Effect of micro-elements (Fe, Mn, Zn and Cu) on yield and quality of date palm

In order to determine the effect of micro-nutrient (Fe, Mn, Zn and Cu) with and without sulfur on yield and quality of date palm a complete randomized block design was conducted in Jahrom, Darab, Hajiabad, Minab and Bousher since 1997-2000. In Jahrom there were treatments consisting of 2 levels of sulfur (0 and 2 kg/tree), Zn, Mn and Cu – sulfates (400gr/tree), Fe-chelate (100 gr/tree) and control. In Darab there were six treatments (Fe-chelate 100g/tree), Zn, Mn and Cu Sulfates (400 gr/tree), Sulfur (500 gr/tree) and control. In Bandar Abbas there were five treatments (Fe- chelate 100g/tree), Zn, Mn and Cu Sulfates (400 gr/tree) and control. In Bousher there were six treatments (Fe- chelate 100g/tree), Zn, Mn and Cu Sulfates (400 gr/tree), combination of four treatments (Fe-chelate, Zn, Mn and Cu Sulfates) and control. Each treatment consisted of 2 tree with 3 replications. The water was applied in 2-day irrigation interval. The amount of macro-fertilizer was applied on soil analysis. In Jahrom statistical analysis of data from Duncan's test at 5% showed that there were no significant difference between yield of treatments, although the best treatments was 400gr- Mn-Sulfate with sulfur. The result have been gotten from Duncan's test at 5% showed the effect of micro-element and sulfur on components of fruit quality was significant, and Fechelate plus sulfur increased weight of fruit seed in comparison with other treatments. In Darab the results showed Cu-treatment increased yield (8818 kg/ha) of Shahani date palm in comparison to control (3941 kg/ha) and also treatments had no significant effects on improvement of fruit quality but the highest fruit-number belonged to Mn-treatment. In Minab the result showed that were no significant difference between yield and quality of treatments on Brahi date palm but Mn-treatment increased T.S.S in comparison to other treatments. 23 In Hajiabad statistical analysis of data from Duncan's test at 5% showed that there were no significant difference between yield and quality of treatments on Piarom date palm. In Bousher statistical analysis of data from Duncan's test at 5% showed that there were no difference between yield of Kabkab date palm but the highest yield belonged to Fe-treatment with 19100 kg/ha. The results have been gotten from Duncan's test at 5% showed the effect of Fe-treatments on components of fruit quality were significant and increased T.S.S% and sugar% in comparison with other treatments.