Phenological study of different Poplar clones Populus euramericana and Populus deltoides in Karaj collection during 1986 - 2004

Document Type : Research article

Authors

1 Senior Research Expert, RIFR

2 Associate. Prof., RIFR

3 Research Expert RIFR

4 Assistant. Prof. RIFR

Abstract

Poplar collection project was carried out in frame of the national project for gathering native and exotic poplar clones and establishing of selection nursery, using 57 different species and clones in year 1984 in the Alborz research center, Karaj. Five seedlings from each clone (two years old) were planted in lines with 5m×8m spacing. During the study years, more new clones from five poplar sections were gradually added to the pervious ones. Therefore, the total number of poplars in the collection became to 69 samples. Irrigation, weed control and branch pruning have been done during growing seasons. Phenological studies of different Poplar clones have been done from mid December to mid February, every year. In the first three months of growing season, phenological phenomena have been observed and recorded by binocular, twice a week and during the other months it has been done once a week. In this paper, we revealed information of phenological study for 28 Populus euramericana and Populus deltoides clones. Results showed that vital activity in poplar trees starts between late February until late April and ends up between late October until middle of December. Vital phenomena (blooming, flushing, maturity and dispersal of seeds and leaf fall) have appeared in different times among different clones and different years depending on air temperature. By checking of blooming and flushing dates during the study period we can conclude that the beginning of the vital activities tends from April to March and from March to February. This means that spring begins sooner in the last years of the experiment. In the other word, the length of the growth season during these years has been increased by several days in Kkaraj climatic conditions.
 

Keywords

References

- بزرگمهر، ع.، 1381. گزارش پنج‌ساله طرح کلکسیون پایه مادری صنوبر ایستگاه تحقیقات کهنه‌کن بجنورد. مرکز تحقیقات منابع طبیعی و امور دام استان خراسان. 37 صفحه.
 - دانشور، ح.، 1384. گزارش نهایی طرح تحقیقاتی احداث کلکسیون پایه مادری صنوبر در ایستگاه تحقیقاتی شهید فزوه اصفهان. مؤسسه تحقیقات جنگلها و مراتع کشور. 96 صفحه.
- قاسمی، ر.، جلیلی، ع.، اکبری نیا، م. و مدیررحمتی، ع.، 1380. بررسی فنولوژی ارقام مختلف صنوبر در کلکسیون پایه مادری مرکز تحقیقات البرز کرج درسالهای 1376 و 1377. تحقیقات جنگل وصنوبر ایران، 6: 94-63
- قاسمی، ر.، مدیررحمتی، ع. و همتی، ا.، 1381. گزارش نهایی طرح آزمایش مرحله نهایی سازگاری ارقام مختلف صنوبر (پوپولتوم مقایسه‌ای) در شرایط اقلیمی کرج. مؤسسه تحقیقات جنگلها و مراتع. 69 صفحه.
– لطفیان، ح.، 1364. گزارش طرحهای تحقیقاتی قبلی صنوبر و ارائه نتایج مقدماتی بعضی از آنها. انتشارات مؤسسه تحقیقات جنگلها و مراتع. مجموعه مقالات ارائه شده در سمینار اهمیت صنوبر. نشریه شماره 45: 117 - 51
- یوسفی، م.، مدیررحمتی، ع.، قاسمی، ر. و شهریور، ع.، 1381. گزارش نهایی طرح کلکسیون پایه مادری صنوبر، ایستگاه سراب‌تاوه یاسوج. مؤسسه تحقیقات جنگها و مراتع. 45 صفحه.
- Kohan. S., 1963. Results of phenological investigation of poplars on comparative trail plots in E. Slovakia. Ved. Prace Vyskum. Ust. Lesn. Hosp. Bansk. Stiva. 4: 121-137.
- Vogl, M., 1966. Leaf-fall and autumn translocation in leaves of poplars. Arch. Forstw. 15(5/6): 641-651.
- Yu, Q.B., 2001. Growth and phenology of hybrid aspen clones (Populus tremula L. x Populus tremuloides Michx.). Silva-Fennica. 35 (1): 15-25.
- Zhang, Q., and Xiaohua. S., 1999. Study on the collection, preservation and genetic valuation of genetic resources of Populus deltoides Bartr. Research institute of Forestry, Beijing, China. Scientia- Silvae- Sinicae. 35 (2): 31-37.
Iranian Journal of Forest and Poplar Research
Volume 16, Issue 3 - Serial Number 33
December 2008
Pages 407-390

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