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Effect of plant density and foliar application of salicylic acid on agronomic traits and seed yield of rapeseed (Brassica napus L.) genotypes
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Farnaz Ganj abadi   , Amir hossein Shirani rad , Behzad Sani , Hamid Mozafari |
| Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran |
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Abstract: (1903 Views) |
| To investigate the effect of plant density on agronomic traits of winter rapeseed (Brassica napus L.) cultivars under foliar application of salicylic acid a factorial split-plot arrangement in randomozide complet block design with three replications was carried out in Karaj, Iran, in two cropping seasons (2015-2017). Plant density at three levels of 40, 50 and 60 plants.m-2 and salicylic acid at two levels of 0 (non-application) and application with a concentration of 1‰ in two stages of 6 leaf and stem elongation were assigned in main plots and rapeseed genotypes; HW118, WPN6, HL3721, L14, Tassilo and Natali were randomized in sub-plots. The Plant density × salicylic acid × genotype interaction effect was significant (P≤0.01) on plant hight, number of silique on the main stem and branches, seed number of silique on the main and branches, 1000-seed weight, seed yield, oil yield, biological yield and total chlorophyll content. This interaction effect was also significant (P≤0.05) on seed oil content. All rapeseed genotypes showed positive responses to foliar application of salicylic acid at different plant densities, and L14 and Natali genotypes in 40 plants.m-2 and application of salicylic acid had the highest seed yield (5629 and 5448 kg.ha-1), oil yield (2444 and 2352 kg.ha-1) and 1000 seed weight (5.3 and 5.1 g), respectively. Therefore, for rapeseed production, especially in low densities (40 plants.m-2), foliar application of salicylic acid is suitable for increasing seed yield. |
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| Keywords: Chlorophyll content, Rapeseed, Seed yield, Seed oil Content and 1000 seed weight |
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Full-Text [PDF 670 kb]
(963 Downloads)
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Type of Study: Scientific & Research |
Subject:
Special
Received: 2020/07/7 | Accepted: 2020/11/8 | Published: 2021/05/31
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