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草业学报 ›› 2015, Vol. 24 ›› Issue (7): 106-115.DOI: 10.11686/cyxb2014430

• 研究论文 • 上一篇    下一篇

室温干燥贮藏和天然高寒草甸层积对草玉梅种子萌发的影响

鱼小军1, 王芳2, 张婧1, 徐长林1, 肖红1, 景媛媛1, 张建文1, 杨海磊1   

  1. 1.甘肃农业大学草业学院,草业生态系统教育部重点实验室,中-美草地畜牧业可持续发展研究中心,甘肃省草业工程实验室,甘肃 兰州730070;
    2.甘肃农业大学农学院,甘肃 兰州 730070
  • 收稿日期:2014-10-21 出版日期:2015-07-20 发布日期:2015-07-20
  • 作者简介:鱼小军(1977-),男,甘肃陇西人,副教授,博士。E-mail:yuxj@gsau.edu.cn
  • 基金资助:
    国家自然科学基金地区项目(31360570)资助

The effects of dry storage at room temperature and stratification at natural alpine meadow on seed germination of Anemone rivularis

YU Xiao-Jun1, WANG Fang2, ZHANG Jing1, XU Chang-Lin1, XIAO Hong1, JING Yuan-Yuan1, ZHANG Jian-Wen1, YANG Hai-Lei1   

  1. 1.Pratacultural College, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem of Ministry of Education, Sino-U.S. Centers for Grazing and Ecosystem Sustainability, Pratacultural Engineering Laboratory of Gansu Province, Lanzhou 730070, China;
    2. College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2014-10-21 Online:2015-07-20 Published:2015-07-20

摘要: 明晰草玉梅种子休眠的释放,为草地管理和草玉梅的栽培提供基础,研究了室温干燥贮藏和高寒草甸层积对草玉梅种子萌发特征的影响。结果表明,室温干燥贮藏天数不同、是否去掉果皮和是否光照影响了草玉梅种子的初始发芽天数、发芽率和发芽指数。随着贮藏天数的增加,去掉果皮草玉梅种子的初始发芽天数呈不同程度的减小,发芽率和发芽指数呈不同程度的增加。室温贮藏40~180 d的草玉梅种子,去掉或未去掉果皮后光照条件下的初次发芽天数显著低于贮藏0 d处理(P<0.05)。室温贮藏40,80,150和180 d的草玉梅种子在去掉果皮光照处理下,其发芽率间的差异不显著(P>0.05),但皆显著高于贮藏0 d处理(P<0.05)。室温贮藏180 d的草玉梅种子未去掉果皮光照下的发芽率显著高于贮藏80和150 d处理(P<0.05),后两者显著高于贮藏40 d处理(P<0.05),贮藏40 d 处理又显著高于贮藏0 d处理(P<0.05)。光照不同程度地降低了草玉梅种子的初始发芽天数,提高了草玉梅种子的发芽率和发芽指数。高寒草甸土壤中冷季层积处理不同程度地降低了草玉梅种子的初次发芽天数,提高了发芽率和发芽指数。践踏层积的草玉梅种子在30/20℃和20/10℃变温条件下的初次发芽天数分别显著低于层积不践踏处理(P<0.05)。践踏层积的草玉梅种子在25/15℃和20/10℃变温条件下的发芽率(分别为38.0%和35.3%),显著高于层积不践踏处理(22.7%和14.0%);室温贮藏同期(11月-4月)未去掉果皮的草玉梅种子未能发芽。当年10月成熟后层积于天祝高寒草甸放牧地的草玉梅种子,至次年8月底有40.2%的发芽;未发芽的草玉梅种子在培养箱30/20℃到20/5℃的温度范围均能发芽,在30/20℃最高,仅为15.3%,绝大多数种子处于休眠。

Abstract: In order to clarify conditions needed for the seed dormancy release of Anemone rivularis, and provide reference information for grassland management and A. rivularis cultivation, the effects on A. rivularis seed germination characteristics of dry storage at room temperature and stratification in natural conditions in an alpine meadow were studied. Storage time, peeling and illumination affected the time required for germination, germination percentage and germination index of A. rivularis seed. With increased storage time, time required for germination of peeled A. rivularis seeds decreased and the germination percentage and germination index increased to different degrees. With illumination, the number of days required for germination of both peeled and unpeeled A. rivularis seeds stored for 40 to 180 days was significantly lower (P<0.05) than that of the same seeds without storage. There were no significant differences in the germination of peeled A. rivularis between seeds stored for 40, 80, 150 or 180 days although germination was always significantly higher (P<0.05) than that of same seeds without storage. The germination of unpeeled A. rivularis seeds stored at room temperature for 180 days was significantly higher (P<0.05) than that of same seeds stored for 80 and 150 days, which in turn was significantly higher (P<0.05) than that of same seeds stored for 40 days. All of the germination percentages of unpeeled A. rivularis seeds with storage were significantly higher (P<0.05) than those of same seeds without storage. Both illumination and stratification in a natural alpine meadow during the cold season reduced the days required for germination of A. rivularis seeds and improved germination percentage and germination index. The time required for initial germination of A. rivularis seeds with stratification and trampling and subject to alternating temperatures of 30/20℃or 20/10℃ was significantly shorter (P<0.05) than that of seeds subjected to stratification without trampling under the same germination conditions. The germination of A. rivularis seeds with treatments comprising stratification and trampling at alternating temperatures of 25/15℃ and 20/10℃was 38.0% and 35.3%, respectively, which was significantly higher (P<0.05) than that of treatments comprising stratification without trampling under the same germination conditions (22.7% and 14.0%, respectively). However, unpeeled A. rivularis seeds stored dry at room temperature in the same period (November to April) did not germinate. Un-germinated A. rivularis seeds had a 40.2% germination rate after stratification in Tianzhu alpine meadow from October to August in the following year. Un-germinated seeds could also germinate under alternating temperature regimes ranging from 30/20℃ to 20/5℃ with the highest observed germination percentage being 15.3%at 30/20℃.This indicates that the majority of seeds still remained dormant after initial treatment.