Related Experiment Video
Updated: May 21, 2026
Forced Flowering in Mandarin Trees under Phytotron Conditions
Published on: March 6, 2019
[Research of seedling quality grading of Dendrobium nobile]
Ling Tang1, Li-Xia Zhang, Yun-Qiang Wang
1Yunnan Branch, Institute of Medicinal Plant, Chinese Academy of Medical Sciences, Peking Union Medical College, Jinghong 666100, China. tl_128@163.com
Objective:
To establish the seedling quality grading standard of Dendrobium nobile.
Methods:
Height, stem thickness and stem nodes of seedlings (test-tube seedling and cutting seedling) from Chishui city Guizhou province were tested. Through statistical analysis, the key indicators for seedling quality grading were defined.
Results:
Height and the number of cluster were the primary indicator of test-tube seedling; Height and the number of buds were the primary indicator of cutting seedling.
Conclusion:
The grade test-tube seedling quality of each grade should reach the following requirements: for the first grade seedlings height > or = 17cm, the numbers of cluster > or = 3; For the second seedling height 11 -17cm, the numbers of cluster > or =2. The grade cutting seedling requires the first grade seedlings height > or = 12cm, the numbers of buds > or = 3; The second grade seedling height 6 - 12cm, the numbers of cluster > or = 2. Seedlings those can hot reach the second grade requirements are defined as unqualified seedlings.
