An, Shazhou

Jin, Falan

Sun, Zongjiu

Tao, Meng

Zhang, Xianhua

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Change of Regrowth of Seripidium transiliensis Poljak in Different Grazing Disturbance Shazhou An Xinjiang Agricultural University, China Zongjiu Sun Xinjiang Agricultural University, China Meng Tao Xinjiang Agricultural University, China Falan Jin Xinjiang Agricultural University, China Xianhua Zhang Xinjiang Agricultural University, 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/21/3-2/4 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. 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　 瞯 ]487　 瞯Grasslands/Rangelands Resources and Ecology ——— Soil‐Plant‐Animal InterrelationshipsChange of regrowth of Seripidium transiliensis Poljak . in different grazing disturbanceA N Sha‐z hou , SUN Zong‐j iu , TAO Meng , JIN Fa‐lan ,ZHA NG X ian‐huaCollege o f Pratacultural Engineering , X inj iang A gricultural University , K ey L aboratory o f G rassland Resources andEcology o f X inj iang , Urumqi 830052 , China .E‐mail :x j asz＠ 126 .comKey words : Seriphidium transiliense ,disturbance of grazing ,regeneration ,dry yield ,densityIntroduction Seriphidium transiliense , super xerophyte semi‐shrub , whose distribution center in Xinjiang of China ( Lin , et al ,１９９１ ) , was widely distributed ５００ ～ １５００ m above sea level in north Xinjiang , and was constructive species of desert and desertsteppe communities . The S . transiliense desert was not only the important spring‐autumn pasture in Xinjiang , but also theserious degenerate pasture . In order to establish reasonable grazing intensities , the change of regrow th of S . transiliense werestudied .Materials and methods The study site was located low mountain of north slope of Bogeda mountain in Urumqi , Xinjiang ( E８７°４６′ ～ ８７°４７′ , N４３°４９′ ～ ４３°５３′ , ８４０ ～ １１１０ m above sea level , annual mean temperature is ６ .４ ℃ , rainfall is ２３６ mm ) .Simulated grazing treatments were initiated on １ of April to １ of June in ２００６ . Four grazing intensities were designed , namelylight grazing ( mowing with stubble height of ５ cm , LG) , moderate grazing ( mowing with stubble height of ２ cm , MG) , heavygrazing ( mowing with stubble height of ０cm , excluding lignified old stem , HG) , extreme grazing ( mowing with stubble heightof ０cm , including lignified old stem , EG ) . Each plots of simulated grazing intensities were １ m２ , replicate ５ . Dry weight ,regeneration height of S . transiliense and density of community was measured in all experiments every １５d . Analysis ofvariance ( ANOVA) was performed for differences through Duncan .Results and discussionDry weight of S . transiliense under different grazingintensity was showed in Table １ . The dry weight of S .transiliense had significant difference among four grazingintensities( p ＜ ０ .０５ ) and the order was �EG ＞ HG ＞ MG ≈LG�( Table １ ) . The dry weight on EG , HG was higher( compared with MG , respectively significant increase of８８０％ , ４７４％ ) , but it was unadvantageous to the continualutilization of S . transiliense desert .Table 1 Dry weight o f S . transiliense under di ff erentgraz ing intensities ( g /m2 ) .T reatment Date of grazing ( day /month)１ /４ 屯１５ /４ v１ /５ 哪１５ /５ n１ /６ 技LG ０ q.５７c ２ 祆.５０c １ h.６７c ８ 滗.６６c ２１ 帋.１９cMG ３ q.６３c ９ 祆.９４c １０ 枛.７８c ２０  .３７c ３２ 帋.９０cHG ６８ 煙.２３b ８３  .９３b ５４ 枛.６７b ８２ .８８b ５６ 帋.７１bEG １６５ 屯.０a １２１ H.６a １１２ 哪.４a １２９ @.２a １１４ 技.９３aRegeneration speed of S . transiliense appeared similar �para‐bola�trend with the increase of grazing intensity , and the highestwas at MG ( Figure １ ) , which indicated that moderate grazing could promote the vegetative grow th of forage ( Yang , et al ,２００５ ; Wu , et al , ２００５) . Compared with that of between １５th April and １st May , Regeneration speed of S . transiliense between１st May and １５th May on LG , MG , HG , EG respectively increased ８２％ , ２１％ ,４９％ ,２３２％ , which was possibly correlative totemperature and rainfall .Grazing intension had a little effect on the species of S . transiliense desert , and the density of subordinate grass increased withgrazing intensity . After grazing on １５th May , the density of S . transiliense on LG , HG , EG decreased ２６ .７６％ , ２２ .７５％ , ８２ .０３％ , but that increased １２ .２１％ on MG ( Figure ２) , as further indicated MG was fit to the continual development of desert .Figure 1 Di ff erent regeneration speedaf ter simulate graz ing .　 　 　 　 　 　Figure 2 Density o f S . transiliensecontrust be f ore and af ter graz ing .Conclusions Compared with dry weight , regeneration speed of S . transiliense , density and species of community among fourgrazing intensities , moderate grazing was propitious to the continual development of S . transiliense desert pasture .ReferenceLin You‐run , (１９９１ ) . Flora Reipublicae Popularis Sinicae ( vol . ７６) . Beijing : Science Press , ２６１ .10 s:a 6 35 ~ 5 Na 30 '- '-a H 25 ~ 4 "-' ,...., "O ,...., 20 "-' 3 . ..., "-' -::. 0. 15 "' 2 >, --4. 15-5. 1 --- 5. 1-5. 15 +' ..c:: . ..., 10 +' "' .. " 5 --- arter grazing " "-' 0 0 "O H 0 bJ) "-' LG MG HG EG LG MG HG EG H grazing intensity grazing intensity 

Change of Regrowth of \u3cem\u3eSeripidium transiliensis\u3c/em\u3e Poljak in Different Grazing Disturbance

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Change of Regrowth of \u3cem\u3eSeripidium transiliensis\u3c/em\u3e Poljak in Different Grazing Disturbance

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