| 掌叶大黄种子灌浆动态及其发芽特性研究 |
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| 引用本文： | 石有太,陈垣,郭凤霞,刘亚亚,屠彩芸. 掌叶大黄种子灌浆动态及其发芽特性研究[J]. 草业学报, 2009, 18(3): 178-183. DOI: 10.11686/cyxb20090325 |
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| 作者姓名： | 石有太 陈垣 郭凤霞 刘亚亚 屠彩芸 |
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| 作者单位： | 1.甘肃农业大学农学院,甘肃 兰州 730070;2.甘肃农业大学生命科学技术学院,甘肃 兰州 730070 |
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| 基金项目： | 国家"十一五"科技支撑计划项目，甘肃省科技攻关项目 |
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| 摘 要： | 选用甘肃礼县种植的三年生掌叶大黄种株,在盛花期挂牌标记开花一致的植株,开花第 10天开始通过定期测定籽粒千粒重、含水量和发芽率,对种子灌浆动态及其发芽特性进行研究,旨在为其种子标准化采收提供理论和技术依据。结果表明,三年生掌叶大黄千粒鲜重在开花后36 d达到最大,随后迅速下降到接近相应干重的水平。干重变化的趋势呈“S”型曲线,符合Logistic方程,快增期在花后13～36 d,灌浆速率呈“快-慢-快-慢”规律,因降雨出现2次低谷。籽粒脱水速率随灌浆进程加快,含水量持续下降。种子发芽势、发芽率和发芽指数在花后36 d内随灌浆递进均显著提高,之后出现差异,其与籽粒干重均呈极显著正相关,而与含水量呈显著负相关。上述结果说明掌叶大黄籽粒灌浆速率受天气的影响大,籽粒脱水加快是种子成熟的标志,成熟度对种子发芽具有显著影响,采收期应在花后46～52 d(7月上旬),种子含水率12%～16%,茎秆尚未枯萎时为最佳。
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| 关 键 词： | 掌叶大黄 籽粒灌浆 发芽特性 采收期 |
| 收稿时间： | 1900-01-01; |
Studies on filling dynamic and germination characteristics of Rheum palmatum seeds |
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| SHI You-tai,CHEN Yuan,GUO Feng-xia,LIU Ya-ya,TU Cai-yun. Studies on filling dynamic and germination characteristics of Rheum palmatum seeds[J]. Acta Prataculturae Sinica, 2009, 18(3): 178-183. DOI: 10.11686/cyxb20090325 |
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| Authors: | SHI You-tai CHEN Yuan GUO Feng-xia LIU Ya-ya TU Cai-yun |
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| Affiliation: | 1.College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China; 2.College of Life Science, Gansu Agricultural University, Lanzhou 730070, China |
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| Abstract: | Cards were hung as a flower sign in triennium Rheum palmatum plants cultivated in Li county of Gansu during blossom.The 1 000-grain weight,water content and seed germination in the plants were measured in period time after 10 d following the blossom day.Filling dynamic and germination characteristics of R.palmatum seeds were studied in order to provide theoretic basis for its seed standard production.The results showed that the 1 000-grain fresh weight increased and got at the highest value on the 36th day ... |
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| Keywords: | Rheum palmatum seed filling germination characteristic harvest time |
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