Effect of desiccation date on oil content in sunflower seed

Abstract

The trial was conducted at Rimski Šančevi experimental field in 2009 in order to assess the effect of chemical desiccation on oil content in seed of three sunflower inbred lines (L1, L2 and L3). Reglone forte (2 l/ha) was used for desiccation. Desiccant application was performed at 7-day intervals from the end of f lowering to harvest maturity. Seed moisture content was measured prior to each treatment. Seed oil content was determined after harvest. The three lines showed highly significant differences in seed oil content. The highest oil content was found in L3, the lowest in L2. The highest oil content was obtained with the treatment done 21 days after flowering (DAF), when seed moisture was 45.6%. There was no subsequent increase in oil content. Regression analysis showed that the three lines achieved maximum oil content at different seed moisture levels at the time of desiccation (19% to 39%). .

Ogled je postavljen 2009. godine na Rimskim Šančevima sa ciljem da se ispita uticaj hemijske desikacije na sadržaj ulja u semenu kod tri roditeljske linije suncokreta. Desikacija je vršena preparatom Reglone forte (2 l/ha) svakih 7 dana od završetka cvetanja i oplodnje do žetvene zrelosti. Pre svakog tretmana utvrđena je vlažnost semena. Sadržaj ulja u semenu utvrđen je po dostizanju žetvene zrelosti. Između sve tri linije utvrđena je visoko značajna razlika u sadržaju ulja u semenu. Najviši sadržaj ulja utvrđen je kod linije L3, a najniži kod linije L2. Kod tretmana izvršenog 21 dan posle cvetanja (DPC), pri vlazi semena od 45,6 %, utvrđen je najviši sadržaj ulja, posle čega nije utvrđen rast sadržaja ulja. Regresionom analizom, kod sve tri linije, maksimum sadržaja ulja utvrđen je pri različitoj vlažnosti semena u momentu desikacije, od 19 % do 39 %. .