کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4374769 1617200 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Digital image analysis of different crown shape of Platycladus orientalis
ترجمه فارسی عنوان
تجزیه و تحلیل تصویر دیجیتالی از شکل تاج مختلف Platycladus orientalis
کلمات کلیدی
Platycladus orientalis؛ شکل تاج؛ محیط زیست هواشناسی؛ شاخص شکل تاج؛ تجزیه و تحلیل تصویر دیجیتال
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی


• The normal crown shape of Platycladus orientalis is the tower form.
• Its fusi and torch form crowns are often observed at stress site.
• They are associated with the internal metabolism and the extreme environments.
• The scales and twigs of them typically wilt from lower to upper part of the crown.
• A crown shape index was invented to respond their health status and site condition

Platycladus orientalis (L.) Franco is a beautifully crown-shaped evergreen tree species used for ornamental cultivation. These trees are also important afforestation plants at hill sites containing calcareous parent rocks and exhibit high tolerance to drought and barren sites. However, Platycladus orientalis trees with abnormal crowns, such as fusiform and torch-form, have been identified at sites with extreme drought and barren hills in Shandong, China, although the abnormal crowns does not reduce the ornamental value of these trees. In the present study, we used the RGB imaging and geographical statistical analyses through the construction of meteorological indices. The results indicate that variations of abnormal Platycladus orientalis crowns are associated with both the internal metabolism of these trees and the external environment. Crown shapes are strongly affected by the local dry, hot and windy meteorological environment, particularly individuals planted at poor hill site conditions. In response to extreme events of drought, high temperature and strong winds, the twigs and scale leaves of Platycladus orientalis typically wilt from the lower part to the upper part of the crown. The fusiform and torch-form crowns are formed through the wilting of partial twigs and scale leaves to avoid the entire wilt of the trees, thereby saving the life of the tree at the expense of partial twigs and scale leaves.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Informatics - Volume 34, July 2016, Pages 146–152
نویسندگان
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