Pomoću indeksa poljskog nicanja (FEI = poljsko nicanje/standardna klijavost x 100) u radu je prikazana veza standardne klijavosti (SG) i poljskog nicanja (FE) soje. Indeks je promatran pod utjecajem nekoliko važnih činitelja vigora sjemena soje: kultivara, starosti i tretmana sjemena fungicidom kao i različitih uvjeta u sjetvi. Rezultati ispitivanja upućuju na to da sjeme odgovarajućeg vigora (SG≈85%) ima podudarne vrijednosti SG i FE (SG≈FE, FEI≈1 00). U tom slučaju SG precizno je predviđala FE, a prilikom sjetve takvog sjemena nije bilo rizika ukoliko sjeme nije tretirano fungicidom prije sjetve ili ako je sjetva obavljena u manje povoljnim uvjetima u polju. Nasuprot tomu, kod sjemena reduciranog vigora (SGFE, FEI= 40-100), tj. postojala je velika mogućnost smanjenog FE u odnosu na SG. Međutim, prilikom korištenja ovakvog sjemena, tretman sjemena fungicidom i sjetva u povoljnijim ekološkim uvjetima značajno su pridonijeli tomu da se u poljskim uvjetima ponove rezultati iz laboratorija (SG≈FE, FEI≈100). Ovo saznanje može značajno smanjiti rizik u sjetvi i pridonijeti postizanju odgovarajućih sklopova biljaka u polju.In the paper are presented relationship between standard germination (SG) and field emergence (FE) with field emergence index (FEl= field emergence/ standard germination x 100). Index was showed under influence of few important factors of seed vigor: cultivar, seed age and seed treatment as well as different seedbed conditions. Results showed that the seed with optimal vigor (SG≈90%) has very similar SG and FE values (SG≈FE, FEI≈100). That means that during the sowing of such seed, there was no risk if we use untreated seed or if there are unfavorable field conditions. On the contrary, by seed with reduced vigor (SGFE, FEI=40-100), there was a very great possibility of reduced FE. lf we use such seed, fungicide seed treatment and sowing in optimal seedbed conditions can significantly contribute to the repetition of laboratory results in field condiitons (SG≈FE, FEI≈100). This knowledge can significantly reduce risk in sowing and contribute to improvement of soybean seed performance and stand establishment
