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巢湖流域农田土壤磷吸持指数及吸持饱和度特征周慧平
2007, 26 ():386-389
JournalofAgro-EnvironmentScience
1, 5 2 2 3 4
周慧平 , 高 超 , 王登峰 , 赵和苍 , 张桃林
(1., 21009 3;2., 210093;3.
, 230022;4., 210000; 5., 2004 34 )
:。 ,
(PSI)(DPSS)。 ,
, , 。
, ,
;, 。 30% 25%,
。
:;;;
:S15 3.3 :A :1672-2043 (2007)-0386-04
P osporusSorptionandSaturationinTopsoilofC aouLakeW atersed
1, 5 2 2 3 4
ZHOUHui-Ping, GAOC ao, WANGDeng- feng, ZHAOHe- cang, ZHANGTao- lin
(1.InternationalInstituteforEartSystem Science, NanjingUniversity, Nanjing2 10093, C ina;2.DepartmentofGeograpy
andOceanograpyScienc,e NanjingUniversity, Nanjing2 10093, C ina;3. InstituteofGeologicalSurveyofAnuiProvinc,e
Hefei2 30022, C ina;4. InstituteofSoilScienc,eC ineseAcademyofScienc,eNanjing210000, C ina;5.TaiuBasinAu-
torityofteMinistryofWaterResource,s Sangai2004 34, C ina)
Abstrac:tT emipactofagriculturalactivitiesonposporus(P)waterpollutioncontinuestobeaseriouspublicconcern.Be-
causeofte ig Pfixationcapacityofsoil,s verticalmovementofPtroug tesoilprofileisgenerallyconsideredoflittlemi-
portanc,e unlesssoilsbecomePsaturated.T ePsorptionindex(PSI)andtedegreeofPsorptionsaturation(DPSS) avebeen
suggestedasindicatorsforteriskofP lossfrom agriculturalsoil.s Intispape,r tePsorptionandsaturationintopsoilof
C aouLakewatersedweretestedandteresultssowedtattePfixationcapacityinCaouareawasgenerallylowertan
Taiuandareasinoterliterature.sT eredsoilandcalcareoussoilada igerPfixationcapacityw iletepurplesoilad
telowestcapacity.AnegativecorrelationwasfoundbetweenPSIandDPSSforallsoil.sT ePsaturationinredsoilandca-l
careoussoilwererelativelowertanpurplesoi.lOver30% oftesamplingsoilswerePsaturatedwit teDPSSoverpass
25%, w ic istetresoldofPlossfrom agriculturalsoils. Itindicatedtatmoreattentionssouldbepaidtotisareaforte
waterpollutionderivedfromPloss.
Keyword:sposporu;s sorptionindex; sorptionsaturation; Caouwatersed
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