| 两种雀麦种子萌发期耐热性比较研究 |
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| 引用本文： | 李景环,李青丰.两种雀麦种子萌发期耐热性比较研究[J].干旱区资源与环境,2001(Z1). |
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| 作者姓名： | 李景环 李青丰 |
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| 作者单位： | 内蒙古师范大学生物系 呼和浩特010022
(李景环)，内蒙古农业大学生态环境学院 呼和浩特010019(李青丰) |
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| 基金项目： | “优良牧草种子生产基地的建立”(中科院知识创新工程课题 KSCX10 8-0 3-0 7)，“北方主要牧草种子生产的研究”
(农业部 95重点课题 ) |
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| 摘 要： | 设置了八个变温梯度 ,三种播前预措方式及一个对照 ,分别对两种雀麦 (沙地雀麦Bromus ircutensis和无芒雀麦 Bromusinermis)种子进行萌发测试。测定了不同处理下的发芽率、发芽指数、休眠率和死亡率 ,并依此比较了这两种牧草种子在萌发期的耐热性能。结果表明 ,从发芽率和发芽指数看 ,二者并无明显的差异 ( P<0 .0 5) ,在较低的温度下二者都有较高的发芽率和发芽指数 ,当温度超过 45℃时二者都不萌发。从休眠和死亡状况可知 ,沙地雀麦种子比无芒雀麦种子有较强的耐高温性。三种预措方式中 ,三次回干效果较好
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| 关 键 词： | 沙地雀麦 无芒雀麦 种子萌发 吸水-回干处理 |
A Study on Heat Tolerance of Two Bromus Species During Seed Germination |
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| LI Jing-huan,LI Qing-feng.A Study on Heat Tolerance of Two Bromus Species During Seed Germination[J].Journal of Arid Land Resources and Environment,2001(Z1). |
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| Authors: | LI Jing-huan LI Qing-feng |
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| Institution: | LI Jing-huan 1 LI Qing-feng 2 |
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| Abstract: | The effects of high temperature and hydration-dehydration pre-treatments on seed germination of Bromus ircutensis kom and Bromus inermis Leysis were observed. The results showed that the two Bromus seeds had good germination performance at temperature regimes of 5/30℃ and 5/25℃. B. ircutensis had higher tolerance to high temperature than B. inermis did. Three cycles of hydration-dehydration treatment was better than the other treatments in terms of germination percentage and germination index. |
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| Keywords: | Bromus inermis Leysis Bromus ircutensis kom seed germination hydration and dehydration |
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