پیوندهای مفید
اخبار و اعلانات
آمار
| تعداد نشریات | 157 |
| تعداد شماره‌ها | 6,051 |
| تعداد مقالات | 66,108 |
| تعداد مشاهده مقاله | 111,526,216 |
| تعداد دریافت فایل اصل مقاله | 86,160,180 |
بررسی رابطه بین خصوصیات کیفی درخت سفید کرکوAcer hyrcanum F.et M. و رویشگاه در شیب شمالی البرز | ||
| مجله منابع طبیعی ایران (منتشر نمی شود) | ||
| مقاله 2، دوره 53، شماره 1 - شماره پیاپی 864، فروردین 1379 اصل مقاله (1.16 M) | ||
| نویسندگان | ||
| محمدعلی رجامند؛ محمدرضا مروی مهاجر* | ||
| کلیدواژه‌ها | ||
| ارتفاع از سطح دریا؛ ارتفاع بدون شاخ؛ ارتفاع درخت؛ تقارن تاج؛ جهت شیب؛ خصوصیات کیفی؛ رویشگاه؛ سفیدکرکو؛ شاخه دوانی | ||
| عنوان مقاله [English] | ||
| - | ||
| چکیده [English] | ||
| In order to recognize the relationship between some qualitative characteristics of Acer hyrcanum (Hyrcanian maple) and site (the elevation above the sea level and direction of slopes), in the northern slopes of Elburz, eight forest stands were studied from east to west limits of hyrcanian province in the north of Iran. In each stand according to variable conditions, some plots, and totaly 59 plots were seleCted and in each plot different features were recorded as follows: Altitude, direction of slopes, physiognomy, age of the forest stand, D.B.H. of trees, diameter of crowns, percentage of vegetation cover, total height, trunk length, branch bearing and crown symmetry of trees. Data analysis indicates that the qualitative characteristics of the tree (Acer hyrcanum) including the height of trees, trunk length, crown symmetry and branch bearing are better from the low to the medium ranges of elevation of distribution, as well as in northern slopes and related directions of the north. | ||
| کلیدواژه‌ها [English] | ||
| Branch bearing, Crown symmetry, Direction of slopes, Elevation, height of trees, Hyracanian Maple, qualitative characteristics, site, Trunk length | ||
|
آمار تعداد مشاهده مقاله: 563 تعداد دریافت فایل اصل مقاله: 427 |
||