Effect of volk oil and potassium nitrate on budbreak, yield and some quantitative and qualitative characteristics of pistachio (Pistacia vera L.) nuts

Purpose: The aim of this study was to improve yield, and characteristics of pistachio nuts of three cultivars by foliar application of volk oil and potassium nitrate. Research method: The study was carried out during the bud swelling stage using a factorial design, following a randomized complete block design with four replications. The experimental factors consisted of three cultivars, namely 'Fandoghi', 'Hasan-Abbasi', and 'Haj-Abdollahi', and three treatments: volk oil (۱% and ۲%), potassium nitrate (KNO۳) (۰.۳% and ۰.۵%), and a mixture of volk oil and KNO۳ (۱% volk oil + ۰.۳% KNO۳, and ۱% volk oil + ۰.۵% KNO۳). A control treatment was also included in the study. Findings: The results of this study showed that the highest percentage of open shell nuts (۵۲.۱۷%) was observed in ‘Hasan-Abbasi’ cultivar, and the highest fresh weight of ۱۰۰ nuts in ‘Haj-Abdollahi’ (۲۰۲.۲ g). The lowest ounce (۲۹.۰۷), the highest dry weight of ۱۰۰ nuts and ۱۰ kernels weight were obtained ۷۶.۲۶ and ۲۶.۵۶ g in ‘Fandoghi’ cultivar, respectively. The use of ۲% volk oil treatment was effective in budbreaking, as well as increasing the percentage of open shell nuts and reducing the percentage of balk nuts. Research limitations: There was no limitation. Originality/Value: ۰.۵ % KNO۳ increased the fresh and dry weight of ۱۰۰ nuts and decreased ounce of pistachio in all cultivars. Therefore, the use of volk oil and KNO۳ treatments can be effective in pistachio orchards, and increase the quantity and quality of the yield.

کلیدواژه ها:

Dry weight ، Foliar application ، Fresh weight ، Pistacia vera ، Volk oil