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The present study aimed to evaluate the method of using iron on the physiologic characteristics of speedfeed sorghum and plasma membrane stability index (PMSI). Therefore, a factorial experiment was conducted in a completely randomized design with three replications. In addition, Zn, Cu, Mn were added to the soils before planting in order to avoid the shortage of micronutrients and find the possible effects of Fe nano materials sources on their sorption. The treatments were done based on two levels of iron including soil application (0.270, 0.405 mg kg-1 of soil) and foliar application (0.25 and 0.5 g of iron per liter with control) from four compost sources including iron oxide nanoparticles, monodisperse iron oxide nanoparticles, polymeric iron oxide nanoparticles, and polymeric monodisperse iron oxide nanoparticles. The results of the interaction among the procedure, level and sources of iron indicated that the concentration of iron in shoots and the concentration of zinc in roots haves increased in polymeric iron oxide nanoparticles and monodisperse iron oxide nanoparticles at 0.270 mg kg-1 level while manganese concentration of shoots, and PMSI of roots were significantly increased in the treatments of polymeric monodisperse iron oxide nanoparticles and iron oxide nanoparticles at 0.405 mg kg-1 level, compared to the control group. In foliar application of iron resources, the amount of total chlorophyll in monodisperse iron oxide nanoparticles and the percentage of PMSI of leaf, concenteration of Cu, Fe and Mn of roots in polymeric monodisperse iron oxide nanoparticles have significantly increased at the level of 0.25 g L-1 while the concentration of Zn in shoots in iron oxide nanoparticles have significantly increased at level of 0.5 g L-1, in comparison to the control sample. Simple, dual, or triple interaction effects of procedure, source and level of iron were not significant in copper concentration of shoots.

journal of soil science and plant nutrition

A comparison of the use of different sources of nanoscale iron particles on the concentration of micronutrients and plasma membrane stability in sorghum