Author(s): HOU Longyu1, 2 DUAN Xinfang2 Li Qingmei3 LIU Guangquan4 MA Fengyun1 1. Forestry College of Shandong Agricultural University, Tai’an 271018, P.R. China 2. Research Institute of New Forestry Technology, Chinese Academy of Forestry, Beijing 100091, P.R. China 3. Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, P.R. China 4. Northwest Agriculture and Forestry University, Yangling 712100, P.R. China
Pages: 88-92
Year: 2008 Issue:  1
Journal: Chinese Forestry Science and Technology
Keyword:  GetLinkList(KeywordFilter('ultra-dry;  viability;  dehydrogenase activity;  α-amylase activity;  Platycladus orientalis;  seed'); 'kw'; 'CJFQ');
Abstract: In order to supply quality seed for vegetation restoration in arid and semiarid areas of Northwest China, the effects of Platycladus orientalis seed storage under ultra-drying and accelerated aging were studied. The seeds were dried from 6.8% to 5.1%, 4.4%, 3.7% and 2.2% MC, respectively, in a desiccator with the silica gel. The germination energy, germination percentage, germination index and vigor index of the seed were investigated. After ultra-drying, groups of seeds were carried on the accelerated aging tests in an oven at 50 oC for 10, 20 and 30 d , respectively, and the physiological indexes, including relative conductivity, dehydrogenase activity and α-amylase activity were tested. The results show that the ultra-dried seeds with 3.7% MC have the highest germination energy, germination percentage, germination index and vigor index. After aging, the dehydrogenase activity and α-amylase activity of the group of seeds of 3.7% MC were higher than those of 6.8%, while the relative conductivity of the group of 3.7% is lower than that of 6.8%. It is feasible to ultra- dry the seeds with 3.7% MC.