Effect of NPK Fertilizer and Nano Iron on Growth and Glycosides Contents of Aloe vera L.

• Qasim A. S. Al-Zyadi

  Author

   To evaluate the effect of adding three concentrations of NPK fertilizer (0, 3, and 4.5 g L^-1) and spraying Nano-iron at four concentrations (0, 10, 20, and 30 mg L^-1) on growth indicators and the content of some anthraquinone glycosides in the leaves of Aloe vera L., a pot experiment was conducted in the wooden shelter of the College of Agriculture at Al-Muthanna University in Iraq, during the period 2024-2025, It was conducted using a Completely Randomized Design (CRD) with three replicates.. The results showed that plants treated with NPK fertilizer at a concentration of 4.5 g L^-1 were significantly superior in all studied traits, recording the highest values in plant height (34.91 cm), number of leaves (15.19 leaf plant^-1), leaf area (92.65 dm² plant^-1), fresh weight of shoot (281.5 g plant^-1), dry weight of shoot (14.48 g plant^-1), aloin content (62.24 mg g^-1) and emodin content (36.21 mg g^-1). The results also showed that the plants treated with Nano-iron at concentration (30 mg L^-1) were superior and gave the highest mean in plant height (31.48 cm), number of leaves (14.66 leaf  plant^-1), leaf area (80.53 dm² plant^-1), fresh weight of shoot (245.9 g  plant^-1), dry weight of shoot (12.77 g plant^-1), While the plants treated with Nano-iron concentration of 20 mg L¹ showed a significant increase in alion and emodin content  of their leaves, which reached (57.88 and 32.06 mg g^-1), respectively.

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