| 垂穗披碱草种子的萌发适宜温度及温度阈值 |
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| 引用本文： | 曾霞,王彦荣,胡小文.垂穗披碱草种子的萌发适宜温度及温度阈值[J].草业科学,2011,28(6):988-992. |
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| 作者姓名： | 曾霞 王彦荣 胡小文 |
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| 作者单位： | 兰州大学草地农业科技学院,甘肃兰州,730020;兰州大学草地农业科技学院,甘肃兰州,730020;兰州大学草地农业科技学院,甘肃兰州,730020 |
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| 基金项目： | 国家重点基础研究发展计划(973项目)(2007CB108904); 国家自然科学基金(30771532); 兰州大学中央高校基本科研业务费专项资金(lzujbky-2009-5) |
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| 摘 要： | 摘要：以采集于甘肃省和青海省等地的8份垂穗披碱草(Elymus nutans)种质为材料，采用纸上发芽法在5、10、15、20、25、30、35和40 ℃ 8个恒温条件下，研究种子的萌发适宜温度和温度阈值。结果表明，所有供试垂穗披碱草种子在5～35 ℃条件下可萌发，在40 ℃不萌发；以20、25和30 ℃发芽最快，发芽率在3 d内可达最大值，根据种子萌发温度模型计算得出，供试垂穗披碱草种子萌发的最低温度(Tb)、最适温度(To)和最高温度(Tc)的平均值分别为4、24和38 ℃，种质间无显著差异(P＞0.05)。建议垂穗披碱草种子的适宜检验温度为20、25和30 ℃恒温，初次和末次的适宜统计时间分别为第3天和第11天。
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| 关 键 词： | 种子萌发 垂穗披碱草 萌发温度 温度阈值 |
Research on seed germination optimum temperature and temperature threshold of Elymus nutans |
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| ZENG Xia,WANG Yan-rong,HU Xiao-wen.Research on seed germination optimum temperature and temperature threshold of Elymus nutans[J].Pratacultural Science,2011,28(6):988-992. |
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| Authors: | ZENG Xia WANG Yan-rong HU Xiao-wen |
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| Institution: | ZENG Xia,WANG Yan-rong,HU Xiao-wen(College of Pastoral Agriculture Science and Technology,Lanzhou University,Gansu Lanzhou 730020,China) |
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| Abstract: | The germination appropriate temperature and temperature threshold of Elymus nutans seeds for eight populations which were collected from Gansu Province and Qinghai Province were studied.The germination tests were subjected to 8 temperature treatments which were 5,10,15,20,25,30,35 and 40 ℃.The results showed that the seeds could germinate from 5 to 35 ℃,and was inhibited by 40 ℃.The germination and germination index had no significant differences(P>0.05) under 20,25 and 30 ℃.According to the seed germination thermal model(T,℃),the seed germination temperature threshold was calculated.Tb,To and Tc of all E.nutans germplasm had no significant differences(P>0.05),their average were 4,24 and 38 ℃.We suggested that the temperature which was suitable for inspectioning of E.nutans were 20,25 and 30 ℃,and the germination count time of the first time and the last time were the third day and the eleventh day,separately. |
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| Keywords: | seed germination Elymus nutans germination temperature temperature threshold |
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