Effects of zinc, boron and sulfur on grain yield, activity of some antioxidant enzymes and fatty acid composition of rapeseed (Brassica napus L.)

Abstract

A field experiment was conducted to study the effects of elements zinc (Zn), boron (B) and sulfur (S) and their interactions on quantitative and qualitative agronomic characteristics of rapeseed. Minimum grain oil and seed yield were obtained from control treatments and the highest seed yield were obtained from S + B + Zn treatments. The maximum of oleic acid (229.6 mg g -1 ) and linolenic acid (27.14 mg g -1 ) were obtained from B + Zn + S treatment. Maximum of linoleic acid (55.55 mg g -1 ) were obtained from B + Zn treatment. However, the highest superoxide dismutase activity was obtained from S + B + Zn treatments 10.24 unit mg -1 and the highest peroxidase activity were obtained from Zn treatment 0.87 µmol g -1 FM min. Regard to this experiment results, application of B, S and Zn fertilizers with NPK fertilizer can help to increase the yield and yield components in rapeseed. Also fatty acids composition of rapeseed are influenced by nutrients and since quality of edible oils depends on unsaturated fatty acids, especially linoleic and linolenic acids and these acids are essential fatty acids for the human body that must be supplied through diet. Therefore this research showed that we are not only able only to increase oil yield but also oil quality with desired fatty acid composition. Izveden je bil poljski poskus za preučevanje učinkov Zn, B in S ter njihovih interakcij na količinske in kakovostne agronomske lastnosti oljne ogrščice. Najmanjša pridelka zrnja in olja sta bila dobljena v kontrolnem obravnavanju in največja pri obravnavanju S + B + Zn. Največ oleinske (229.6 mg g -1 ) in linolenične kisline (27.14 mg g -1 ) je bilo pri obravnavanju B + Zn + S. Največ linolenične kisline (55.55 mg g -1 ) je bilo doseženo pri B + Zn obravnavi. Največja aktivnost superoksid dizmutase je bila pri S + B + Zn obravnavi (10.24 enot mg -1 ) in največja aktivnost peroksidaze pri obravnavi samo s cinkom (0.87 µmol g -1 FM min). Glede na rezultate raziskave sklepamo, da uporaba B, S in Zn gnojil s NPK gnojili lahko pomaga povečati pridelek in njegove dele pri oljni ogrščici. Gnojila vplivajo tudi na sestavo maščobnih kislin v olju, kar vpliva na kakovost jedilnega olja, ki je odvisna od vsebnosti nezasičenih maščobnih kislin, predvsem linoleične in linolenične, ki sta za človeka esencialni in jih mora dobiti s hrano.V tem pogledu je raziskava pokazala, da nismo sposobni le povečati pridelka olja ampak tudi dosegati željeno sestavo maščobnih kislin v njem.

Fatty Acid Composition of Sesame (Sesamum indicum L.) Seeds in Relation to Yield and Soil Chemical Properties on Continuously Monocropped Upland Fields Converted from Paddy Fields

“…On the other hand, the high values of saturated fatty acids, especially lauric and myristic acids in the short duration of continuous monocropping of fields A and B, could be partly explained by the high N-P-K levels in the soil. Fertilizer management influences fatty acid composition since it directly affects soil nutrients [11,44,45]. In our study, soil total N was the highest in the short duration continuously monocropped fields A and B but had high saturated fatty acid contents, suggesting that adequate N partly increased synthesis of saturated fatty acids.…”

Erucic acid concentration of rapeseed (Brassica napus L.) oils on the German food retail market

“…In addition, selenium and sulfur also appear to have an influence on erucic acid concentration. Thus, fertilization with the two selenium forms selenite and selenate as well as with sulfur significantly reduced the erucic acid concentration of low erucic acid oilseed rape varieties (Davoudi et al., 2019; Liu et al., 2017; Shoja et al., 2018).…”

Assessment of Micro and Secondary Nutrient Combinations for Yield, Yield Attributes, and Economic Profitability of Mustard in Mid Indo-Gangetic Plains of Bihar

“…The zinc micronutrient increases photosynthesis rate and improves leaf area duration; thus, seed yield will be increased. Zinc plays an important role in tryptophan biosynthesis [29].…”

“…However, the highest polynomial correlation value wa obtained between seed yield & net return (R 0.68), followed by stover yield & seed yield (R 0.49) and the number of seeds/silique & stover yield (R 2 = 0.38). Among the SOC and available nutrients, the highest polynomial correlation value was found between SOC & available sulphur (R 2 = 0.21) followed by available boron (R 2 = 0.10) and available zinc (R 2 = 0.03) under mustard cultivation.This beneficial effect might be due to the interaction effect of sulphur, zinc, boron and their role in the synthes metabolism of auxin and formation of chlorophyll synthesis [29].…”