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生态学杂志 ›› 2011, Vol. 30 ›› Issue (10): 2115-2121.

• 研究报告 •    下一篇

青藏高原东缘31种常见杂草种子萌发特性及其与种子大小的关系

张蕾1,张春辉1,吕俊平1,王晨阳2,张莹莹1,卜海燕1,杜国祯1**   

  1. 1兰州大学干旱与草地生态教育部重点实验室, 兰州 730000;2兰州大学草地农业科技学院, 兰州 730000
  • 出版日期:2011-10-08 发布日期:2011-10-08

Seed germination characteristics and their correlations with seed sizes of 31 common weeds in eastern Qinghai-Tibet Plateau. 

ZHANG Lei1, ZHANG Chun-hui1, LÜ Jun-ping1, WANG Chen-yang2, ZHANG Ying-ying1, BU Hai-yan1, DU Guo-zhen1**   

  1. 1Laboratory of Arid and Grassland Ecology, Ministry of Education, Lanzhou University, Lanzhou 730000, China; 2College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China
  • Online:2011-10-08 Published:2011-10-08

摘要: 以青藏高原东缘31种常见杂草(禾本科、菊科和紫草科)植物种子为对象,在野外实验条件下,观测了其萌发特性,并对其萌发模式以及种子大小和萌发特征的关系进行了分析,以期对当地的杂草防治提供理论依据。结果表明,这些植物种子的萌发模式可以分为以下4种类型:爆发型、过渡型、缓萌型和低萌型。其中过渡型和缓萌型所占比例最大(各占32.3%),爆发型次之(25.8%),低萌型最小(9.7%)。高峰萌发率与种子大小呈显著负相关,萌发高峰时间与种子大小呈显著正相关,萌发率、萌发指数与种子大小呈较弱的负关联,萌发开始时间与种子大小呈较弱的正关联,萌发持续时间与种子大小几乎无相关关系。

关键词: 生物量, 周转值, 撂荒地

Abstract: A field observation was conducted to study the seed germination characteristics and their correlations with seed sizes of 31 common weeds in the families Gramineae, Compositae, and Boraginaceae in eastern Qinghai-Tibet Plateau, aimed to provide theoretical bases for local weed control. It was found that the seed germination had four patterns, i.e., rapid, intermediate, slow, and low, with the proportions being 25.8%, 32.3%, 32.3%, and 9.7%, respectively. The peak germination percentage had a significant negative correlation with seed size, while the peak germination time was in adverse. Both the germination percentage and the germination index had a weak negative correlation with seed size, the starting time of germination was weakly positively correlated to seed size, and no correlation was observed between germination duration and seed size.

Key words: Biomass, Turnover value, Land remained bare