Response of two broccoli hybrids to spraying with selenium and brassinolide on some chemical properties

Abstract EN

The experiment was carried out during the agricultural season (2021-2022) in one of the agricultural fields at the village of Tarjeel, Laylan district, Kirkuk governorate, and the experiment included the study of three factors, where the first factor was spraying with the element selenium in concentrations (20, 30, 40 mg l-1), the second factor was spraying with the hormone brassinolide in concentrations (50, 100, 150 mg.l⁻¹) and the third factor was consisted of two hybrids (Paraiso and jassmine f1).

the plants were sprayed in two batches, the first spray was 20 days after planting the seedlings on September computer, 2021 and the second spray was 20 days after the first spray.

the experiment had three replicates, each with14 experimental units.

the experiment was conducted according to the split plot design system within the R.C.B.D.

the data were analyzed statistically according to the least significant difference L.

S.

D.

and Duncan’s multiple range test (p ≤ 0.05) to compare the averages.

1.

the results showed that spraying with the element selenium was not significantly effective, while the hormone brassinolide at a concentration of (100 mg l⁻¹) was significantly superior in the characteristics of fresh and dry weights of the shoot, which amounted to (1.625 and 0.300 g), respectively, also the superiority of the brassinolide concentration (150 mg.l⁻¹) was significant in the characteristics of percentages of carbohydrates, nitrogen, protein and selenium in the pink tablets with (7.528, 2.274, 14.065 and 0.207%), respectively.

2.

it was revealed that jassmine f1 hybrid was significantly superior, especially in the traits of shoot fresh weight (1.244 g), shoot dry weight (0.291 g), and the percentage of carbohydrates in the pink discs (6.789%), while Paraiso hybrid was only significant in the trait of main disc fresh weight (0.756g).

3.

the bilateral interaction between Paraiso hybrid and spraying with brassinolide at 150 mg l-1 gave the superiority in shoot fresh weight (1.623 g), while the interaction between Paraiso hybrid and selenium at 40 mg.l-1 caused the superiority in shoot dry weight (0.329 g), whereas the hybrid jassmine f1 interacted with selenium at 40 mg.l-1 led to the superiority of weight of the main disc of the pink discs (0.930 g).