Articles
LONG TERM TRIALS ON TOPWORKING OF WALNUT TREES IN IRAN
Article number
1050_25
Pages
197 – 201
Language
English
Abstract
In order to find a suitable method and time for improving the quality and productivity of walnut trees through topworking, a series of field trials were conducted during 2001-2006, in Kahriz Agricultural Research Station located in the northwest of Iran.
In the first preliminary trial, walnut trees were topworked by
9 different methods of grafting or budding.
In the second experiment, two promising grafting techniques including modified bark grafting and cleft grafting of main scaffolds on early April and mid-April were further evaluated in terms of grafting percentage and subsequent impact on growth and fruiting.
The results showed that, the modified bark grafting (BG) performed at mid-April showed the highest grafting success and survival percentage.
Other grafting or budding methods gave poor results and/or no survival.
The effect of genotype on percentage of grafting take was assessed in the last trial, using the modified bark grafting of 15 selected genotypes in 2004. The top worked trees successfully bore fruits after 3 to 4 years.
In 2006, comparison of random paired samples of 10 top worked and control branches showed that the number of nut, kernel color and weight increased significantly in the top worked branches compared to the control.
In the first preliminary trial, walnut trees were topworked by
9 different methods of grafting or budding.
In the second experiment, two promising grafting techniques including modified bark grafting and cleft grafting of main scaffolds on early April and mid-April were further evaluated in terms of grafting percentage and subsequent impact on growth and fruiting.
The results showed that, the modified bark grafting (BG) performed at mid-April showed the highest grafting success and survival percentage.
Other grafting or budding methods gave poor results and/or no survival.
The effect of genotype on percentage of grafting take was assessed in the last trial, using the modified bark grafting of 15 selected genotypes in 2004. The top worked trees successfully bore fruits after 3 to 4 years.
In 2006, comparison of random paired samples of 10 top worked and control branches showed that the number of nut, kernel color and weight increased significantly in the top worked branches compared to the control.
Publication
Authors
R. Rezaee, D. Hassani, K. Vahdati
Keywords
topworking, seedling tree, walnut yield, grafting, budding
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