摘要
丛枝菌根真菌(AMF)有利于促进植物对养分的吸收,但是不同种类AMF在促进植物氮(N)、磷(P)养分吸收以及它们的流失方面是否存在明显的差异仍不清楚。以与AMF共生的杉木(Cunninghamia lanceolata)幼苗为研究对象,通过向其接种不同种类AMF(摩西球囊霉、根内根孢霉和幼套近明球囊霉)探究不同种类AMF接种及接种后不同时间段对杉木N、P吸收与流失的影响。结果发现,AMF能显著提高杉木幼苗的苗高、根长、干重、根体积、根表面积和根系侵染率。摩西球囊霉比其他两种AMF更有利于提高杉木幼苗的根长、根表面积和根体积。AMF接种有助于提高植物对N、P的吸收,而且摩西球囊霉对植物N吸收的促进作用最强。不同种类AMF对杉木P吸收的促进作用主要表现在接种的初期,接种根内根孢霉更有利于促进杉木P吸收。AMF接种减少杉木幼苗土壤中NO_(3)^(-)-N和NH_(4)^(+)-N的流失,其中根内根孢霉对NH_(4)^(+)-N和NO_(3)^(-)-N的减少效果最显著。此外,AMF能有效减少土壤P素的流失,与其他AMF相比,摩西球囊霉显著降低了接种前期全P、颗粒态P、有机P、可溶性P的流失;在接种后期,幼套近明球囊霉显著降低了无机P与可溶性P的流失。总体而言,摩西球囊霉更有利于促进杉木N吸收,而根内根孢霉更有利于促进杉木P吸收。不同种类AMF接种在减少土壤N、P流失方面存在明显的种类与时间差异。
Arbuscular mycorrhizal fungi(AMF)play an important role in enhancing plant nutrient uptake.However,it remains unclear whether there are significant differences among various AMF species in promoting plant nitrogen(N)and phosphorus(P)uptake and reducing nutrient losses.Therefore,this study focused on Cunninghamia lanceolata that can form a symbiotic relationship with AMF,a major host plant of AMF.Different AMF species,including Glomus mosseae(Gm),Glomus intraradices(Gi),and Claroideoglomus etunicatum(Ce),were inoculated to investigate their effects on N and P uptake and losses in Cunninghamia lanceolata at different time after inoculation.Results showed that AMF significantly increased the height,root length,dry weight,root volume,root surface area,and root volume of the Cunninghamia lanceolata seedlings.Glomus mosseae was more effective than the other two AMF species in enhancing root length,root surface area,and mycorrhizal colonization rate of Cunninghamia lanceolata seedlings.Inoculation of AMF improved N and P uptake.Specifically,Glomus mosseae inoculation could promote plant N uptake most compared with other two AMF inoculation.The promoting effect of different AMF species on plant P uptake mainly occurred at the early stage of AMF inoculation.Moreover,Glomus intraradices was more beneficial for P uptake compared with the other two AMF species.AMF inoculation reduced the losses of NO_(3)^(-)-N and NH_(4)^(+)-N in the soil,and this effect was most pronounced in plant inoculated with Glomus intraradices.Additionally,AMF effectively decreased P losses from the soil.Compared with other AMF species,Glomus mosseae significantly reduced the losses of total P,particulate P,organic P,and soluble P in the early stage after AMF inoculation,while Claroideoglomus etunicatum significantly reduced inorganic P and soluble P losses in the later stage of AMF inoculation.Overall,Glomus mosseae was more beneficial for enhancing N uptake of Cunninghamia lanceolata,whereas Glomus intraradices was more effective in promoting P uptake.The effects of AMF inoculation on soil N and P losses depended on both the AMF species and the timing of inoculation.
作者
祝嘉新
雷梅
黄智军
丘清燕
胡亚林
ZHU Jiaxin;LEI Mei;HUANG Zhijun;QIU Qingyan;HU Yalin(College of Forestry,Fujian Agricultural and Forestry University,Fuzhou 350002,China;College of Mycology and Ecology,Fujian Agricultural and Forestry University,Fuzhou 350002,China)
出处
《生态学报》
北大核心
2025年第17期8474-8484,共11页
Acta Ecologica Sinica
基金
福建省科技厅自然科学基金项目(2023J01433)
国家自然科学基金项目(32471829)。
关键词
丛枝菌根真菌
氮磷吸收
氮磷流失
杉木幼苗
arbuscular mycorrhizal fungi
nitrogen and phosphorus uptake
nitrogen and phosphorus loss
Chinese fir seedlings
作者简介
通讯作者:丘清燕,E-mail:qingyan_qiu@126.com。
