Effects of pruning intensity on vitality of Pinus eldarica ‎plantation at west Tehran

Document Type : Scientific article

Author

Scientific Board Member, Research Institute of Forests and Rangelands, Tehran, I.R.Iran‎

Abstract

This research was carried out in Chitgar Forest Park, located in west of Tehran with an area of 1450 hectars.
For determining the effects of pruning on vitality of Pinus eldarica  Medw. under water stress, pruning trial was done under Completely Randomized Block design with four Treatments (sever, moderate, light, control) and four replicates. The Replicates were selected on four sites with different ecological conditions and maintenance managements.
The definition of the prunning treatments were as follows:
1- Severe: All of the branches were prunned from crown bottom up to two meters.
2-Moderate: All of the branches were prunned from crown bottom up to one meter.
3-Light: Only the dried, infected and less than two cm diameter branches were prunned.
4-Control: Without pruning , except the dried branches at the low level of the crown.
Inventory has been done at two times, before prunning and one year after prunning. Statistical analysis was done using SPSS software. The results show that prunning the effects of the treatments and the replicates on trees vitality were significant at 0.05 level. The sever prunning had the greatest effect on vitality when water stress was very high and soil productivity was very low. Light prunning had the most effect on vitality in fertile sites with regular irrigation, but the moderate prunning had the most effect on pine vitality in seme-fertile site  under moderate water stress.

Keywords

References

1- بی‌نام، 1381. طرح توسعه، بهسازی پارک جنگلی چیتگر. شرکت‌ جهاد تحقیقات‌ آب‌ و آبخیزداری‌.
2- جمزاد، ز.، 1371. چگونه‌ هرس‌ کنیم‌. مؤسسه‌ تحقیقات‌ جنگلها و مراتع‌. شماره انتشار 84، 192 صفحه.
3- سردابی، ح.، 1368. مونوگرافی کاج تهران. مجموع مقالات تحقیقات منابع طبیعی، نشریه شماره 55. موسسه تحقیقات جنگلها و مراتع.
4- مجدطاهری‌، ح. و جلیلی، ع.، 1375. بررسی‌ مقایسه‌ای اثرات جنگلکاری با کاج الدار و اقاقیا روی برخی از خصوصیات فیزیکی و شیمیایی خاک و پوشش گیاهی زیر آشکوب. پژوهش و سازندگی شماره 32‌ .
5- میربادین‌ ع. و شیبانی‌، ح.، 1373. بررسی علل‌ ضعف‌ فیزیولوژی‌ کاج‌ تهران‌ پارک‌چیتگر. پژوهش و سازندگی شماره 20، 6 صفحه.
6- هیبرد. بی.جی، 1374. جنگلداری‌ شهری‌. سازمان‌ پارکها و فضای‌ سبز شهر تهران‌، 240 صفحه.
7- Cowan,A .N. D.Arb,2002. Principles, Practice and specification for Tree Pruning.
8- Clair. D- Maczulajulajtys, i. LeDisquet, G. Bory, 1999. Pruning stress. International Symposium on Urban Tree Health. ISBN’ 9066059818..
9-Edward F, Gilman and sharonj.Lilly, 2002. Arborist .News, Vol: 11,No: 5.
10- Elmendorf, W. 2001. Pruning Landscape Trees. college of Agricultural Sciences.
11-.Gordon ,T. David L.Wood and Andrew J. Storer, 1997.Pithcanker Task Force, California Forest Pest Council.
12- International Society of Arboriculture, 1997.Pruning Mature Trees.
13- Kalishek, J, 2002. Pruning narrowleaf evergreens. Michighan University Extension.Bay County.
14- Larson, M & J. Lester, 1989. Drought tolerants landscape trees for amator county.
15- US Forest Service diagrams. Tree Pruning a step by step guide.
16- Windsor, J.1997. Pruning evergreens , University of Delaware.
Iranian Journal of Forest and Poplar Research
Volume 12, Issue 1
April 2004
Pages 140-111

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