Mexican devil [Ageratina adenophora (Spreng.) R.M. King & H. Rob.], a globally invasive weed with destructive effects on forests, has spread to numerous countries. To elucidate the inhibition of tree growth by A. adenophora, a study was conducted using the fungi (Lactarius deliciosus, Ceriporia lacerata, and Fomitopsis palustris) involved in the recycling of carbon and nutrients in forests. The focus was on investigating soil nitrogen and phosphorus availability in response to aqueous extracts from uncomposted and aerobically composted A. adenophora (EUA and ECA, respectively). The samples of composted A. adenophora from different sites exhibited a significant reduction in the concentration of allelochemicals 4,7-dimethyl-1-(propan-2-ylidene)-1,4,4a,8a-tetrahydronaphthalene-2,6(1H, 7H)-dione and 6-hydroxy-5-isopropyl-3,8-dimethyl-4a,5,6,7,8,8a-hexahydronaphthalen-2(1H)-one. This reduction more than 94% when compared with the concentration of these allelochemicals in CA. The EUA solutions at 5 and 10 mg L−1 (oven-dried plant biomass base) minimized L. deliciosus and C. lacerata growth, and significantly decreased F. palustris growth on the soil surface and within the soil. However, soil with ECA had no effect or promoting effect on the fungal growth. Compared with CK (only fungal inoculation in tested soil), the EUA solution reduced soil nitrogen and phosphorus, while ECA had the opposite effect; soil pH was increased by 0.01 to 0.08 under EUA treatment, while it decreased by 0.5 to 0.41under ECA treatment. Nitrogen and phosphorus availability were positively correlated with protease and phosphatase activity (r = 0.723 to 0.944), while available phosphorus was inversely correlated with pH in tested soils (r = -(0.809 to 0.978)). As such, the EUA solution decreased soil nitrogen and phosphorus supplies by inhibiting the liberation of proteases, phosphatases, and protons, which may lead to poor growth or even mortality of three fungal species. The in situ aerobically composted A. adenophora residues left behind may directly supply fungal species with nutrients and indirectly increase soil nutrient availability via the promotion of nitrogen and phosphorus mobilization.

墨西哥恶魔[ Ageratina adenphora (Spreng.) RM King & H. Rob.]是一种对森林造成破坏性影响的全球入侵杂草，已蔓延到许多国家。为了阐明紫茎泽兰对树木生长的抑制作用，利用参与森林碳和养分循环的真菌（Lactarius deliciosus、Ceriporia lacerata和Fomitopsis palustris ）进行了一项研究。重点是调查土壤氮和磷的有效性，以响应未堆肥和需氧堆肥紫茎泽兰（分别为 EUA 和 ECA）的水提取物。不同地点的堆肥紫茎泽兰样品中化感物质4,7-二甲基-1-(丙-2-亚基)-1,4,4a,8a-四氢萘-2,6(1H)的浓度显着降低，7H)-二酮和6-羟基-5-异丙基-3,8-二甲基-4a,5,6,7,8,8a-六氢萘-2(1H)-酮。与 CA 中这些化感物质的浓度相比，这种减少超过 94%。5 和 10 mg L -1的 EUA 溶液（以烘干的植物生物量为基础）最大限度地减少了美味乳杆菌和裂齿 C. lacerata 的生长，并显着减少了土壤表面和土壤内沼泽镰刀菌的生长。然而，含有ECA的土壤对真菌生长没有影响或促进作用。与CK（测试土壤仅接种真菌）相比，EUA溶液降低了土壤氮、磷，而ECA则具有相反的效果；EUA处理下土壤pH值升高0.01~0.08，ECA处理下土壤pH值降低0.5~0.41。氮和磷的有效性与蛋白酶和磷酸酶活性呈正相关（r = 0.723至0.944），而有效磷与测试土壤的pH值呈负相关（r = -（0.809至0.978））。因此，EUA 溶液通过抑制蛋白酶、磷酸酶和质子的释放来减少土壤氮和磷的供应，这可能导致三种真菌生长不良甚至死亡。原位好氧堆肥留下的紫茎泽兰残留物可以直接为真菌物种提供养分，并通过促进氮和磷的动员间接增加土壤养分的有效性。