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Spatial Heterogeneity of Soil Organic Matter and Soil Moisture of Topsoil at Desertification Combating Areas of Sandy Lands in East of Yellow River in Ningxia

宁夏河东沙区防沙治沙区表层土壤有机质和土壤水分空间异质性



全 文 :!23" !6#
 Vol.23  No.6
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ACTA AGRESTIA SINICA
   2015$  11%
  Nov.  2015
犱狅犻:10.11733/j.issn.10070435.2015.06.007
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ZhanXiuli1,YangChenyang1,HanLei2
(1.SchoolofRecoursesandEnvironment,NingxiaUniversity,Yinchuan,Ningxia750021,China;
2.DevelopmentCenterofNewTechniqueApplicationandResearch,NingxiaUniversity,Yinchuan,Ningxia750021,China)
犃犫狊狋狉犪犮狋:Basedonfieldsampling,laboratoryexperimentandgeostatisticsanalysis,westudiedonthespa
tialdistributiondynamicsofsoilorganicmatterandsoilmoistureofthetopsoilatdesertificationcombating
areasinNingxia.Datashowedthatthesoilorganicmatterfittednormaldistribution,thecontentofsoil
organicmatterwaslow,andtheaveragevalueofsoilorganicmatterwas1.34g·kg-1.WiththeKriging
analysis,resultsshowedthatthecontentofsoilorganicmatterdecreasedfromthenorthtothesouthin
thisstudyareaandthedistributionofsoilorganicmatterwaszonalwithgreatspatialheterogeneity.The
contentofsoilorganicmatterinthenorthwestofthestudyareawaslowest,among0.8~1.05g·kg-1,
andthecontentofsoilorganicmatterinthesouthofthestudyareawashigh,among2.20~2.36g·kg-1,
butthedistributionwaslow.Thesoilwatercontent(SWC)fittednormaldistribution,andwasverylow,
average0.75%.WiththeKriginganalysis,resultsshowedthatSWCofthetopsoilinthestudyareahad
spatialheterogeneity,anddecreasedfromthenorthtothesouth.Thesoilorganicmatterandthesoil
moisturealhadhigherspatialautocorrelation.Thespatialcorrelationrangeofthesoilorganicmatterwas
relativelylarge,36.69m.Thespatialcorrelationrangeofthesoilmoisturewassmal,8.48m.
犓犲狔狑狅狉犱狊:Soilorganicmatter;Soilmoisture;Spatialheterogeneity;Geostatisticsanalysis;Desertifica
tioncombatingarea
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Tabel1 Statisticanalysisofsoilorganicmatterandsoilmoistureoftopsoil
Ä:Index
}§×
Samplenumber
x¹1
Distributionpattern
ߝI
Min
ß(I
Max
¸I
Mean
:;a
SD
kêI×
犆犞/%
Ùzò
Soilorganic
matter/g·kg-1
100 vH 0.5 3.48 1.34 0.54 40.30
AÍpŒº
Soilwater
content/%
100 vH 0.44 1.52 0.75 0.17 22.66
  sÈ1su,Ùzòk]¨õ¾0.5~3.48
g·kg-1,ã¸I¾1.34g·kg-1,˜É§DE–l
AÍ=Ùzpº:qds

:;a¾ 0.54
g·kg-1,Ùzòlpº”1.34±0.54g·kg-1。
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Tabel2Variogrammodelsandparametersforsoilorganicmatterandsoilmoisture

Variable
@¢O
Theoreticalmodel
©[I
(C0)
Nugget
Z"I
(C0+C)Sil
kU
Range/m
©[I

Z"I
Nuggetsilratios/%
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ža

RSS
Ùzò
Soilorganic
matter
Ä×O
Exponential
model
0.0792 0.3404 36.69 23.27 0.992 2.204E04
AÍpŒº
Soilwater
content
ì~O
Sphericalmodel
0.00032 0.0286 8.48 1.12 0.293 2.311E05
W1  #gçÂk?{ #k“?X»oeIW
Fig.1 Semivariogramsforsoilorganicmatterandsoilmoisture
Ô
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Note:a:Samplesemivariogramsforsoilorganicmatter;b:Samplesemivariogramsforsoilmoisture
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Fig.2 Spatialvariationofsoilorganicmatterandsoilmoisture
Ô
:a:AÍÙzòpº}ùkêû,b:AÍpŒº}ùkêû
Note:a:Spatialvariationofsoilorganicmatter;b:Spatialvariationofsoilmoisture
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