(Mentha piperita) اثر محلولپاشی نانوکالتهای آهن، پتاسیم، کلسیم و منگنز بر برخی خصوصیات مورفوفیزولوژیکی و جذب عناصر غذایی گیاه نعناع فلفلی.

Owing to the importance of using nanotechnology in sustainable agriculture to increase the quantitative and qualitative yield of agricultural products, this study aimed to investigate the effect of foliar application of iron, potassium, calcium, and manganese nanoparticles on some morphophysiological traits and nutrient uptake of peppermint (Mentha piperita L.), a main medicinal plants of the Lamiaceae family, in a completely randomized design with three replications in a greenhouse located in Islamshahr during 2018. Foliar application treatments of iron, potassium, calcium, and manganese nano-chelates included three levels of 2, 4, and 6 mg/L. The foliar treatments were applied in three stages with one week intervals, and sampling was performed to evaluate the traits two weeks after the last treatment. Results showed that the application of nano-chelates significantly increased the evaluated traits compared to the control. The application of iron nano-chelate at 6 mg/L increased fresh and dry weights of shoot and total chlorophyll and iron contents while the highest concentration of essential oil was observed in the treatment with iron nano-chelate (4 mg/L). Also, the highest fresh and dry weights of roots and potassium content were obtained in the treatment with potassium nano-chelate (6 mg/L). Moreover, concentrations of phenol and manganese increased with the applying manganese nano-chelate (6 mg/L), the flavonoids and vitamin C contents increased with applying manganese nano-chelate (4 mg/L), and the highest level of calcium was observed in calcium nano-chelate (6 mg/L) treatment. In sum, according to the results of this study, the application of iron, potassium, calcium, and manganese nano-chelates with concentrations of 4 and 6 mg/L had a positive effect on increasing the productivity of peppermint. [ABSTRACT FROM AUTHOR]