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Study For The The Soil Properties Of Different Landscape Types On The Edge Of Ebinur Lake

Posted on:2017-01-25Degree:MasterType:Thesis
Country:ChinaCandidate:S XuFull Text:PDF
GTID:2283330509451870Subject:Physical geography
Abstract/Summary:PDF Full Text Request
Arid and semi-arid wetlands in the northwest regions accounted for a large proportion in our country.It plays an irreplaceable role in regulating climate,water conservation,carbon and nitrogen cycles and biodiversity conservation,etc.To depth study the wetland status will be more useful to ecological protection and environmental management in this region.Wetland soil formation in particular hydrology and vegetation conditions,It has an unique development process and special functional properties,and it plays an important role in the maintenance of wetland ecosystem balance and succession.Salinization is not only one of the main types of land degradation in arid,But also the resources and ecological problems,and poses a serious threat to a stable environment.Soil fertility have an important impact on the sustainable agricultural development in the region,which performed the most obvious reflection in arid semiarid region.Therefore,the proper evaluation of the soil to prevent soil salinization and wetland promote stem Agriculture Sustainable Development are practical significance.In this study, we choose the edge of the Ebinur Lake,To proven the spatial distribution of soil properties,and provide a scientific basis for salinity control and ecological environment improvement area soil.Regard the aid of Ebinur Lake as a study area,laid 40 representative sampling points along the Ebinur Lake,and collected160 samples.Quantitative determination of 0-40 cm soil characteristics,Using field sampling surveys combined with laboratory analysis,We discussed the soil characteristics on the eage of Ebinur Lake.Using the GIS tools,Geostatistical data analysis and descriptive statistics.The result shows that:(1) Soil Ph highest soil salinization of arable land in the Ph value of the minimum arable minimum, soil moisture content in the surface layer of the forest are0-5cm soil.(2) Cultivated land, forest land, bare land, salinization of soil moisture content of land in 0-40 cm soil layer changes greatly, farmland soil moisture variation is strongest, bare soil variation degree is the weakest.(3) Different types of soil in the landscape,change characteristics available phosphorus content is:the horizontal direction,arable land available phosphorus content of the highest,lowest land salinization content;vertically:salinization of landshowed decreases from the surface down,cultivated soil available phosphorus content in the surface the lowest available phosphorus content in soil was not obvious difference grassland,bare soil,the highest available phosphorus content of the surface layer,forest soil,the highest 5-20 cm soil available phosphorus content.(4)The presence of soil salt content five landscape background differences,different types of landscape layers of soil salinity uneven distribution of surface soil salt content as well as the content of salt ions is greater than in the subsoil,soil salt accumulation obvious characteristics,salinization,alkalized serious.Each salt ions mainly gathered in 0-5cm soil. Woodland landscape of HCO3-, Cl-,K++Na+ content,bare landscape of SO42- content, salinization of land Cl-,CO32-, SO42-,K ++Na+content increased with soil increase the depth decreases,grassland landscape,5-10 cm soil surface of each ion salt content of less than 10-20 cm.
Keywords/Search Tags:Soil properties, Spatial distribution, Edge of Ebinur Lake
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