Wang, Xu

Xin, Xiaoping

Yang, Guixia

Zhou, Yaozhi

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress The Influences of Land Use Patterns on Wind Erosion of Meadow Grasslands Yaozhi Zhou Ministry of Agriculture, China Xiaoping Xin Ministry of Agriculture, China Guixia Yang Ministry of Agriculture, China Xu Wang Ministry of Agriculture, 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/21/4-1/41 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 ]599　 瞯Grasslands/Rangelands Resources and Ecology ——— Indicators for Sustainable Use and Conservation of Grasslands/Rangelands ResourcesThe influences of land use patterns on wind erosion of meadow grasslandsZHOU Yao‐z hi1 ,2 , X IN X iao‐p ing1 ,2 , YA NG Gui‐x ia1 ,2 , WA NG‐Xu1 ,21 K ey L aboratory o f Resource Remote Sensing and Digital A griculture , M inistry o f A griculture , Bei j ing 100081 ,China ;2 H ulunbeier State S tation o f G rassland Ecosystem Field Observation and Scienti f ic Research , H ailaer , 021012 , China , E‐mail :z yz hn666＠ 126 .comKey words :meadow grassland , soil wind erosion , land use patterns , wind tunnel experimentIntroduction More than half of the world摧s pasturelands are overgrazed and subject to erosive degradation ( Pimentel et al .１９９５ ) . Climate change and human economic activities in arid areas have increased the deleterious impacts of wind erosion ( Shi PJ et al .２００４ ) . This study examined the effects of land‐use patterns on the ability meadow grasslands to resist wind erosion .Materials and methods The research site was located in Xieertala in Hulunbeier , which is located in the transition area betweenthe west Daxinanling and the Mongolian Plateau . The grazing intensity in these pastures was related to the vegetation coverwhich was , in turn , related to the distance from the inhabited area . The vegetation cover of pasture at the following distancesfrom the inhabited area :１５０m , １０００m , ２５００m was ２０％ ,４０％ and ６０％ , respectively with corresponding grazing intensitiesconsidered as mild , moderate and severe . Croplands were also present within the meadow grassland at a distance of １３００m ,where summer wheat was grown that was then tilled after harvest . In a representative point within each sample plot , weexcavated a soil sample of a length , width and height of ９５cm ,３０cm ,２０cm in October ２００６ . A vegetation survey was conductedaround each sample point of the meadow grassland , in August ２００６ . The survey items included the vegetation cover , speciescomposition and the aboveground biomass of various plant species .Results As grazing intensity increased , the change of plant species and reduction of vegetation cover increased the potential forwind erosion of the soil . When the meadow grassland was mildly grazed , the vegetation cover maintained about ６０％ , whichreduced the amount of soil erosion even at wind speeds of ２５ m/ s . When the vegetation cover of meadow grassland was reducedto less than ３５％ , soil erosion rapidly increased at lower wind speeds .Table 1 E f f ects o f land using on the vegetation .Land using Patternsg /m２ Ftotal of plantspecies plant speciesinper square covermeter overground％ litter biomassg /m２ 屯mild grazing ４９ 煙２３ y.８ ± ４ .７ ６３ ± ５ 哌.７ １８８ \.５５ ± ５７ .９９ ９１ `.４７ ± ３１ .６２moderate grazing ４８ 煙１８ y.４ ± ２ .８ ４２ ± ６ 哌.４ ９９ ..２０ ± １１ .６４ ６４ `.６３ ± １７ .３１severe grazing ３５ 煙１８ ± ３  .５ ２２ ± ５ 哌.６ ４６ ..７５ ± １４ .８ ２３ `.６１ ± ８ .４No‐tillage cropland ０ q０ K０ &０ ０ 2Table 2 Dominance o f main p lant species under di f f erent land using patterns .mild grazing moderate grazing severe grazingspecies dominance species dominance species dominanceS .baicalensis ０ M.２１８６８ A .chinense ０ &.４００８ C .korshinskyi ０ �.３５９９A .chinense ０ M.１８２９８ C .korshinskyi ０ &.１７９５ C .squarrosa ０ �.２２５３C . pediformis ０ M.１１２０３ C .squarrosa ０ &.１０９３ P .turczaninovii ０ �.０２２０P .chinensis ０ M.０７２０８ A .laciniata ０ &.０４１１ A .chinense ０ �.０２１２Table 3 Relationship between land use and the rate o f w ind erosion under di f f erent w ind speed . g . (m２ .min) ‐１Wind speed m 爛 s‐１ mild grazing Moderate grazing Severe grazing No‐tillage cropland１５  ０ 哌０ 葺２ 苘.０３ ２ 谮.９４２０  ０ 哌０ 葺.８８ ３ 苘.１６ ７ 谮.２１２５  ０ 哌.０５ １ 葺.５６ ９ 苘.７２ ６８ .１２Conclusions When the Hulunbeier meadow grassland is mildly grazed with vegetation cover maintained about ６０％ , thedominant species of the community are Stipa baicalensis and A .chinensis , and the vegetation system can maintain it摧s integrityagainst wind erosion . The mild grazing is , therefore , a sustainable land utilization mode . Correspondingly , the other landutilization modes in the experiment can cause serious wind erosion , especially in the no‐tillage cropland within the meadowgrassland . As the no‐tillage cropland has reduced vegetation the soil wind erosion rates achieve ６８２ .１kg / hm２ when the windspeed is ２５ m/ s , which approaches the average formation quantity of soil (１０００kg / hm２ ) in a year .

The Influences of Land Use Patterns on Wind Erosion of Meadow Grasslands

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The Influences of Land Use Patterns on Wind Erosion of Meadow Grasslands

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