Li, X. L.

Lin, J. B.

Liu, Y.

Tian, H.

Zhang, Heshan

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Effects of Grazing and Mowing on Vegetation Characteristic in Leymus chinensis Grassland Heshan Zhang Hubei Academy of Agricultural Science, China J. B. Lin Tianjin North Landscape Ecology Science and Technology Research Institute, China X. L. Li Chinese Academy of Agricultural Science, China Y. Liu Hubei Academy of Agricultural Science, China H. Tian Hubei Academy of Agricultural Science, China 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/21/1-4/1 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. 瞯 ]150　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　Grasslands/Rangelands Resources and Ecology ——— Ecology of Grasslands/RangelandsEffects of grazing and mowing on vegetation characteristic in Leymus chinensis grasslandHe‐shan ZHA NG１ , J .B . L IN２ ,X .L . L I３ ,Y . L IU１ , H . T IA N１１ Institute o f A nimal Science , H ubei A cademy o f A gricultural Science , W uhan 430209 , China‐E‐mail : sdz hanghs ＠ １６３ .com , ２ Tianj in North L andscape Ecology Science and Technology Research Institute , T ianj in 300250 , China , ３ Institute o fA nimal Science , Chinese A cademy o f A gricultural Science , Bei j ing 100094 , ChinaKey words : Leymus chinensis , vegetation characteristic , grazing , mowingIntroduction Grazing and mowing are primary methods for utilization of grasslands , but they also greatly influence grasslandecosystem and population characteristics . Grazing and mowing can affect plant‐species composition , species richness andproductivity ( Connell , １９７８ ; Belsky , １９８６) .Materials and methods The site was located at the south of the Xilingol‐steppe grassland , where grazing and mowing are theprincipal means of land utilization . Mean annual rainfall was ２９７ mm and the soil type was chestnut . The site was dominated byperennial native grasses (８０％ ) such as Leymus chinensis , Poa annua and Stipa grandis . Total species quantity ( S : species/m２ ) , coverage ( C) , dominance (D) and density (D摧 : tillers of grasses , plants of other species/m２ ) were measured in August２００５ ; Community diversity was estimated by species richness ( Margale index ) , diversity ( Shannon‐Wiener index ) andevenness ( Pielou index) .Results Mowing was more effective than grazing at increasing perennial herbage coverage and dominance , but mowing decreasedtotal species quantity and density . All annual herbage indices were higher for grazing than for mowing ( Table １ ) . This wasmainly due to an increased number of tillers with grazing . Species richness , diversity and evenness were higher after grazingthan with mowing ( Figure １ ) . Grazing also increased species diversity but reduced dominance of Leymus chinensis .Table 1 Species characteristic under di f f erent utiliz ed w ays .lifeformmowing grazingS C D摧 D S C D摧 DPH ２４ 靠９４ 煙.７ ８９２ 蝌９４ 换.８ ２７ k８８ K.７ １６４９ 档９３ 　.７AH １ è０ 垐.７ ０ 枛.２ ０ 崓.５８ ３ T７  .７６ ６ B.９ ３ s.９３Note : PH : perennial herbage ; AH : annual herbageFigure 1 Diversity o f community under di f f erent utiliz ed w ays .Conclusions Effects of different utilization methods of grassland vegetation were described . Mowing led to increased coverageand dominance of perennial herbage compared to grazing , but grazing increased species quantity and diversity .Grazing increasedspecies richness , diversity and evenness when compared to mowing . Grazing also increased the diversity of plant species , andreduced the dominance of Leymus chinensis , which lowered overall palatibility of these pastures for livestock .ReferencesConnell , J . H . , (１９７８) . Diversity in tropical rain forest and coral reefs . Science １９９(２４) :１３０２‐１３１０ .Belsky , A . J , (１９８６) . Does herbivory benefit plants ? A review of the evidence . Am . Nat . １２７(６) :８７０‐８９２ .□ Mowing ■ Grazing 2.5 "' 2 "' "Cl.s 1.5 '-0 "' " " > 0.5 0 Margale index Shannon- Pielou index Wiener index 

Effects of Grazing and Mowing on Vegetation Characteristic in \u3cem\u3eLeymus chinensis\u3c/em\u3e Grassland

https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=2329&amp;context=igc

Effects of Grazing and Mowing on Vegetation Characteristic in \u3cem\u3eLeymus chinensis\u3c/em\u3e Grassland

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