独活浸提液对稗草、千金子的化感作用

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中图分类号：S451 文献标识码：A 文章编号：1006-060X（2026）01-0060-06

Abstract：ThisstudyaimstoclarifythealelopathicefectofAngelicapubesensextractonEchinochloacrusgaliandLeptochloa chinensis.Polaritygadientextractionwereemployedtoobtainthepetrolemetherextract，dicloromethaneextract，ethylacetate extract，methanol extract and aqueous extract of A .pubescens.With seed germination rate，root length， stem length，and biomassas indicators，the comprehensive allelopathic effect of different extractsof A pubescenson E crusgalli and L .chinensisweredetermined by the petri dish method. The results showed that the five extracts of A .pubescens had significantly different inhibitory effect on E crusgalli and L chinensis，withtheethylacetate extractshowingthestrongestinhibitoryefect.Specifically，theethylacetateextract at 10， 20，and 30mg/L showed the inhibition rates of 100% on all the seed germination rate， root length，and stem length of E crusgalli and 15.73% ， 55.27% ，and 95.35% on the biomass of E .crusgali seeds，respectively. The inhibition rates of 30mg/L ethyl acetate extracton the seed germination rate，root length， stem length，and biomass of L.chinensis were 69.06% 81.85% 70.93% ，and 82.53% respectively.Teoveralliibitorectofdieretextrctsonteseedgenationraterootlength，stemlengthndioasof E crusgalli and L .chinensis followed the trendof ethyl acetateextract > dichloromethane extract > methanol extract > petroleum ether extract > aqueous extract.The results indicated that the weed control components of A .pubescensweremainly enrichedin theethyl acetate extract.

Keywords：Angelicapubesens;polarityaientextraction;alelopathicffect;Ehnohocusgali;Leptohloch

稗[Echinochloacrus-galli（L.）]、千金子[Leptochloachinensis（L.）Nees为稻田一年生禾本科主要恶性杂草[1-3]。（剩余8648字）