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Responseofrunoffandsedimentyieldandnitrogenandphosphoruslosstosoiland
waterconservationmeasuresinorchardsofredsoilslope
WUBingchen 1,2,3 ,CHENXiaoan 1,2,3 ,TANGChongjun 1,2,3 ,
4
1,2,3
HUYishui,CAIYuanhai ,XUXiaohan 1,2,3
(1.JiangxiAcademyofWaterScienceandEngineering,Nanchang 330029,China;
2.JiangxiProvincialTechnologyInnovationCenterforEcologicalWaterEngineeringinPoyangLakeBasin,Nanchang 330029,China;
3.JiangxiProvincialKeyLaboratoryofSoilErosionandPrevention,Nanchang 330029,China;
4.ChinaMunicipalEngineeringSouthwestDesignandResearchInstituteCo.,Ltd.,Chengdu 610081,China)
Abstract:Thedeclineoflandproductivityandwaterpollutioncausedbytheprocessofrainfall,runoff,erosion
andnutrientoutputinorchardslopeisoneofthekeyproblemsrestrictingtheeconomicdevelopmentandecological
securityinhillyareasofredsoil.Toclarifythequantitativeeffectsofrainfallconditionsandsoilandwaterconser
vationmeasuresonthecharacteristicsofsedimentyieldandnitrogenandphosphorusloss,thisstudyanalyzedthe
quantitativeeffectsofprecipitationandrainfallintensityofdifferentsoilandwaterconservationmeasuresonsedi
mentcontentandrunoffcoefficient ,andthenanalyzedthequantitativerelationshipbetweensedimentyieldandni
trogenandphosphoruslossconcentrationbasedontheobservationdataoforchardsrunoffplotsfrom2020to2022in
De ’anCounty,JiangxiProvince.Theresultsshowthat:(1)underdifferentsoilandwaterconservationmeasures,
therearedifferencesinthevariationtrendsofsedimentcontentandrunoffcoefficientwithprecipitationandrainfall
intensity.Comparedwithclearingcultivationcontrol(CK),theaveragesedimentcontentofbeltplanting(S1),
wholeplanting(S2),horizontalterrace(S3)andhorizontalterracewithladderwallplanting(S4)decreasedby
17.8%,42.3%,22.6% and47.9%,respectively,andtheaveragerunoffcoefficientdecreasedby60%,71.8%,
26.4% and56.4%,respectively.Comparedwithengineeringmeasures,vegetationmeasurescouldcontrolrunoff
better ,whileengineeringmeasurescouldinterceptsedimentbetter.(2)UndertheconditionsofS1,S2,S3,S4
andCK,STN?TNwere48.2%,45.6%,44.2%,45.9and45.7%,andSTP?TPwere52.9%,50.0%,47.2%,
45.2% and47.4%,respectively,indicatingthatcomparedwiththecontrolconditionsofdifferentmeasures,the
losspatternsofnitrogenandphosphorusdidnotchangesignificantly.3 )ComparedwithCK,theaverageconcentra
tionchangesoftotalnitrogen (TN)inS1,S2,S3andS4were- 8.2%,- 13.4%,15.0% and- 12.1%,andthe
averageconcentrationchangesofsolubletotalnitrogen(STN)were- 3.2%,- 13.6%,11.4% and- 11.7%,re
spectively.Theaverageconcentrationoftotalphosphorus(TP)changedby- 10.5%,- 21.0%,39.5%,10.5%,
andtheaverageconcentrationofsolubletotalphosphorus(STP)changedby0,- 16.7%,38.9%,5.5%,respec
tively.Comparedwithengineeringmeasures,vegetationmeasuresplayedamorecriticalroleincontrollingnitrogen
andphosphoruslossconcentration.Thisstudyisofgreatsignificancefortherationalarrangementofsoilandwater
conservationmeasuresontheslopeoforchardsinhillyareasofredsoil.
Keywords:precipitation;runoffandsedimentyield; soiland waterconservation; nitrogen and phosphorus
loss;orchard
(责任编辑:耿庆斋)
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