摘要
用生物检测方法分别检测小花山桃草地上器官和地下器官不同浓度的水浸出液对矮牵牛、狗尾草和牛筋草3种杂草种子的发芽势和发芽率的影响,旨在研究小花山桃草是否存在化感作用.结果表明:①小花山桃草地上器官和地下器官水浸出液对供试种子萌发都有一定的抑制作用,其中对矮牵牛种子的抑制作用最强;②所有的水浸出液对发芽势的影响比对发芽率的影响显著;③不同器官的水浸出液抑制强度大小依次为地上器官>地下器官;④同一器官不同浓度的抑制强度不同,其趋势为高浓度>低浓度.
The allelopathy of water extracts from different organs of Gaura parviflora Douglas on germination of three kinds of weed seeds was studied. The results showed： （1）The water extracts from all organs of Gaura parviflora Douglas could inhibit seed germination in all the three species,Petunia hybrida vilm was the most sensitive one to the extracts. （2）Seed germination energy was more sensitive to the extracts than seed germination percentage. （3）Water extracts from different organs had different effects：the effect of above-ground organ was more apparent than the effect of under-ground organ. （4）The effect was concentration dependent,increasing with the increase of concentration.
出处
《河南科学》
2008年第12期1484-1487,共4页
Henan Science
基金
国家重点基础研究发展规划项目"外来植物物种编目与生态安全评价"(G200048603-4)
关键词
小花山桃草
化感作用
水浸出液
发芽势
发芽率
Gauraparviflora Douglas
allelopathy
water extracts
germination energy
germination percentage
