Gao, Ting

Li, Fengxia

Zhang, Xiaogang

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Study on the Relationship between Edaphon Amount and Soil Type in Desert Grassland Ting Gao Ningxia Academy of Agriculture and Forestry Science, China Fengxia Li Ningxia Academy of Agriculture and Forestry Science, China Xiaogang Zhang Ningxia Academy of Agriculture and Forestry 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/21/2-3/14 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 ]409　 瞯Grasslands/Rangelands Resources and Ecology ——— Soil Quality and Plant NutritionStudy on the relationship between edaphon amount and soil type in desert grasslandTing Gao , Fengx ia L i and Zhang X iaogangResource and Env ironment Institute N ingx ia A cademy o f A griculture and Forestry Science and N ingx ia Y ike A griculturalScience and Technology Company L imited . E‐mail : gaoting3cn＠ yahoo .com .cnKey words : desert , soil microbial , vegetation type , soil typeIntroduction Soil microbial is key regulators pf energy and nutrient flux in ecosystems . Here we examined the type and quantityof soil microorganisms in different soils in Ningxia desert grassland vegetation type . Such information is of basic scientificinterest and may be useful in grassland restoration .Materials and methods Vegetation measurements were made in the desert grassland in Yanchi County . Measurements includedplant height , cover , frequency and biomass . Bacteria were examined using a beef extract peptone agar count ; actinomycosiswas examined using a Gao medium count , fungi were examined using a Martin＇s Bangladesh‐count agar medium .Results and discussion Bacteria counts differed depending on soil and vegetation types . Light loam soils had the largest numberof bacteria averaging ４５ .２７ × １０６ / g dry soil . Light sand had the smallest number of bacteria averaging ８ .９ × １０６ / g dry soil ;average number of bacteria on loam and sandy loam soils were ２７ .９ × １０６ / g dry soil and １８ .６３ × １０６ / g dry soil , respectively .Different types of vegetation and soil types of actinomyces caused a significant number of changes , and actinomycosis number inthe tight sand ＞ the number of actinomyces in sandy loam ＞ the number of actinomyces in light loam ＞ the number ofactinomycosis in loam soil . Different types of vegetation and soil types of fungi caused a significant number of changes . Thenumber of fungal in loam was the average maximum about １１ .７３ × １０３ / g dry soil ; the average number of the largest fungi intight sand was small about ３ .０３ × １０３ / g dry soil ; followed by light loam and sandy loam soil fungi number in the volume were８ .２ × １０３ / g dry soil and ３ .９７ × １０３ / g dry soil . Adverse ecological environment and the different tex ture had different soilfertility ; the different types of vegetation affected its advantages value and the distribution of microbial number correspondingdifferences . Due to the drought , soil potential fertility and effective nutrient was poor , the soil microbial volume was not high .At the same time the light loam and loam were better physical properties , so microbial content was relatively high . Soilmicrobial bacteria was exceeding other microorganisms ( normally １０７‐１０６ ／ g dry soil) , actinomycosis( １０５‐１０４ ／ g dry soil) andfungi (１０３ ／ g dry soil) . But fungi had greater shape individual , according to the volume and the proportion of cells , bacteriaand fungi biological effects were the same . Because soil microbial was majority of the heterotrophic bacteria , and theirdistribution and soil organic matter content is significantly correlated , and physical and chemical properties of soil fertilitystatus on the distribution of microbes have a direct impact , these factors would lead to change in the number of micro‐organismsin the soil and composition of the grow th and decline change .Table 1 Di f f erent soil ty pes and vegetation ty pes o f microorganisms quantity ( / g dry soil) .soil types Bacteria( × １０６ ) Fungi / ( × １０３ ) Actinomycosis( × １０４ )Tight [ ０ ] sand ８ `.９ ３  .０３ ４２ 0.５７loam ２７ t.９ １１ +.７３ １０ 0.５７Sandy loam １８ `.６３ ３  .９７ ２６ 0.１３Light loam ４５ `.２７ ８ +.２ １８ 0.９７ReferenceXu ,G . H . １９８４ . Glorious north slope of Changbai Mountain Nature Reserve forest soil microbial ecology distribution andbiochemical properties . Ecological Journals , ４ : ２０７‐２２３ .

Study on the Relationship between Edaphon Amount and Soil Type in Desert Grassland

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Study on the Relationship between Edaphon Amount and Soil Type in Desert Grassland

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