干旱区研究2014，Vol.31Issue(3)：530-535,6.
入侵植物刺苍耳对小麦和苜蓿种子的化感作用
Allelopathic Effect of Xanthium spinosum on Seeds of Triticum aestivum and Medicago sativa
摘要
Abstract
Xanthium spinosum is an annual invasive species,and it was originated from South American.It has a wide adaptability to barren soil and saline or alkaline soil as well as flood and drought conditions.Just because of its transmission capability,X.spinosum devastates the native biodiversity,plant distribution,community formation and intercrop evolution.In this paper,the aqueous extract from the roots,stems and leaves of X.spinosum,at concentrations of 0.012 5,0.250,0.050 g · mL-1 and 0.100 g · mL-1,was used as a treatment solution to study its allelopathic effect on seed germination of Triticum aestivum and Medicago sativa.The results revealed that the seed germination of T.aestivum and M.sativa was significantly inhibited by the aqueous extract at concentration ≥ 0.012 5 g · mL-1.All the aqueous extract of the roots,stems and leaves inhibited seed germination of T.aestivum and M.sativa,which not only reduced the germination rate of seeds but also prolonged the period of ultimate germination.The allelopathic effect of the aqueous extract was in an order of stem ＞ leaf ＞ root,and the effect was intensified at higher extract concentration.The results are of the theoretical significance and practical value in conducting biological control of exotic species and developing new biological pesticide.关键词
刺苍耳(Xanthium spinosum)/化感作用/小麦(Triticum aestivu)/紫花苜蓿(Medicago sativa)/种子萌发/植物入侵Key words
Xanthium spinosum / allelopathic effect/ Triticum aestivum / Medicago sativa / seed germination/ invasive plant引用本文复制引用
董芳慧,刘影,蒋梦娇,李海冰,胡云霞..入侵植物刺苍耳对小麦和苜蓿种子的化感作用[J].干旱区研究,2014,31(3):530-535,6.基金项目
伊犁师范学院“有机重点学科”项目(ylsyy003)资助 （ylsyy003）
