Determination of diameter growth of forest trees and shrubs (Beech), in VAZ experimental forest (Mazandaran province)

Authors

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

2 Golestan Agricultural and Livestock Research Center, Gorgan, Iran

Abstract

In order to find out the diameter growth rate of beech trees in Caspian Forest region, to randomize plots(each 0.5 ha) were chosen. Strees were selected in each diameter class. Qualitative characteristics were studied in each tree and also samples were made by increment borer. The main results could be summarized as following:
1- About 75% trees with best quality belongs to dominance layer. Which has the minimize branches. as well as healty and well developed crown.
2- The highest velume increament(3.25 silve/ha) belongs to dominance layers and the lowest velume increament(0.13 silve/ha) belongs to suppressed layer.
3- There is a positive relationship between crown velume and velume increament.
4-There is a linear regresion between dbh and crown diameter (Dbdh=0.921+0.122 Dc).

References

1- اصلی، ع، اتر، ه.  1348، اندازه‌گیری رویش جنگل. دانشکده جنگل‌داری دانشگاه تهران، نشریه شماره 13، 72 صفحه.
2- اصلی، ع. 1355. اندازه‌گیری دینامیک و استاتیک. پلی‌کپی درسی دانشکده منابع طبیعی کرج، دانشگاه تهران.
3- اتر، ه. 1370 جنگل‌داری 1و 2. پلی‌کپی درسی دانشکده منابع طبیعی کرج، دانشگاه تهران.
4- حجاری، ر. 1342، اندازه‌گیری و آمار جنگل. انتشارات دانشگاه تهران، شماره 865، 283صفحه.
5- زبیری- م. 1373. آماربرداری در جنگل. انتشارات دانشگاه تهران، شماره 2238 ،401 صفحه.
 
6.Jerram, M.R.K. 1980,ff Elementary Forest Mensuration, New Delhi, 124pp.
7.G.Deveries, P. 1986. Sampling theory for forest inventory springer- verlag, 399pp.
Iranian Journal of Forest and Poplar Research
Volume 2, Issue 1
March 1999
Pages 1-52

Files

Share

How to cite

Statistics