Effect of Dormex® Application on Flowering Time and Vegetative and Reproductive Characteristics of Akbari Pistachio Cultivar
Ali Taj Abadi Pour
1
(
Pistachio Research Center, Horticultural Sciences Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Rafsanjan, Iran
)
Maryam Afrousheh
2
(
Pistachio Research Center, Horticulture Sciences Research Institute, Agriculture Research Education and Extension Organization (AREEO), Rafsanjan, Iran
)
Keywords: Chilling requirements, Hydrogen cyanimide, Pistacia vera, Volk oil,
Abstract :
In recent years, global warming and unusually warm winters have caused many problems for pistachio production in Iran. The effects of the Dormex® application were studied in a randomized complete block design with three treatments and three replications on the Akbari commercial pistachio cultivar in Kerman province. Treatments included Dormex® 4%, Volk oil 4%, and control, all applied in mid-February. Flowering time, gum secretion, current branch length, and qualitative and quantitative yield characteristics were measured. Results showed that Volk oil and Dormex® spring treatments caused early flowering in the Akbari cultivar. The Dormex® 4% treatment significantly prolonged flowering time (8 days earlier than Volk oil 4%, and 12 days earlier than the control). Based on the results, Volk oil treatment increased gum secretion from buds and perennial shoots compared to the Dormex® treatment and control. The results of yield indices showed that the weight of clusters in the Dormex® 4% treatment was 2.3 times higher than the control and about 21% more than the Volk oil 4% treatment, showing a significant difference with the control. Dormex® and Volk oil treatments increased split nut percentage by 66 % and 88%, respectively, but there was no significant difference between them. Based on the results, the blank nut percentage in the Dormex® 4% treatment significantly increased compared to the control and Volk oil treatment by 33% and 41%, respectively. The length of current season growth in the Dormex® 4% treatment significantly increased by 68% compared to the control. The Volk oil 4% treatment had no significant effect on the length of current season growth compared to the control.
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