Effect of some chemical treatments on bud dormancy release, flowering, and yield of Akbari Pistachio under saline conditions

Document Type : Original Article

Authors

1 Assistant Professor, National Salinity Research Center, Agricultural Research, Education and Extension Organization (AREEO), Yazd, Iran.

2 Researcher, National Salinity Research Center, Agricultural Research, Education and Extension Organization (AREEO), Yazd, Iran.

10.30466/rip.2023.54477.1258

Abstract

In the present study, the effects of some chemical compounds on bud dormancy release, flowering, and yield of ‘Akbari’ pistachio under saline conditions (16.1 dS m⁻¹) were investigated based on a randomized complete block design. The treatments included the control, different concentrations of Volck oil (5.5, 6, and 7%), soybean oil (4, 5, 6, and 7%), 5% soybean oil + 0.5% potassium nitrate, 6% soybean oil + 0.5% potassium nitrate, 7% soybean oil + 0.5% potassium nitrate, 5% soybean oil + 0.5% potassium nitrate + gibberellic acid at 20 mg L⁻¹, 6% soybean oil + 0.5% potassium nitrate + gibberellic acid at 20 mg L⁻¹, and 7% soybean oil + 0.5% potassium nitrate + gibberellic acid at 20 mg L⁻¹. According to the results, the highest percentage of blank nuts (33.67%), the highest percentage of shell splitting (44.04%), the lowest percentage of split nuts (55.96%), the lowest percentage of bud-to-cluster conversion (53.22%), the lowest mean number of nuts per cluster (7.66), and the lowest dry-nut yield per hectare (904.66 kg) were observed in the control trees. Application of Volck oil at 5.5% significantly increased dry-nut yield per hectare. The efficacy of soybean oil in combination with potassium nitrate and gibberellic acid was greater than that of Volck oil. The combinations of 6% soybean oil + 0.5% potassium nitrate + gibberellic acid at 20 mg L⁻¹ and 7% soybean oil + 0.5% potassium nitrate + gibberellic acid at 20 mg L⁻¹ increased dry-nut yield by 67.92% and 79.77%, respectively, compared with 5.5% Volck oil (farmer control). These combinations improved the quantitative and qualitative characteristics of the harvested dry nuts by increasing the percentage of bud-to-cluster conversion, increasing the mean number of nuts per cluster, and reducing the percentage of blank nuts.

Keywords

References

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Research in Pomology
Volume 9, Issue 1
November 2024
Pages 113-129

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