Gan, L.

Horn, R.

Krümmelbein, J.

Peng, X.

Peth, S.

Reszkowska, A.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Effect of Grazing on Soil Structure and Consequences for Soil Mechanical and Hydraulic Propertiesin Inner Mongolia A. Reszkowska Christian‐Albrechts‐University, Germany J. Krümmelbein Brandenburg University of Technology Cottbus, Germany S. Peth Christian‐Albrechts‐University, Germany L. Gan Hunan Normal University, China X. Peng Chinese Academy of Sciences, 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/21/2-2/35 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 A. Reszkowska, J. Krümmelbein, S. Peth, L. Gan, X. Peng, and R. Horn This event is available at UKnowledge: https://uknowledge.uky.edu/igc/21/2-2/35 瞯 ]380　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　Grasslands/Rangelands Resources and Ecology ——— Soil Quality and Plant NutritionEffect of grazing on soil structure and consequences for soil mechanical and hydraulic propertiesin Inner MongoliaA .Resz kowska１ , J .K rümmelbein２ , S .Peth１ ,L . Gan３ ,X h .Peng４ and R . Horn１１ Institute o f Plant Nutrition and Soil Science , Faculty o f A griculture and Nutritional Science , Christian‐A lbrechts‐University , Hermann‐Rodewald‐Str . ２ , ２４１１８ K iel , Germany , E‐mail :a . resz kowska ＠ sools .uni‐kiel‐de , ２ BrandenburgUniversity o f Technology Cottbus , Faculty o f Env ironmental Sciences and Process Enginering , Konrad‐Wachsmann‐A llee ６ ,０３０４６ Cottbus , Germany ３ College o f Resources and Env ironment , H unan Normal University , ４１００８１ Changsha , H unan ,China , ４ Institute o f Soil Science , Chinese A cademy o f Sciences , East Bei j ing Road ７１ ,２１０００８ Nanj ing , ChinaKey words : grazing intensity , soil structure , hydraulic and mechanical propertiesIntroduction Animal trampling can strongly affect soil physical properties . Destruction of soil structure caused by animals leadsto increase in soil bulk density followed by an increase in surface runoff . Grazing can cause changes in pore functions whichaffect the hydraulic properties of the soil . Stresses exerted by trampling can also lead to changes in soil mechanical strength .The soil physical properties can be affected much more when considering arid climate conditions . The objective of this studywas to investigate how the animal trampling can affect soil physical ( hydraulic and mechanical) properties in an Inner Mongoliagrassland ecosystem with different grazing intensity , with different moisture conditions .Materials and methods The effect of trampling by sheep and goats on physical ( hydraulic and mechanical ) properties ofgrassland soils on the steppe in Inner Mongolia , was investigated . The samples were collected from two different steppeecosystems ( Leymus chinensis step pe and Stip a grandis step pe ) . The samples were taken from sites with different grazingintensities : ungrazed since １９７９ ( UG７９ ) , ungrazed since １９９９ ( UG９９ ) , w inter grazed ( WG ) and overgrazed ( OG ) at theLeymus chinensis site and ungrazed since １９７９ ( SG UG７９ ) and continuously grazed ( SG CG) at the Stip a grandis site . Thestudied soils were derived from aeolian sediments above acid volcanic rocks . From each site soil samples , for measurements ofsoil hydraulic and mechanical properties , were taken .Results The soil hydraulic functions and soil mechanical properties were affected by grazing . It was found especially for the topsoil . The animal trampling caused a decrease in soil total porosity and an increase in soil bulk density . The saturated hydraulicconductivity was lower for the grazed sites compared to ungrazed sites . Grazing caused a reorganization of soil particles whichresulted in decreased soil air permeability . Furthermore , animal trampling affected soil sensitivity and intensity of shrinkage .Grazing also affected soil mechanical properties by changing the precompression stress values which were higher for the grazedsites compared to ungrazed .Conclusions The results show that grazing can strongly affect soil physical ( hydraulic and mechanical ) properties . Animaltrampling causes soil structure deterioration , especially in the top layer of the soil . Changes in soil structure due to grazingaffect soil functions as well as plant productivity .ReferencesChen J . , Huang D . , Shiyomi M . , Hori Y . , Yamamura Y . , Yiruhan . ( ２００７ ) . Spatial heterogeneity and diversity ofvegetation at the landscape level in Inner Mongolia , China , with special reference to water resources . Landscape and UrbanPlanning . ８２ , ２２２‐２３２ .Dan S . , Mengli Z . , Bing H . and Guodong H . (２００６) . Examining the genetic diversity of Stipa grandis under various grazingpressures . A cta Ecologica Sinica . ２６ (１０ ) , ３１７５‐３１８３ .Fukuo A . , Saito G . , Akiyama T . and Chen Z . ( ２００１ ) . Influence of human activities and livestock of Inner Mongoliagrassland . Proceedings o f the ２２nd A sian Con f erence on Remote Sensing . ７８８‐７９１ .Hoffmann C . , Funk R . , Wieland R . , Li Y . and Sommer M . ( ２００８ ) . Effects of grazing and topography on dust flux anddeposition in the Xilingele grassland , Inner Mongolia . Journal o f A rid Env ironment . In press .Horn R . ( １９８６ ) . The influence of animal treading on soil physical properties of mountainous soils . Mitteilgn . Dtsch .Bodekundl . Gesellsch . , ４６ , ６４‐６９ .

Effect of Grazing on Soil Structure and Consequences for Soil Mechanical and Hydraulic Propertiesin Inner Mongolia

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Effect of Grazing on Soil Structure and Consequences for Soil Mechanical and Hydraulic Propertiesin Inner Mongolia

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