Interactive Effect of Zinc Fertilization and Cultivar on Yield and Nutritional Attributes of Canola (Brassica napus L.)

Abstract

Zinc (Zn) is an important micronutrient for plants, but mostly, soils do not have enough amounts of Zn available. This necessitates the application of supplementary Zn for proper growth and development of plants. Canola is an important oilseed crop of the world, but its yield attributes, protein and oil contents, and fatty acid composition are always being investigated for improvement under various agroclimatic conditions, which was the major objective of this study. This 2-year field experiment was conducted to evaluate the efficiency of soil applied Zn and cultivars for yield attributes and seed oil quality of canola. Treatment included four canola cultivars viz., Faisal canola, Pakola, PARC canola, and Rainbow factorally combined with three zinc levels (0, 5, and 10 kg ha −1). Zn fertilization improved yield attributes and yield of the canola cultivars, but cultivars differed in their response to Zn fertilization. Rainbow cultivar produced 24-27% higher seed yield at 10 kg ha −1 Zn as compared with control treatment. In addition, Pakola cultivar attained 0.5-1.5% higher oil contents at 5 kg ha −1 Zn when compared with the control treatment. However, soil applied 5 and 10 kg ha −1 Zn did not show any significant influence on protein contents of all canola cultivars. Zinc fertilization increased the seed yield and yield components of canola cultivars and significantly enhanced the oil contents. Rainbow cultivar was found to be the most responsive to Zn fertilization regarding the seed yield and oil contents and its fatty acid composition and economic returns.

Characterizing Lentil Germplasm for Zinc Biofortification and High Grain Output

“…Genotypes differently respond upon application of Zn being grown on calcareous and alkaline soil which was deficient in plant available Zn (0.43 mg Zn kg −1 of soil) (Alloway 2008;Abid et al 2013;Maqsood et al 2015). Zinc application improved the plant growth and yield attributes (Alloway 2009;Bala et al 2019;Farouk and Al-Amri 2019;Manaf et al 2019). In present study, Zn had a significant effect on lentil growth, grain production and concentration of Zn in grains.…”

“…Crop genotypes greatly differ in grain Zn contents as well as the phytate contents (Hussain et al 2011(Hussain et al , 2013. Zinc application and cultivars both influence the yield and nutritional status of crop (Hidoto et al 2017;Manaf et al 2019). However, screening of the existing lentil germplasm for higher grain Zn contents and low phytate contents is desirable.…”

24-Epibrassinolide Improves Root Anatomy and Antioxidant Enzymes in Soybean Plants Subjected to Zinc Stress

“…Zinc is essential for plant growth (Sadeghzadeh 2013;Hafeez et al 2013) and plays important roles in essential processes, such as membrane biosynthesis, photosynthetic machinery, hormonal regulation, metabolism of lipids and nucleic acids, gene expression, and protein synthesis (Hänsch and Mendel 2009;Noulas et al 2018;Manaf et al 2019). Additionally, Zn is the single metal required in all six classes of the enzymes (oxidoreductases, transferases, hydrolases, lyases, isomerases and ligases) essential during photosynthesis processes and subsequent starch accumulation (Palmer and Guerinot 2009;Tripathi et al 2015).…”

Effect of Micro-Nutrients Foliar Application on Yield and Quality Traits of some Canola Genotypes Under Different Environmental Conditions تأثیر الرش الورقی بالعناصر الصغرى علی انتاجیة وجودة محصول بعض التراکیب الوراثیة من الکانولا تحت ظروف بیئیة مختلفة

“…Tavakoli et al (2014) mentioned that the effect of micro-nutrients is found in oxidation and reduction processes, as electron transport in photosynthesis (Mn), or a component of many enzymes associated with energy transfer, nitrogen reduction and fixation, and lignin formation (Fe) and have a catalytic, building, and activating role in the enzymes (Zn). The significant effect of micro-nutrients was reported by Afsahi et al (2020) on chlorophyll content, Manaf et al (2019 b) who found that Zn significantly improved plant height, number of siliques, 100-seed weight, biological and seed yields. Also, with increasing micro-nutrient levels grain yield, protein content, protein yield, percentage of iron and zinc were increased (Payandeh et al, 2020).…”

“…The genotype differences in many following traits i.e. chlorophyll content, plant height, number of branches and pods per plant, pod and seed dry weight, seed index, and biological, seed, oil, and protein yields were stated by Asfour (2013), Emam (2014), Tauseef et al (2017), Khan et al (2018), Manaf et al (2019 a and b), Shahsavari (2019), Afsahi et al (2020), Ashkiani et al (2020) and Nargeseh et al (2020). Micro-nutrients of manganese, iron, and zinc are considered important factors for the plant development, whether in the good or reclaimed soils by increasing the chlorophyll content, the efficiency of photosynthesis and improving the growth and yield characteristics by entering it directly or indirectly in many reactions in the plant.…”