Effect of preharvest foliar application of different amounts and sources of calcium and ـ- Naphthalene acetic acid on qualitative and quantitative characteristics of EIlona, cut Roses.

In order to determine the effects of foliar application of different sources and rates of calcium and ل-naphtalen acetic acid on quantitative and qualitative characteristics of rose flower cv Ilona, this experiment was conducted as factorial in a randomized complete block with three replications during 2003-2006 in the national ornamental plants research station of Mahallat and Safi Abad agricultural research center. In this experiment, rose plants were sprayed with three rates of calcium (0, 0.3 and 0.6 g.l-1) from three sources (calcium chloride, calcium nitrate and calcium chelate) in combination with two levels of ل-naphtalen acetic acid (0 and 9 mg.l-1). The results in Mahallat showed that interaction between calcium consumption with 0.3 g.l-1 from calcium nitrate source with companion ل-Naphthalene acetic acid caused significant increase in vase life of rose flower (ل = 0.05) in comparison with control abput 4.60 days (40%). Interaction between ل-Naphthalene acetic acid usage and calcium in 0.3 g.l- 1 at the most amount caused significantly increused calcium of leaf (ل = 0.05) without considering kind of calcium source. Interaction between calcium nitrate in 0.3 g.l-1 calcium caused the most amount of N,Mg and B, inspite of it wasn,t significant. With regard to instance above calcium consumption from calcium nitrate source with 0.3 g.l-1 calcium furthermore ل-Naphthalene acetic acid with 9 mg.l-1 under indoor condition recomended. The results in Dezful also showed that the main effects of rates and sources of calcium on yield and number of flowers in first, second and third classes were not affected. In contrast the main effects of applying ل-NAA on above mentioned indices except of third class flowers were significantly influenced at 1% level.Foliar application of ل-NAA(9 mg.l-1) in vegetative quick growth significantly decreased the yield and flower numbers in first and second classes as compared to control duo to increasing the vegetative growth compared to reproductive growth. Leaf magnesium and calcium concentrations were influenced by calcium rates and ل- NAA concentrations at %5 level respectively. Also weight of peduncle was affected by main effects of calcium source and ل-NAA concentration and interaction effects of rates of calcium and sources and ل-NAA concentration at %5 level. But length of peduncle and vase life were not affected by the treatments.With 0.3 g.l-1 calcium from calcium chloride source without ل-NAA increased weight of peduncle that did not significant deference with calcium consumption from calcium nitrate source. In conclusion foliar application of calcium and ل-NAA are not recommended for production of cut rose flower in north Khuzestan under outdoor condition.