نوع مقاله : علمی- پژوهشی
نویسندگان
اعضای هیأت علمی مرکزتحقیقات کشاورزی و منابع طبیعی استان مازندران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In order to investigate the adaptation of Juniperus species, two plantations of Eastern Red cedar that were 10 years old (with 5285 m2 area) and at spacing of 2×2.5m and 22 years old (with 1600 m2 area) and at spacing of 4×4m were chosen in Chamestan experimental station in Mazandaran province.
In 2003, data for survival, d.b.h, height and quality were collected. Results could be summarized as following:
1- 10 years old trees showed generally 66.8 % survival, 4.3m in height, 6.2cm in d.b.h. Mean annual height and diameter increment were 43cm and 6.2 mm, respectively. The highest mortality rate (21.4%) was recorded in the third year of plantation. The highest rate of annual height growth (78 cm) was recorded in the 5th year and the highest rate of annual diameters increment (10mm) in the 10th year after plantation.
2- 22 years old trees showed 98% survival, 7.28m in height and 18.6cm in d.b.h. Mean annual height and diameter increment were 33cm and 8.5mm, respectively. Stem quality in two plantations showed that 90% of trees have quality of first grade. In general, Eastern Red Cedar could be introduced as promissed species for plantation in suitable areas.
کلیدواژهها [English]
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