| 温度对两种野生禾草种子发芽的影响 |
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| 引用本文： | 丁雪梅,李海燕,杨允菲,宋向华.温度对两种野生禾草种子发芽的影响[J].草原与草坪,2004(1):25-29. |
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| 作者姓名： | 丁雪梅 李海燕 杨允菲 宋向华 |
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| 作者单位： | 东北师范大学草地研究所,植被生态科学教育部重点实验室,长春,130024;通辽发电总厂,通辽,028000 |
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| 基金项目： | 国家自然科学基金(30270260,300701370) |
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| 摘 要： | 采用2种恒温和6种变温8种处理方法,研究了不同温度对松嫩平原野大麦和贝加尔针茅2种野生禾草种子萌发影响。结果表明,变温有助于提高2种禾草种子发芽率。野大麦在30℃/20℃变温条件下的发芽率最高,达到53.33%。贝加尔针茅在昼夜温差为7.5～20.5℃的变温环境下发芽率最高,为25.67%。贝加尔针茅对发芽温度很敏感,而野大麦发芽适宜温度的范围较大。野大麦和贝加尔针茅种子萌发后,幼苗重量均随生长天数的增加而增加,胚乳的重量均随生长天数的增加而减少的变化趋势。幼苗重量与胚乳重量呈极显著的负相关关系。
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| 关 键 词： | 贝加尔针茅 野大麦 发芽率 胚乳重量 幼苗重量 |
| 文章编号： | 1009-5500(2004)01-0025-05 |
| 修稿时间： | 2003年6月7日 |
Effects of temperature on seed germination of two species of wild grasses |
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| Ding Xue-mei.Effects of temperature on seed germination of two species of wild grasses[J].Grassland and Turf,2004(1):25-29. |
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| Authors: | Ding Xue-mei |
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| Institution: | Ding Xue-mei~ |
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| Abstract: | The effects of different temperatures on germination capacity of two species of wild grasses were studied on the Songnen Plains of China. Eight temperature treatments were used included two constant temperatures and six variable temperatures. The results showed that variable temperatures resulted in improvement of the germination rates of the seeds of Hordeum brevisubulatum and Stipa baicalensis. The germination rate of H. brevisubulatum was the highest at the alternate temperature 20～ 30℃, which was 53.33%. The germination rate of S. baicalensis was the highest (25.67%) under the variable temperature with the temperature difference between day and night varying 7.5～ 20.5 ℃. S. baicalensis was sensitive to the temperatures, while the optimum germination temperatures of H. brevisubulatum varied largely. After the germination, H. brevisubulatum and S. baicalensis showed the same pattern: The weight of endosperm decreased with the days increasing and there was significant negative correlation between the weight of seedling and endosperm. |
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| Keywords: | Stipa baicalensis Hordeum brevisubulatum germination rate endosperm weight seedling weight |
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