| 沙柳有性繁殖与关键环境因素的关系研究 |
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| 引用本文： | 米志英,张宏俊,高永. 沙柳有性繁殖与关键环境因素的关系研究[J]. 中国沙漠, 2011, 31(5): 1238-1241 |
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| 作者姓名： | 米志英 张宏俊 高永 |
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| 作者单位： | 1.内蒙古电子信息职业技术学院, 内蒙古 呼和浩特 010070； 2.内蒙古农业大学, 内蒙古 呼和浩特 010019 |
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| 基金项目： | 国家科技支撑计划项目(2011BAC07B02-3); 内蒙古农业大学科技创新团队支持计划项目(NDTD2010-11)资助 |
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| 摘 要： | 沙柳种子的萌发受到多个因素的综合作用。在沙土含水量较低时沙柳种子可以萌发,但沙土含水量低于2%时不能萌发；干旱胁迫使沙柳实生苗发芽率降低；盐分可明显抑制沙柳种子萌发,同时抑制沙柳实生苗的茎生长；沙柳种子适宜的覆沙厚度是1.0～4.0 mm,当覆沙达到7 mm时种子出苗受到抑制；沙柳最适宜的发芽温度是25 ℃,当温度升到40 ℃时发芽率明显下降,而当降到10 ℃时种子发芽率也明显下降,达到5 ℃时沙柳种子尽管能发芽,但无茎生长。
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| 关 键 词： | 种子 有性繁殖 环境因素 沙柳 |
| 收稿时间： | 2011-01-07 |
| 修稿时间： | 2011-03-25 |
Research on Relations between Sexual Propagation of Salix psammophila and Key Environmental Factors |
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| MI Zhi-ying,ZHANG Hong-jun,GAO Yong. Research on Relations between Sexual Propagation of Salix psammophila and Key Environmental Factors[J]. ournal of Desert Research, 2011, 31(5): 1238-1241 |
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| Authors: | MI Zhi-ying ZHANG Hong-jun GAO Yong |
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| Affiliation: | 1.Inner Mongolia Electronic Information Vocational Technical College, Hohhot 010070, China; 2.Inner Mongolia Agricultural University, Hohhot 010019, China |
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| Abstract: | Seed germination of Salix psammophila are affected by many factors. Results show that the seeds of Salix psammophila can not germinate when soil moisture is below 2%; the seed germination and seedlings stem growth are significantly restrained by PEG stress and NaCl stress; the optimal sand burial depth of the seeds of Salix psammophila is 1.0—4.0 mm and the seeds of Salix psammophila can not germinate when the sand burial depth is more than 7 mm; the most suitable temperature for seed germination is 25 ℃, and the germination rate reduces seriously when the temperature is higher than 40 ℃ or lower than 10 ℃; the seeds of Salix psammophila can germinate still when the temperature is lower than 5 ℃, but the seedlings don’t grow. |
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| Keywords: | seed sexual propagation environmental factors Salix psammophila |
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