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Title: Effect of soil and foliar application of zinc on grain zinc and cadmium concentration of wheat genotypes differing in Zn-efficiency

Author
item KHOSHGOFTARMANESH, A - Isfahan University Of Technology
item SANAIEOSTOVAR, A - Isfahan University Of Technology
item Chaney, Rufus
item AFIUMI, D - Isfahan University Of Technology
item AFYUNI, M - Isfahan University Of Technology
item TADAYYONNEJAD, M - Isfahan University Of Technology

Submitted to: International Symposium on Biogeochemistry of Trace Elements Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 4/14/2011
Publication Date: 7/4/2011
Citation: Khoshgoftarmanesh, A.H., Sanaieostovar, A., Chaney, R.L., Afiumi, D., Afyuni, M., Tadayyonnejad, M. 2011. Effect of soil and foliar application of zinc on grain zinc and cadmium concentration of wheat genotypes differing in Zn-efficiency. International Symposium on Biogeochemistry of Trace Elements Proceedings. On disk.

Interpretive Summary: .

Technical Abstract: A two-year field experiment was carried out to investigate the effectiveness of soil and foliar applications of zinc sulfate and soil application of waste rubber ash to increase Zn and decrease cadmium (Cd) concentration in grain of 10 wheat genotypes with different Zn-efficiency. Foliar spray of zinc sulfate at early anthesis, in general, had no significant effect on the yield and grain Cd content while significantly increasing Zn concentration in grain of most studied wheat genotypes. On average, foliar Zn treatment at the mid tillering stage (0.66 kg Zn/ha), decreased the mean Cd concentration in grain from 0.032 mg/kg for the nil treatment to 0.024 mg/kg. While grain Zn concentrations of some genotypes increased by soil application of zinc sulfate, concentration of Zn in grain of other genotypes was not affected or even decreased. For most studied wheat genotypes, pre-planting application of waste rubber ash in soil resulted in significant decrease of grain Cd concentration. The results from this study showed that the effectiveness of soil and foliar application of Zn on grain Zn and Cd content is greatly dependent on the wheat genotype. The current recommended rates of soil applications of Zn to ameliorate Zn deficiency are enough for some genotypes to increase Zn and decrease Cd concentration in grain. According to the results, the benefits of soil and foliar application of Zn to enhance Zn and reduce Cd concentration in grain are dependent on the wheat genotype. Soil application of 100 kg waste rubber ash/ha and foliar spray of 0.66 kg Zn/ha at tillering stage seem to be the most effective treatments to ameliorate Zn deficiency and to increase Zn and decrease Cd concentration in grain of most wheat genotypes.