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中文摘要：
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。
英文摘要：
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.
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