Effect of foliar application of puttassium sulphate and naphtalin acitic acid on yield and quality of ‘Pearl Tangelo’ mandarin

Document Type : Original Article

Authors

1 Former M.Sc. Student, Department of Horticultural Sciences, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Iran

2 Professor, Department of Horticultural Sciences, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Iran.

3 Associate Professor, Department of Horticultural Sciences, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Iran.

Abstract

Use of plant growth regulators and mineral nutrition may affect the fruits yield and quality. This study was conducted to evaluate the effect of foliar application of naphtalin acitic acid (at 0, 50, 100 and 150 mg.L-1) and potassium and sulphate (at 0, 0.5 and 1%) on yield and quality of Pearl tangelo (Citrus Paradisi Macfad × Citrus reticulata Ten.) fruit. A randomized complete block with three replications comprising 12 treatments on 16 years old Pearl mandarin trees grafted on sour orange rootstock was conducted in a commercial orchard located in Dezfool during 2014. The trees were sprayed with the solutions on 3 June and fruits were harvested on 6 December 2015. Harvested fruits were then transferred to Horticultural Sciences laboratory at Shahid Chamran University for the quality and yield measurements. The results showed that the treatments significantly enhanced the vitamin C content of the fruits. The trees received 100 mg NAA showed vitamin C content of about %19.45 higher than the untreated trees. Potassium sulfate significantly enhanced soluble solids; whereas the fruits from the trees which sprayed with 0.5 % of K2So4 showed 5% higher soluble solids compared to the control. The results indicated that the interaction effect of NAA and potassium sulfate was significantly different on fruit weight, water content, acidity and yield. According to the results, 150 mg.L-1 NAA and 0.5 % potassium sulfate was the best treatment combination for enhancing the quality and yield of fruit.

Keywords

Research in Pomology
Volume 3, Issue 2
October 2019
Pages 16-26

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