Response of jujube trees to the treatment of gebbrllic acid and calcium chloride 1- Effect of spraying gibberellic acid and calcium chloride on yield and some vegetative , physical , chemical , physiological characteristics of jujube fruits Z . mauritiana Lam. cv. Tufahi | ||
| Thi-Qar University Journal for Agricultural Researches | ||
| Article 1, Volume 5, Issue 1, December 2016, Pages 299-332 | ||
| Authors | ||
| Dhia Ahmed Taain; M. A.Ibrahim; Nidal Resan Hariz Shala | ||
| Abstract | ||
| The present study was conducted on jujube trees "Ziziphus mauritiana Lam." , cv. Tufahi during the growing season 2013 -2014. The aim of the study will to investigate effects of spraying gibberellic acid at the concentrations of 25 mg/l , 50 mg/l and calcium chloride at the concentrations of 1% , 2% and their combinations on yield and some vegetative , physical , chemical , physiological characteristics of fruits. The results of study showed significant effect of spraying gibberellic acid on all the studied parameters with the treatment of 50 mg/l gibberellic acid recording the highest significant increase in leaf area , total carbohydrates and the length , diameter , fresh weight , volume of fruits in addition to the water content, sucrose of fruits and the amount of yield. Treatment of 2% calcium chloride gave the highest significant increase in vitamin C concentration, total carbohydrates of leaf and calcium and chloride concentrations in fruit. Control treatment recorded the highest significant increase in dry mater , total soluble solids , total and reducing sugars, respiration rate and invertase and cellulase activities and carotene concentration in fruit skin . The period after full bloom factor had a significant effect on the studied vegetative parameters with the period of 10/2/2014 recording the highest significant increase in leaf area, carbohydrates content. The combination treatment of 50 mg/l gibberellic acid and the period of 10/2/2014 recording the highest significant increase in leaf area. The combination treatment of 2% calcium chloride and the period of 10/2/2014 was superior in carbohydrates content while the combination treatment of untreated fruits and the period of 3/2/2014 gave the highest activity of cellulase. | ||
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