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Effects of Temperature, Relative Humidity and Moisture Content on seed longevity of Shrubby Russian Thistle （ Salsola vermiculata L,）

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Journal of Agricultural Science and Technology(B) 2013年第9期3卷 623-634页

作者： Abdoul Aziz Niane Paul Christiaan Struik Zewdie Bishaw International Center for Agricultural Research in the Dry Areas (ICARDA) Beirut Lebanon Centre for Crop Systems Analysis Wageningen University AK Wageningen NL-6700 Netherlands

Salsola vermiculata is a highly palatable shrub and widely used in rangeland rehabilitation programs, but has short seed longevity. To identify the most cost effective storage method for S. vermiculata, experiments were carried out to test the effects of fruit bracts （wings）, temperature regimes, seed moisture and packaging methods on storage life. seed samples were removed from storage at monthly intervals for testing and towards the end of the experiments samples were transferred from hermetic to ambient storage conditions and tested for germination. Experiment 1 continued for 1,140 days, Experiment 2 for 720 days. For de-winged seed, high moisture content increased seed longevity, suggesting that desiccation susceptibility is one of the causes of limited longevity in this species. Most longevity regression lines of winged seeds had negative intercepts suggesting increase in germination resulting from gradual dormancy-breaking. Drying and packaging alone increased longevity by 7.6 and 3.8 times in Experiments 1 and 2, respectively. Samples kept at lower temperature and lower moisture treatments survived longer under ambient conditions. Increased longevity by drying and vacuum packaging alone can provide simple, cost effective and environmentally friendly options for rangeland rehabilitation programs.

关键词： Salsola vermiculata L. seed storage vacuum packaging seed longevity probit analysis.

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longevity of Shinybark birch,Betula luminifera,seeds in Relation to Maternal Families and Storage Conditions

Longevity of Shinybark birch,Betula luminifera,Seeds in Rela...

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第九届中国林业青年学术年会

作者： Xiangxiang Fu ,College of Forest Resources and Environment,Nanjing Forestry University,Nanjing,P.R.China, 210037,

Betula luminifera *** seeds were found to have an orthodox seed storage behavior, but showed a shorter longevity（less than 3 months） in open storage（where seeds are stored in unsealed containers） at ambient *** be able to sow the seeds in the spring following, the effect of different maternal families,seed moisture content（MC）,and storage temperatures on seed longevity was *** results showed that of three maternal families,seed lot from No.3（large size） had the shortest storability either at room temperature or 15℃,the other two families（mediate size and small size） expressed the similar storability both at room temperature and 15℃.While the relationship between maternal families and their half-life period was significant（p＜0.05）.Within the MC ranges studied in 2006,the seed lot with 3.5%MC demostrated a better storability than other two MCs at room *** viability was maintained throughout storage period at 0-5℃and 15℃,whereas rapid loss in viability was observed at room temperature,and the half-life period of both seeds with either 9.1%or 5-6%MC was 13-14 *** results from this study suggest that seeds of mediate and small size have longer longevity,the most commercial and effective combination is hermetically stored at 15℃with 9-10%MC for 2 years or ***,3.5%MC combined with hermetic storage at a range of temperatures（from 0℃to room temperature） can be used for medium-term storage.

关键词： Betula luminifera seed storage seed longevity viability equation

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Comparison of Methods for Ultra-drying of Chinese Chive seeds

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Agricultural Science & Technology 2013年第4期14卷 598-601页

作者：孟淑春李秀清马连平刘玲北京市农林科学院蔬菜研究中心农业部华北地区园艺作物生物学与种质创制重点实验室农业部都市农业(北方)重点实验室北京100097

[Objective] This study aimed to identify the ultra-drying method most suitable for the storage of Chinese chive seeds through comparing different ultra-drying meth- ods. [Method] Through setting treatments including freezing, silica gel drying and heating drying at 50℃ as well as two controls, the effects of different drying methods for storing ultra-dried Chinese chive seeds were compared. [Result] There were no significant differences in the germination rate and seedling length between Chinese chive seeds treated with heating drying at 50℃ and those treated with either freezing or get drying at the initial stage of the storage. Storing of Chinese chive seeds previously treated with either heating drying at 50℃, or freezing or gel drying for 0-98 months at 20℃ hadn＇t caused any adverse effect on the germination rate of seeds. And the effect of different storage conditions on seedling length displayed earlier than that on the germination rate. There was no significant difference on seedling length between seeds treated with heating drying at 50℃ and those treated with freezing drying after stored for as long as 98 months, revealing similar efficacy on storing seeds. [Conclusion] Freezing drying requires huge investment and cost for perennial running, and silica gel drying is slow in drying and time-consuming. By contrast, heating drying at 50℃ is an economic and simple method, which can enable the Chinese chive seeds to sustain a longevity of eight years or more.

关键词： Chinese chive seeds Ultra-drying methods seed longevity

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