Chang, Shenghua

Hou, Fujiang

Jin, Liang

Wang, Chang

Wang, Xiaojuan

Zhang, Guiqi

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Effects of Grazing on AM Colonization and Spore Density in Arid Grasslands of Loess Plateau Liang Jin Lanzhou University, China Chang Wang Lanzhou University, China Fujiang Hou Lanzhou University, China Shenghua Chang Lanzhou University, China Guiqi Zhang Lanzhou University, China See next page for additional authors Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/2-1/19 The 21st International Grassland Congress / 8th International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. Presenter Information Liang Jin, Chang Wang, Fujiang Hou, Shenghua Chang, Guiqi Zhang, and Xiaojuan Wang This event is available at UKnowledge: https://uknowledge.uky.edu/igc/21/2-1/19 瞯 ]314　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　Grasslands/Rangelands Resources and Ecology ——— Soil Quality and Plant NutritionEffects of grazing on AM colonization and spore density in arid grasslands of Loess PlateauL iang Jin , Chang W ang , Fuj iang Hou , Shenghua Chang , Guiqi Zhang , X iao j uan W ang 倡College o f Pastoral A griculture Science and Technology , L anz hou University , Gansu Grassland Ecological ResearchInstitute . P .O . Box 61 , Lanzhou 730020 , China . 倡 Correspondence author摧s E‐mail : xiaojuanwang＠ lzu .edu .cnKey words : arbuscular mycorrhizal fungi , herbivores , Loess PlateauIntroduction Arbuscular mycorrhizal fungi ( AMF) form symbioses with the roots of the majority of terrestrial plant species .These associations are generally considered mutualistic to both plants and fungi . However , few studies foucsed on therelationships among AMF , plants , and herbivores . The objective of this study was to investigate the effects of grazing on AMin arid grasslands of the Loess Plateau .Materials and methods This study was conducted in Huanxian Ecological Research Area of Lanzhou University ( N３７°１２′ , E１０６°８２′) , located in Loess Plateau , Gansu Province , China . Four grazing intensity plots ( ０ , ２畅７ , ５畅３ and ８畅０ sheep hm２ ) weredesigned in ２００２ . Every plot area is ５０００ m２ with ３ replicates . Stip a bungeana and A rtemisia cap illaries are the two dominantspecies in the grassland . The roots and rhizosphere soil from S . bungeana and A . cap illaries with ２０ replicates were randomlycollected in every plot for determining AM colonization rates and spore densities in ２００６ . Data were analysed using One‐wayANOVA with SPSS ( v１３ .０) .Results Our results showed that there were no significant difference ( P ＞ ０ .０５) in AM colonization rates of S bungeana and Acap illaries for four grazing intensities ( Figure １) . AM colonization rates in the roots of S bungeana are higher in ５ .３ and ８ .０sheep hm２ treatments than CK . However , the rates of AM colonization of A . cap illaries decreased while the grazing intensityincreased . AMF spore densities in rhizosphere soil of S . bungeana and A . cap illaries under four grazing intensitiessignificantly decreased ( P ＜ ０ .０５ ) as grazing intensity increased ( Figure ２) .　 Figure 1 AMF spore density in the rhizosphere soilo f S . bungeana and A . cap illaries under f ourgraz ing .　 　 Figure 2 AMF coloniz ation rate in roots o f S . bungeanaand A . cap illaries under f our graz ing .Note : The black bar shows the results of S . bungeana and the white bar shows the results of A . cap illaries in Figure １ andFigure ２ .Discussion Our results showed that herbivores can regulate AMF colonization rates in various plants with different strategies .Aboveground consumers may reduce photosynthate translocated to the root system and available to mycorrhizal fungi , resultingin a reduction in AMF spore density in rhizosphere soil . In general , the grazing can result in a negative relationship with AMFsporeproduction .Acknowledgement This study was funded by National Basic Research Program of China ( ２００７CB１０６８０４ ) and Natural Scienceand Technology Program of Lanzhou University (５８２４０２ , ５８２４０３) .~7 0 Q) 6 +' ~ 5 C: -~ 4 +' ro -~ 3 C: ~ 2 0 (.) ~ <( 0 0 2.7 5.3 8 Grazing intensity(sheep/hm 2 ) Cl 9 ----~ 8 g_ 7 (/) ~6 -;;; 5 ~ 4 ~ 3 I... 0 2 Q. (/) 1 LL ~ 0 <( a a 0 2.7 Grazing intensity(sheep/hm 2 ) 

Effects of Grazing on AM Colonization and Spore Density in Arid Grasslands of Loess Plateau

https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=2481&amp;context=igc

Effects of Grazing on AM Colonization and Spore Density in Arid Grasslands of Loess Plateau

Abstract

Similar works

Full text

Available Versions

University of Kentucky