Effect of Antioxidants and Potassium on Productivity of Sunflower in Sandy Soil

Abstract

uring two summer seasons of 2015 and 2016, the influence of antioxidants application and potassium levels on productivity of sunflower was estimated under sandy soil conditions. Antioxidants (nil antioxidants; tap water only; vitamin E, 50 ppm; vitamin C, 100 ppm; citric acid, 500 ppm and vitamin E + vitamin C + citric acid at the same levels used individually for each). Potassium levels included 0, 24, 36 and 48 kg K 2 O/feddan (0.42 hectar). Results showed that both antioxidants application and potassium levels treatments had remarkable effects on plant height, head diameter, number of seeds/head, 1000 seed weight, seed and oil yields as well as percentages of harvest index, shelling, seed protein and seed oil in both seasons. Maximum values of such tested traits were commonly recorded with using vitamin E + vitamin C + citric acid. Increasing potassium level from 0 to 48 kg K 2 O/feddan caused significant increases in all traits of sunflower plants and the highest values were obtained at 48 kg K 2 O/feddan in both seasons. All studied traits were significantly affected by the interaction between antioxidants application and potassium levels, except harvest index and seed protein percentage.

Study the Response of Five Canola Cultivars to Foliar Spraying by some Antioxidants

“…by, Citric acid. This results in agreement with those reported by Sakr andArafa (2009), El-Sabagh et al (2017) and the similar trend was found in sunflower by Salem and Shoman (2018). Where: * and ** mean significant at 5 and 1 % level of probability, respectively.…”

“…This increase may be due to increasing all yield attributes under this study by antioxidants foliar spray especially, Citric acid. These results are in the same trend with those reported by El-Sabagh et al (2017), and Salem and Shoman (2018).…”

“…This could be due to improvement number of fertile flowers and translocation of metabolites products to seed. These findings are in the same trend with those reported by Nehal et al (2017) and Salem and Shoman (2018). Where: * and ** mean significant at 5 and 1 % level of probability, respectively.…”

“…Nehal et al (2017) pointed that foliar application of plant growth regulators improved all the growth (plant height and number of branches/plant) and the yield and yield attributing characters under normal and drought conditions. Salem and Shoman (2018) showed that antioxidants application had remarkable effects on plant height, head diameter, number of seeds/head, 1000-seed weight, seed and oil yields as well as harvest index, shelling, seed protein and seed oil percentages of sunflower plants.…”

Optimizing Potassium and Iron Levels for Enhanced Sunflower Yield in Peshawar Valley

“…While certain fatty acid concentrations remained unaffected, potassium-deficient sunflowers exhibited reduced yield and oil content. Salem (2018) reported that potassium treatment significantly improved sunflower growth parameters, with the highest values observed at 48 kg ha-1 K. Capitulum diameter, seed number per capitulum, and seed yield were highest at this potassium level. Antioxidant treatment and potassium levels interaction influenced most attributes, except for harvest index and seed protein %.…”