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.

The nutrients and organic matter in organic amendments provide a valuable resource to agriculture, forestry and remediation of degraded lands. The objective of this research was to investigate the effects of two wheat cultivars (cv. Backcross and Alvand) on zinc (Zn) uptake in a loamy soil amended with organic and inorganic Zn sources. A factorial experiment using randomized complete blocks was used in three replications. A Zn enriched cow manure (800 mg Zn kg-1) was applied to the soil at three rates of 25 (V 1), 50 (V 2), and 100 Mg ha-1 (V 3). To compare the effects of organic and inorganic sources, similar rates of Zn as zinc sulphate (ZnSO 4) were also applied (Zn 1 , Zn 2 and Zn 3 , respectively). An untreated soil sample was considered as control soil (V 0). In general, cultivation of wheat plant (cv. Backcross) resulted in a lower Zn uptake relative to the Alvand cultivar. However, the plants Zn concentration of both cultivars depended on the rate and type of the applied manure (organic or inorganic sources). Both cultivars showed that plants grown in soil treated with ZnSO 4 accumulated significantly greater Zn in their root tissue compared to those grown in soil treated with cow manure. A significant increase in the shoot, spike and root Zn concentration was observed as the loading rate of cow manure increased. The results of this experiment point to the fact that the source of fertilizer, type of the plant and the loading rate of Zn are important factors in determining Zn phytoavailability.

No abstract

No abstract

No abstract