In order to investigate the effect of vermicompost (VC) application on amount of micro elements in soil and plant organs of the medicinal plant of Borage (Borago officinalis), an experiment was carried out in split plot based on complete randomized block design with three replications in the research farm of the Sari University of Agricultural Science and Natural Resources. fertilizer treatments include two levels (20 and 40 tons per hectare) of VC, mix VC and fertilizers, fertilizers, (fertilizers include 100 kg/hac potassium sulfate, 100 kg/hc super phosphate and 150 kg/hc urea) and control (without fertilizer and vermicompost) and years of consumption: 2006, 2006 and 2008, 2006 and 2007, 2006, 2007 and 2009, 2006, 2007 and 2008 and 2006, 2007, 2008 and 2009. The results showed that fertilizer treatments had a significant effect on the rate of micro-elements in soil and plant. The years of consumption of fertilizer had a significant effect in all cases except the rate of Cu in the leaves and on the rate of Cu and Mn in petal. The interaction between the years of fertilizer consumption and fertilizer treatments on the rate of micro-elements absorbant in the soil were significantly different, where as significantly affected the Fe in the leaves and petals only. In conclusion, using vermicompost is recommended as an organic fertilizer.


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