The Effect of Sewage Sludge Application on the Amount of Microelements in Soil and Absorption in Medicinal Plant Borage (Borago Officinalis eL.)

In order to investigate the effect of Sewage Sludge (SS) application on the amount of micro elements in soil and absorption of these elements in plant organs of medicinal plant borage (Borago Officinalis), an experiment was carried out in split plot based on complete randomized block design in three replications in the field of the University of Agricultural of Sari. fertilizer treatments were two leves 20 and 40 tons per hectare of sewage sludge, mix SS and fertilizer, fertilizer and control and years of consumption were inclusive: (1385), (1385 and 1387), (1385 and 1386), (1385, 1386, 1388), (1385, 1386 and 1387) and (1385, 1386, 1387 and 1388). The results of the study showed that fertilizer treatments, on the amount of absorbent micro-elements in the soil, leaves and petal of plant were significant. The years of fertilzer consumption on the all of the cases except amount of Zn and Mn absorbent in leaves of plant had a significantly effect. The interaction between years of consumption of fertilizers and fertilizer treatments on concentration of all of micro-element except Mn in the soil were significant, in the leaves had a significantly effect on the amount of Fe and Cu absorbent only and in the petal showed significant effect on the amount of Mn and Cu absorbent.