تأثیر اسید هیومیک بر کارایی نانوکود آهن در جذب عناصر کم مصرف توسط گیاه کلزا

Iron for its role in the structure and activity of enzymes such as Catalase , Peroxidase and Cytochrome oxidase is an important element in the process of nitrogen fixation, on the other hand, as iron is a part of catalysts group in many oxidation and reduction enzymes, Iron is considered an important factor in the absorption of other elements by plants. The aim of this research was to study the efficiency of nano iron fertilizer on vital activities and micronutrients concentrations in Brassica napus. A completely randomized design experiment was carried out with three levels of humic acids (0, 600, 900 mg/3 kg soil), and 1.5 g nano iron fertilizer / 3 kg soil with three replications. Results showed that plant Zn concentration in humic acid treatment of 600 and plant Cu concentration in humic acid treatment of 900 mg/ 3kg soil levels along with 1.5 g nano iron fertilizer/3 kg soil showed higher concentrations, with significant increase compared to other treatments. Plant Mn concentration also in both 900 and 600 mg/3 kg soil along with 1.5 g nano iron fertilizer/3 kg soil was increased significantly. Plant Fe concentration in both 900 and 600 mg/3 kg soil along with 1.5 g nano iron fertilizer/3 kg soil was increased significantly compared to 0 level humic acid +1.5 g nano iron fertilizer/3 kg soil. This effect obviously, indicates increasing nano iron fertilizer efficacy on the presence of the humic acid compared to soil treated with same amount of nano iron fertilizer but without
humic acid application.