Pre-sowing treatment for breaking dormancy in Acer velutinum Boiss. seed lots

编号 zgly0000818193

文献类型 期刊论文

文献题名 Pre-sowing treatment for breaking dormancy in Acer velutinum Boiss. seed lots

作者 Mostafa  Farhadi  Mulualem  Tigabu  Alireza  Ghasemi  Arian  Mehdi  Sharifani  Abolfazl  Daneshvar  Per  Christer  Oden 

作者单位 Swedish  University  of  Agricultural  Sciences  Education  Center  of  Jihad-Agriculture  Gorgan  University  of  Agricultural  Sciences  and  Natural  Resources 

母体文献 林业研究: 英文版 

年卷期 2013(2)

页码 273-278

年份 2013 

分类号 S 

关键词 cold-stratification  altitude  physiological  dormancy  velvet  maple  seed  germination 

文摘内容 Acer velutinum Boiss is a valuable tree species native to Iran, and its seeds possess physiological dormancy that hampers seedling production in the nursery for large-scale reforestation efforts. The aim of this study was to determine the optimal dormancy breaking treatments for A. velutinum seeds. We conducted a factorial experiment involving six seed lots collected along an elevation gradient from 300 to 1800 m at 300 m interval and four cold-moist stratification periods (0, 4, 8 and 16 weeks) at 4℃ and 70% relative humidity. The result shows that the germination of cold-moist stratified seeds was significantly (p 〈 0.0001) higher than the control for all seed lots. The highest germination capacity was recorded after 16 weeks of cold-moist stratification for all seed lots (68% 88% depending on the seed lot) except those collected from mid altitude sites (600 and 900 m) that germinated equally well (≥ 75%) after 4and 8-week of clod-moist stratification compared to the other seed lots. The mean germination time was significantly shorter (12 to 19 days, depending on the seed lot) for seeds stratified for 16 weeks than for untreated seeds. It can be concluded that: (1) cold-moist stratification for 16 weeks is the best pre-sowing treatment for breaking dormancy in A. velutinum seeds; and (2) seeds should be collected from mid altitude sites (600 and 900 m) to get more than 80% germination within 15 days, and these seed lots even required shorter cold-moist stratification period(eight weeks) than other seed lots.