热带作物学报2011，Vol.32Issue(1)：55-60,6.DOI:10.3969/j.issn.1000-2561.2011.01.011
臭草水浸提液化感作用研究
Laboratory Assessment of the Allelopathic Potential of Aqueous Extracts of Praxelis clematidea
摘要
Abstract
The allelopathic effect of aqueous extracts of fresh Praxelis(Praxelis clematidea)material on germination and of all extracts from fresh and dry Praxelis material on initial seedling growth were studied on the following crops: Chinese cabbage(Brassica campestris L. ssp. Pekinensis(lour.)Olsson), radish(Raphanus sativus L.), rice (Oryza sativa L.) and Stylosanthes CIAT184(Stylosanthes guianensis cv. Reyan No. 2). Allelopathic effect of extracts of Praxelis in various habitats were also studied. All aqueous extracts from fresh Praxelis inhibited seed germination of all four test species. Leaf and whole plant extracts exhibited greater phytotoxicity than extracts from other plant parts. Leaves might be the parts of Praxelis that mainly released the allelochemicals. Dry matter extracts of Praxelis severely inhibited the root growth of the crop species and there was an indication of a similar trend with extracts of fresh material at lower concentrations. Allelopathic activity of P. clematidea increased under adverse(arid or nutriental stress)conditions under which more allelochemicals might be released.关键词
假臭草/化感作用/水浸提液/种子发芽/幼苗生长Key words
Praxelis clematidea/ Allelopathy/ Aqueous extracts/ Seed germination/ Seedling growth分类
社会科学引用本文复制引用
王真辉,陈文庆,杨礼富,袁坤,陈秋波..臭草水浸提液化感作用研究[J].热带作物学报,2011,32(1):55-60,6.基金项目
国家自然科学基金项目(30960088). （30960088）
