semena trava. Ma gde se proizvodnja semena odvijala kvalitet semena je od presudnog značaja za uspešno zasnivanje travnjaka i/ili travno-leguminoznih useva. U radu su prikazani rezultati ispitivanja po četiri partije semena proizvedenog u Srbiji I Belorusiji tokom dve godine I uticaj regiona proizvodnje na masu 1000 semena, energiju klijanja I klijavost. Nije utvrđen jasan zaključak o uticaju regiona proizvodnje (Srbija i Belorusija) I godine u kojoj se odvijala proizvodnja