The Effect of Brassınolıde on the Yıeld Components, Seed and Oıl Yıelds of some Sunflower Cultıvars

Abstract

The field experiment was carried out in the spring season of 2019 in the Research Station at the College of Agriculture, University of Anbar.This experiment was aimed to study the effect of spraying different concentrations of Brassinolide (0, 0.5, 1, 1.5 mg L -1 ) on the yield and quality of three vareities of sunflower (Ishaqi 1, Akmaar, and Sakha). The experimental design was split-plots experiment under the Randomized Completely Block Design (RCBD) with three replicates. The three vareities were distributed in the main-plots and the concentrations of Brassinolide were distributed in the sub-plots. A significant effect of the cultivars and the concentrations of the Brassinolide on the studied response variables. The sprayed plants with 1.5 mg L -1 concentration achieved highest number of seeds per disc (833 seed disc -1 ), weight of 1000 seeds (65.08 g), percentage of fertility in the seeds (93.89%), total seed yield (3573 kg ha -1 ) and oil yield (1586 kg ha -1 ). The vareities were significantly different for all studied traits. Sakha cultivar recorded the highest values for the number of seeds per disc, the percentage of fertility in the seeds, the total yield of seeds and the oil yield (708 seed disc -1 , 93.05%, 2810 kg ha -1 , 1217 kg ha -1 , respectively), whereas Ishaqi 1 was superior in terms of the weight of 1000 seeds (61.33 g) and Akmaar was superior in terms of oil content (46.16%). Sakha cultivar was the most responsive to the addition of Brassinolide and achieved a high average for the seed yield and oil.

Response of Qualitative Traits of Sunflower Helianthus annuus (L.) Cultivars to Spraying with Glycine Acid

“…Akmar cultivar outperformed in both seasons with an average content of unsaturated oils was 72.32% and 73.67% respectively, with a significant difference from the cultivars Sakha and Luluah, which gave an unsaturated oil percentage was 71.37% and 70.79% respectively in the first season and 72.82% and 72.26% respectively in the second season. These results are consistent with those found by Al-Subaihi [7] and Hamed [8].…”

“…In the second season, the same cultivar Akmar gave the highest linoleic acid content was 29.33%, with a significant difference compared to Sakha and Luluah, which gave a linoleic acid content was 28.53% and 28.09%, respectively. These results are consistent with those obtained by Al-Subaihi [7] and Hamed [8], who found significant differences in the effect of cultivars on the linoleic acid content in oil.…”

“…The Akmar cultivar outperformed and gave the highest oleic acid percentage in the oil for both seasons, was 42.36% and 42.71%, respectively, with a significant difference from the Sakha and Luluah cultivars, which had oleic acid percentages was 41.60% and 39.08% respectively, in the first season, and 41.58% and 39.14%, respectively, in the second season. Similar results were obtained by Al-Subaihi [7] and Hamed [8].…”

“…The superiority of the cultivar Akmar in the percentage of unsaturated fatty acids compared to the cultivar Luluah resulted in the superiority of the cultivar Luluah in the percentage of saturated fatty acids, including stearic acid, due to the strong genetic correlation between these fatty acids in the cultivars studied. Similar results were obtained by Al-Subaihi [7] and Hamed [8].…”

Quantifying plant biomass and seed production in camelina (Camelina sativa (L.) Crantz) across a large range of plant densities: Modelling approaches

“…To date, many researchers used several mathematical models (i.e., power, exponential, segmented, etc.) for describing the effect of plant density on plant biomass (Soltani et al, 2011), allometric relationships (Zafari Ghalehrodkhani et al, 2017), extinction coefficient and radiation use efficiency (Zahed et al, 2013), biomass (Khan et al, 2020) and yield (Zahed et al, 2011). For example, Soltani et al (2011) fitted a power model to quantify seed production of volunteer canola ( Brassica napus ) and wild mustard ( Sinapis arvensis ) as a function of their plant biomass.…”