Determination of Beech (Fagas oricffiolis Lipsky) seeding cycle at caspian Forests of Iran (Kelardasht)

Document Type : Research article

Authors

1 Member of Scientific Board, Forest Research Division, Research Institute of Forests and Rangelands, Tehran, Iran

2 Nowshahr Experimental Station, Mazandaran Agricultural and Natural Resources Research Center, Nowshahr, Iran

3 Member of Scientific Board, Department of Forestry and Forest Economic, Faculty of Natural Resources, University of Tehran, Karaj, Iran

Abstract

The research project of determining Beech seeding cycle was conducted at Kelardasht region of Caspian Forests.
Thirty dominant Beech trees were selected for quantity and quality measurement. After soil and ground cover sampling and tree measurments, the trees were cut down and a disc sample was taken from each tree stump. The discs were analyzed at Division of Wood Science Labs of Research Institute of Forests and Rangelands to study the annual rings. The results showed that:
1- Fagus orientalis has two seeding methods, heavy and light.
2- The minimum age of seeding is about 30 years when is Often associated with light seeding.
3- The heavy seeding begins at age of 60 years.
4- At a same site, different seeding cycles were observed during the living period.
5- The light and heavy seeding  continues every 1-5 and 3-18 years, respectively.
6- It seems that natural regeneration depends on light seeding cycles beacause of their frequent occurance.
7- Forest management projects should be based on light seeding cycles rather than heavy seeding cycles. As a result, the harvesting period should be increased from 5 years to 10 or 15 years.
8- There was a relationship between annual ring growth rate and seeding methods as follows:
a. If decrease rate of annual ring growth is less than 0.74 mm, there will not be seeding cycle.
b. If decrease rate of annual ring growth is between 0.74 mm and 15 mm. then there will be light seeding cycle.
c. If decrease rate of annual ring growth is more than 15 mm, there will be heavy seeding cycle.

Keywords

References

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Iranian Journal of Forest and Poplar Research
Volume 3, Issue 1
June 1999
Pages 1-60

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