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Soil Fungal Community Structure Changes in Response to Different Long-Term Fertilization Treatments in a Greenhouse Tomato Monocropping System

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Phyton-International Journal of Experimental Botany 2021年第4期90卷 1233-1246页

作者： Xiaomei Zhang Junliang Li Bin Liang College of Resource and Environment Qingdao Agricultural UniversityQingdao266109China

Greenhouse vegetable cultivation(GVC)is an example of intensive agriculture aiming to increase crop yields by extending cultivation seasons and intensifying agricultural *** with cropland,studies on the effects of farming management regimes on soil microorganisms of the GVC system are rare,and our knowledge is *** the present study,we assessed the impacts of different long-term fertilization regimes on soil fungal community structure changes in a greenhouse that has been applied in tomato(Solanum lycopersicum L.)cultivation for 11 consecutive *** showed that,when taking the non-fertilizer treatment of CK as a benchmark,both treatments of Conventional chemical N(CN)and Organic amendment only(MNS)significantly decreased the fungal richness by 16%–17%,while the Conventional chemical N and straw management(CNS)restored soil biodiversity at the same *** and pathotroph were the major trophic modes,and the abundance of the pathotroph fungi in treatment of CNS was significantly lower than those in CK and CN *** CNS treatment has significantly altered the fungal composition of the consecutive cropping soils by reducing the pathogens,e.g.,Trichothecium and Lecanicillium,and enriching the plant-beneficial,e.g.,*** CNS treatment is of crucial importance for sustainable development of the GVC system.

关键词： continuous cropping straw return FUNGuild biocontrol agent

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cultivated Atractylodes lancea

cultivated Atractylodes lancea

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第九届中国林业青年学术年会

作者： L.P.GUO 1 B.DCHEN (2,5) Y.L.CHEN 3 L.Q.HUANG 1 Y.X. JIANG 4 Y.ZENG 1 (1.Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences,Beijing,China 2.Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China 3.School of Plant Biology M084, University of Western Australia,Perth WA 6009,Australia 4.Institute of Forestry,Chinese Academy of Forestry,Beij ing 100091,China 5.Present address:National Institute of Livestock and Grassland Science,768 Senbonmatsu,Nasushiobara, Tochigi 329-2793,Japan)

Atractylodes lancea is one of widely used medicinal herbs in oriental *** current practice of continuous cropping of this plant leads to a dramatic lose of *** aim of this study was to investigate the potential allelochemical autotoxicity involving continuous cropping. Rhizome and rhizosphere soil extracts were collected from 8-month old Atractylodes lancea plants grown in a glasshouse to examine their bioactivity and allelopathic *** in vitro experiment was established to test the autotoxicity of rhizome extracts and rhizosphere extracts on early development of *** results showed a general increasing trend of inhibitory effect on seed germination and early development of *** plants with the increase of concentration of *** development of radicles and embryos of seeds treated with higher concentrations of either rhizosphere soil extract(500 mg ml"1) or rhizome extract(200 mg ml"1) were substantially inhibited.A total of 20 compounds were identified from rhizome extracts and 27 compounds from rhizosphere soil extracts by *** phytotoxic compounds,including 2,5-octadecadlynoic acid,methyl ester,n-hexadecanoic acid, pentadecanal,tetradecanoic acid,1-naphthalenol,butylated hydroxytoluene,2-methoxy-4-vinylphenol, were detected in both *** similarities of compounds between rhizome and rhizosphere soil extracts were evaluated by Jaccard coefficient,which ranged from 33%when extracted by diethyl ether to 90%when extracted by ethyl acetate.β-eudesmol and hinesol,which were the main components of naphtha in ***,were found in rhizome extracts.A following up in vitro experiment was then conducted under controlled conditions to examine the autotoxicity ofβ-eudesmol,which showed the significantly inhibited development of embryo of *** seeds treated with two higher rates ofβ-eudesmol(100 and 250 mg l).This result confirmed the autotoxicity ofβ-eudesmol and rhizome extracts *** well-de

关键词： Atractylodes lancea allelopathy,autotoxicity allelochemical compounds rhizome extracts rhizosphere soil extracts continuous cropping

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