تأثير قرط القمة النامية و الرش بحامض الجبرليك و الخارصين في بعض صفات النمو Pelargonium hortorum L. الخضري و الزهري و الجذري لنبات الجيرانيوم

Abstract EN

The experiment was conducted at the Cloth House.

college of Agriculture.

Basrah University.

During the growing season of 2012-2013 Garmat Ali Campus.

The objective was to study the effect of pinching.

And spraying with Gibberellic acid and zinc on growth vegetative and flowering and root of plant Geranium.

The experiment included 18 factorial treatments.

Which included the interaction of three factors.

Pinching (pinching and without pinching) spraying with Gibberellic acid at concentrations (0.150 and 300) mg.L-¹ and Zinc element with three concentrations (0 .30 .60) mg.L-¹ The experiment was conducted as a factorial experiment with Randomized Complete Block Design (R.C.B.D) with three replicates, each experimental unit consisted four plants.

The results were analyzed by the analysis of variance and the mean values were compared using the Revised Least Significant Difference Test at 0.05 probability levels.

Results showed that Pinching caused a significant increase in the total leaf number, leaf area and phosphorus percentage, while Non Pinching treatment significant increase the flowering stalk and the number of florets in the inflorescence and potassium percentage, while there was no significant effect of the Pinching in increased number and the main root length.

Spraying with GA3 at concentration of 300 mg.

L-¹ caused a significant increase in leaf number, leaf area, flower stalk, nitrogen and phosphorus percentage in leaves, while spraying with Gibberellic acid at a concentration of 150 mg.L-¹ gave a significant increase in the potassium percentage in leaves, but it did not appear any significant effect of spraying with Gibberellic acid on the number of florets in the inflorescence and number and the main root length.

The results showed plants treated with zinc at a concentration of 60 mg.

L-¹ gave significant superiority in the leaf number, leaf area, height of the flower stalk, number of florets in inflorescences and nitrogen, phosphorus and potassium percentage in leaves.

Also there was no significant effect number and the main root length.

The two and three ways interactions in most treatments were significant in all studied characteristics.