ALLELOPATHIC POTENTIAL OF WINTER CEREAL STRAWS

摘要

The leachates of winter cereal straws wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) of different part of organs were used in a bioassay test with lettuce (Lactuca sativa L.). The inhibitory effects of the straw leachates on lettuce seedling growth differed greatly with the each part of straws. The leachates from leaf blade of straws had the most inhibitory effects on the lettuce radicle growth and the effectiveness of leachates were not significantly different by leaf position. The inhibitory effects of the straw leachates in distilled water on barnyardgrass and rice seedling growth related to the hours after immersing straws in distilled water. The most inhibitory effect was founded after immersing straws in distilled water for 24 hours. Straw extract of each part of winter cereals were analyzed using high-performance liquid chromatography (HPLC). The results showed that the extracts from each part of winter cereal straws contained 16 phenolic compounds in which para- coumaric acid and ferulic acid were big amount. The amount of phenolic compounds in internode was more than in leaf blade of winter cereal straws.