Investigation on adaptation and performance of Olive (Olea europaea L.) cultivars seedlings at Qom area of Iran

Document Type : Research article

Authors

1 Members of Scientific Board, Agricultural & Natural Resources Research Center of Qom provinceIran.

2 Members of Scientific Board, Agricultural & Natural Resources Research Center of Qom province

Abstract

The aim of the study was to investigate adaptability of 12 olive cultivars at Maroon station of Qomprovince of Iran. The trial was conducted under Randomized complete Blocks Design with three replicates. The seedling performances, including height, collar diameter, survival and crown cover diameter were recorded and analyzed for three years. In order to study the resistance of the olives to wind and determine their shade area, other parameters including collar diameter/height and crown cover diameter/height ratios were calculated. The statistical analysis of the third year data showed that the effects of olive cultivars on the whole seedlings performances were significant (P<0.01), whereas the effects of the replicates were not significant (P<0.05). The variance coefficient (cv) of the olive performances was at normal level. The lowest and the greatest values of cv, belonged to crown cover diameter (3-9%) and crown cover/height ratio (12.1%), respectively. The best cultivars in respect to different seedling's performances were as follows:
Height: Rashid and Roughani, collar diameter: zard and valanollia and crown cover diameter: Roughani, Rashid and Zard.
The double statistical analysis for three years, indicated that the effects of year and cultivars on the olives performances were significant (P<0.01), except for collar diameter/height and crown cover diameter/height ratios. Furthermore, the effects of interaction between year and cultivars on the performances were significant (mostly p<0.01), except for collar diameter/height ratio. The four parameters (survival, height, collar and crown diameter) were correlated significantly and positively with each other. According to cluster analysis results, the olive cultivars were classified to four groups: 1- Sivillana, Manzanilla, Zarde-Qom and Shengeh; 2- Arbikin, Gorgan and Mishen; 3- Roughani, valanollia and Rashid' 4- Zarde-Manjil. There were two top growth periods at each year: 16th March to 21st June and 6th September to 21st November.

Keywords

References

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