白喉乌头水浸提液对禾本科牧草种子萌发的化感作用  

Allelopathy effects of Aconitum leucostomum aqueous extract on seed germination of four forage species

作　　者：徐彩芹[1] 安沙舟[1] 何君[1] 

机构地区：[1]新疆农业大学草业与环境科学学院新疆草地资源与生态实验室,新疆乌鲁木齐830052

出　　处：《草业科学》2012年第2期263-266,共4页Pratacultural Science

基　　金：新疆科技厅科技攻关项目"新疆草原主要毒害草防治技术开发及试验示范"(200831104)

摘　　要：采用培养皿滤纸法在人工气候箱中研究了白喉乌头(Aconitum leucostomum)水浸提液对4种禾本科牧草种子萌发的影响。结果表明,白喉乌头根和茎叶的水浸提液对4种牧草种子萌发率和萌发指数具有抑制作用,且根的抑制作用大于茎叶;对萌发指数影响大于萌发率;抑制作用随水浸提液质量浓度的增加而加大;4种牧草对白喉乌头化感作用敏感性从强到弱依次为无芒雀麦(Bromus inermis)、黑麦草(Lolium perenne)、草地早熟禾(Poapratensis)、苇状羊茅(Festuca arundinacea)。Effects of root and stem-leaf aqueous extracts of Aconitum leucostomum on seed germination of 4 forages was studied in a pot culture, experiment The result showed that the aqueous extracts of root and stem-leaf of A. leucostomum inhibited seed germination rates and germination indexes of the forages. Inhi- bition of root aqueous extract on germination rates and germination indexes was more severe than those of stem-leaf aqueous extract. The inhibiting effect on germination indexes was greater than on germination rates. The inhibiting effect was increased with the increase of concentration of aqueous extracts. The order of allelopathic sensitivity to A. leucostomum aqueous extracts was Bromus inermis〉Lolium perenne〉Poa pratensis〉 Festuca arundinacea.

关 键 词：化感作用 水浸提液 白喉乌头 牧草 

分 类 号：S452[农业科学—植物保护] Q945.34[生物学—植物学]