Effect of biostimulators on root length and shoot length of seedlings of sunflower parent lines

Abstract

The aim of this paper was to examine the effects of biostimulators on root and shoot length of sunflower seedling deriving from seeds treated with biostimulators prior to sowing. Experiment was conducted at the Institute of Field and Vegetable Crops on five cytoplasmic male sterile lines: OCMS: - 98 (L1), HA-NS-26 (L2), PH-BC2-74 (L3), VL-A-8 (L4), and HA-26-PR (L5). The seed was produced in the period from 2010 to 2012. Two seed variants were tested - non-treated seed and seed which was prior to application of biostimulators treated with metalaxyl-m. Prior to sowing, seed was treated with commercial preparations Slavol S, Bioplant Flora and the combination of the two. Results of this research point out that application of appropriate biostimulator has positive effect on growth and development of roots and shoots of seedling, while inadequate combination of biostimulators leads to inhibitory effect.

Cilj rada bio je da se ispita kako biostimulatori deluju na dužinu korena i nadzemnog dela ponika kada se pre setve njima tretira seme. Testiranje je sprovedeno u novosadskom Institutu za ratarstvo i povrtarstvo na semenu pet citoplazmatski muško sterilnih linija suncokreta: OCMS- 98 (L1), HA-NS-26 (L2), PH-BC2-74 (L3), VL-A-8 (L4) i HA-26-PR (L5) koje je proizvedeno u periodu od 2010.-2012. godine. Testirane su dve varijante semena: netretirano seme i seme koje je pre primene biostimulator a tretirano metalaksilom-m. Seme je pre setve tretirano komercijalnim preparatima Slavol S, Bioplant Flora i njihovom kombinacijom. Rezultati ovog istraživanja ukazuju da primena adekvatnog biostimulatora utiče pozitivno na rast i razvoj korena i nadzemnog dela ponika dok neadekvatna kombinacija biostimulatora dovodi do inhibitornog delovanja. Tretiranje semena pre setve preparatom BIOPLANT FLORA pokazalo je dobre rezultate obzirom da je koren ponika duži u proseku za 2,4 cm kod varijante koja je tretirana ovim preparatom odnosno za 2,2 cm kod varijante semena gde je osim biostimulatora upotrebljen i fungicid na bazi metalaksila-m. Ovaj preparat je imao najbolji uticaj i na dužinu nadzemnog dela ponika povećavši ga u proseku za 1,5 cm odnosno za 1,2 cm u odnosu na kontrolnu varijantu.