不同处理方式对入侵杂草叶片凋落物化感作用的影响

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中图分类号：S451 文献标志码：A 文章编号：1003-935X（2025）03-0018-10

Effects of Methodological Differences on Allelopathy of Leaf Litter from Invasive Weeds

ZHANG Yi 1 ，GONG Zongzhi1，YAN Mengting1，LI Ying1，ZHANG Ruike¹，REN Xitong1 ， QI Shanshan²，REN Guangqian’，DAI Zhicong1，3，DU Daolin4 （1.School of the Environment and Safety Engineering，Jiangsu University，Zhenjiang 212O13，China; 2.School of Agricultural Engineering，Jiangsu University，Zhenjiang 212O13，China; 3.Suzhou University of Science and Technology/Jiangsu Collaborative Innovation Center of Technology andMaterialofWaterTreatment，Suzhou 215o9，China;4.Jingjiang Colege，Jiangsu University，Zhenjiang 212028，China）

Abstract：Toclarifyefectsofmethodologicaldiferencesonallelopathyofleaflitterfrominvasiveweeds，Sphagneticola trilobata（L.）Pruski，Solidago canadensis L.and Erigeron canadensis L.were selectedastheresearch objects，andLactuca sativa var.capitata was selectedas allelopathic indicator plant.Wesystematically evaluated effectsof diffrent conditios（i.e.，drying methods，aqueous extraction duration，and mass concentrationgradients）onalelopathic propertiesoftheirleavf liter.Theresultsshowedthatconcentrationof theextract increased，andallelopathyoflier increased forallthree invasive weeds，which wassignificantlycorrelatedwiththemass concentration of littr.The inhibition of medium （ 25g/L ）and high（ 50g/L ）concentration liter extract on lettuce was significant after soaking theleaf literfor24 hoursor48hours.Different drying methodshaddifferent effectsonalelopathy.For example，the air-dried S trilobata litter extract had the best inhibition.Interaction on alelopathy varied with plant species，and interaction between drying method and concentration was the most significant.Litters of S .trilobata and S .canadensis showed significant triple interaction on the seed germination and seedling biomass of .canadensis litter onlyshowedsignificanttriple interactiononseedlingbiomass.Therefore，allelopathyof invasive weeds litter highly corelated withconcentrationoflitterand soaking time，andallelopathy intensityof each invasive weedsalsovaries with thedrying method. While soaking time was prolonged，and alelochemicals were gradually approaching saturation.

KeyWords：invasiveweed;leaflitter;allelopathy;Lactucasativa;interation

外来植物入侵是当今世界最为严重的生态问题之一，它往往严重破坏本地生态系统的结构和功能。（剩余14429字）