Effect of pinching and spraying with gibberellic acid and zinc on growth   flower and pigments of plant Geranium Pelargonium hortorum L. (1)

	Effect of pinching and spraying with gibberellic acid and zinc on growth flower and pigments of plant Geranium Pelargonium hortorum L. (1)
Kufa Journal for Agricultural Science
Article 1, Volume 6, Issue 1, 2014, Pages 16-33
Abstract
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 of plant Geranium Pelargonium hortorum L. The experiment included 18 factorial treatments . which included the interaction of three factors. pinching (pinching and without pinching) spraying with Gibberellic acid (0 .150. 300) mg.L-¹ and zinc elements (0 .30 .60) mg.L-¹ The experiment was conducted as aFactorial experiment using Randomized Complete Block Design with three replicates. Each experimental unit consisted of 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 level. Results showed that: pinching treatment caused a significant increased in the number of side shoots , number of inflorescences floral , duration of the flowering period , inflorescences floral content of anthocyanins pigments , leaves content of the chlorophyll pigment , leaves content of the zinc while Non pinching treatment significant increased in plants height , earlier flowering and inflorescences cenent of carotene pigment . Spraying plants with gibberellic acid 300 mg.L-¹ gave a significant increased in plants height , number of inflorescences floral , duration of the flowering period , and leaves content of the chlorophyll pigment while spraying plants with gibberellic acid 150 mg .L-¹ gave a significant increased in the inflorescences floral content of anthocyanins pigment and earlier flowering while it did not appear any significant effect on a number of qualities including the number of side shoots , inflorescences content of carotene pigment and the zinc content in the leaves .The plants treated with at a zinc- concentration of 60 mg.L-¹ showed a significant superiority in the plants height , number of side shoots ,earlier flowering , number of inflorescences floral , inflorescences content of carotene pigment , the inflorescences floral content of anthocyanins pigment , leaves content of the chlorophyll pigment and the zinc content . Spraying plants with 30 mg.L-¹ zinc gave a significant increased in the duration of the flowering period . The two and three . way interactions among treatments were significant in all studied characteristics .

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