CAJ | 학술논문

包括紫茎泽兰在内的许多外来植物都能够与新入侵生境的丛枝菌根真菌（ AMF）形成互利共生，因此菌根真菌如何调节外来植物种的入侵是当前亟待研究的问题。测定了紫茎泽兰入侵不同阶段（紫茎泽兰呈零星丛状分布于本地植物群落中[部分入侵生境]及紫茎泽兰单优群落形成期[入侵生境]）的土壤化学性状，而后通过野外试验，采用杀真菌剂处理，研究了包括AMF在内的土壤真菌对紫茎泽兰入侵的反馈作用。紫茎泽兰入侵改变了土壤化学性状。施用杀真菌剂降低了紫茎泽兰叶面积、叶片碳、氮、磷、和δ13 C含量。综合分析发现，在紫茎泽兰与本地植物混生群落中，土壤真菌能够增加紫茎泽兰叶片碳和δ13 C含量，但是不能提高紫茎泽兰的光合作用，表明碳和δ13 C含量的提高，不是光合作用的结果，而是通过其他机制实现的。因此可以得出，在部分入侵生境中，碳从土壤或临近植物经由菌丝网向紫茎泽兰转移。紫茎泽兰入侵不同阶段土壤养分的变化利于紫茎泽兰种群建立，同时利于紫茎泽兰借助真菌（尤其是AMF）从土壤或临近植物转移碳，促进种群扩散，这可能是紫茎泽兰入侵的机制之一。
포괄자경택란재내적허다외래식물도능구여신입침생경적총지균근진균（ AMF）형성호리공생，인차균근진균여하조절외래식물충적입침시당전극대연구적문제。측정료자경택란입침불동계단（자경택란정령성총상분포우본지식물군락중[부분입침생경]급자경택란단우군락형성기[입침생경]）적토양화학성상，이후통과야외시험，채용살진균제처리，연구료포괄AMF재내적토양진균대자경택란입침적반궤작용。자경택란입침개변료토양화학성상。시용살진균제강저료자경택란협면적、협편탄、담、린、화δ13 C함량。종합분석발현，재자경택란여본지식물혼생군락중，토양진균능구증가자경택란협편탄화δ13 C함량，단시불능제고자경택란적광합작용，표명탄화δ13 C함량적제고，불시광합작용적결과，이시통과기타궤제실현적。인차가이득출，재부분입침생경중，탄종토양혹림근식물경유균사망향자경택란전이。자경택란입침불동계단토양양분적변화리우자경택란충군건립，동시리우자경택란차조진균（우기시AMF）종토양혹림근식물전이탄，촉진충군확산，저가능시자경택란입침적궤제지일。
Background Many alien plant species including Ageratina adenophora can establish a mutualistic symbiotic relationship with arbuscular mycorrhizal fungi (AMF) in their newly invaded habitats.Therefore, how these alien species invasions are mediated by mycorrhizal fungi urgently needs to be explored .[Method]To explore the feedback of soil fungi , including AMF to the invasive plant A.adenophora, the soil chemical properties at different invasion stages ( A.adenophora grown with native plants around [ Par-tially invaded habitats ];and grown as its single species [ Invaded habitats ] ) were measured , and then the feedback of soil fungi in-cluding AMF to A.adenophora were investigated in the field with fungicide treatment .[Result]The chemical properties of soil were changed under A.adenophora invasion.Fungicide decreased the leaf area, carbon, nitrogen, phosphorus, andδ13C content of A.ad-enophora.[Conclusion and significance]Synthetic analysis found that soil fungi increased the carbon and the δ13 C content of A.ade-nophora leaves, but didn′t increase the photosynthesis of A.adenophora in partially invaded habitats , indicating that the increased carbon andδ13 C content of A.adenophora leaves was not the result of photosynthesis but of some other mechanism .We supposed that carbon was transported from the soil or adjacent native weeds to A.adenophora through a mycelial network in partially invaded habi-tats.The changes in soil nutrients at different invasion phases may be one mechanism of A.adenophora invasion, and favors its es-tablishment via fungi especially AMF , and transfer of carbon from soil or native plants stimulates its further spread .