Effect of gibberellic acid, chelated iron coconut liquid in some flowering growth traits and the volatile oil yield for jasminum sambac (l.)‎ ait plant

الملخص EN

The study was conducted during the two growth seasons (2015-2016 and 2016-2017) at the production nursery (Saran) belonging to the Research Station, College of Agriculture, University of Basrah, Qarmat Ali city.

The study aimed to investigate the effect of spraying Gibberellic Acid (GA3), chelated Iron and Coconut liquid on some flowering growth indicators and volatile oil yield of Jasminum sambac (L.) Ait.

The study included 27 factorial treatments, It included combinations of three factors, namely, Gibberellic acid with three concentrations of (0, 150, 300 mg.

L -1 ), the chelated Iron with three concentrations of (0, 50, 100 mg.

L -1 ) and Coconut liquid with three concentrations of (0, 15, 30%).

The Complete Randomized Block Design was used, with three replicates for each treatment.

Thus, the number of experimental units is 81 experimental units, with a rate of 6 plants per experimental unit.

So, the number of plants used in the experiment is 486 plants.

The averages were Compared according to the Revised Least Significant Difference (R.L.S.D.) Test at probability level of 0.05.

The following are the main results: 1- Spraying plants with Gibberellic acid at a concentration of (300 mg.

L-1 ) led to a significant increase in the number of flowers and total flower yield and the volatile oil yield and the fresh weight for flowers, in the first season and when spraying it with a concentration of (150 or 300 mg.

L-1 ) led to a significant increase in the percentage of volatile oil for the two seasons of study, and fresh weight for flowers in the second season.

2- Jasminum sambac (L.) Ait plant responded to spraying with chelated iron, spraying it with a concentration of (100 mg.

L-1 ) led to a significant increase in the number of flowers, the fresh weight of the flowers, total flower yield, the percentage of volatile oil and the volatile oil yield for the two study seasons.

3- The spraying of plants with coconuts at a concentration of 30% had a significant effect on the number of flowers, total flowers yield and volatile oil yield for the two study seasons, When spraying it with a concentration of (15% or 30%) led to a significant increase in the percentage of volatile oil for the two study seasons.

4- Bi-interactions and triple interactions had a significant effect for most flowering growth indicators and volatile oil yield for the two study seasons