| 硅对紫花苜蓿种子萌发及幼苗生长发育的影响 |
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| 引用本文： | 刘慧霞,申晓蓉,郭正刚.硅对紫花苜蓿种子萌发及幼苗生长发育的影响[J].草业学报,2011,20(1):155-160. |
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| 作者姓名： | 刘慧霞 申晓蓉 郭正刚 |
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| 作者单位： | 1.西北民族大学生命科学与工程学院,甘肃 兰州 730020;2.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： | 国家自然科学基金，中国博士后科学基金 |
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| 摘 要： | 在盆栽条件下证实了硅能够促进紫花苜蓿生长的基础上,研究了水培条件下硅对紫花苜蓿种子萌发和幼苗生长发育的影响。结果表明,硅对紫花苜蓿种子初始萌发时间和最终发芽率没有影响,但硅处理明显缩短了紫花苜蓿种子萌发所需时间,显著增加了发芽指数,种子活力和发芽势(P<0.05),说明硅不能改变紫花苜蓿种子品质的优劣,但能提高其活力。硅对紫花苜蓿幼苗茎叶和根系生长的影响并不一致,表现为硅处理紫花苜蓿幼苗茎长显著大于对照处理紫花苜蓿幼苗茎长(P<0.05),而硅处理紫花苜蓿幼苗根长和对照幼苗根长差异不显著。硅处理紫花苜蓿幼苗生物量显著大于对照处理紫花苜蓿生物量(P<0.05)。紫花苜蓿种子发芽指数,发芽势、幼苗根茎长度和生物量对硅的响应不存在浓度剂量效应。研究表明,硅至少直接参与了紫花苜蓿种子萌发和幼苗生长的生理生化过程,而且紫花苜蓿对硅的需求量相对较少。
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| 关 键 词： | 初始萌发时间 总发芽率 茎叶 根 生物量 |
| 收稿时间： | 1900-01-01; |
Effects of silicon addition on seed germination and seedling growth of alfalfa |
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| LIU Hui-xia,SHEN Xiao-rong,GUO Zheng-gang.Effects of silicon addition on seed germination and seedling growth of alfalfa[J].Acta Prataculturae Sinica,2011,20(1):155-160. |
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| Authors: | LIU Hui-xia SHEN Xiao-rong GUO Zheng-gang |
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| Institution: | 1.College of Life Science and Engineering, Northwest University for Nationalities, Lanzhou 730030, China; 2.College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China |
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| Abstract: | A previous pot experiment indicated that silicon addition encouraged alfalfa plants to grow and increased the biomass.Effects of silicon addition on seed germination and seedling growth of alfalfa using a water culture experiment were investigated in this study.Silicon addition had no effect on initial time of seed germination or on final germination rate.However,it enabled seeds to germinate faster and enhanced germination index,vigor index and germination energy,implying that silicon addition did not impr... |
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| Keywords: | initial germination time total germination percentage shoots roots biomass |
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