Page 198 - 《水资源与水工程学报》2024年第6期
P. 198

!35 "!6 #                         & ' ( ) & * + , -                               Vol.35No.6
               2024 $ 12 %              JournalofWaterResources&WaterEngineering                 Dec.,2024

            DOI:10.11705/j.issn.1672-643X.2024.06.20


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                 HIJKL:S661.1;S152.7   MNOPQ:A    MRSL:1672643X(2024)06019413
                        Yieldandsoilmoistureresponseofrainfedappleorchardsto

                                  precipitationindifferenthydrologicalyears

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                                 LEIYuhan ,KONGWei ,LUANXiaobo ,GAOFei
                    (1.KeyLaboratoryofAgriculturalSoilandWaterEngineeringinAridandSemiaridAreas,MinistryofEducation,
                             NorthwestA&FUniversity,Yangling712100,China;2.CollegeofWaterResourcesand
                                ArchitecturalEngineering ,NorthwestA&FUniversity,Yangling712100,China)
                 Abstract:Inordertoexplorethemutualfeedbackmechanismofyieldandwaterindryorchardsinnorth
                 ernShaanxiProvince,appleorchardsinfourcountiesofBaota,Luochuan,Suide,andZizhouareselect
                 edforthecasestudy.Thedynamicsoforchardyieldandsoilmoistureweresimulatedandanalyzedbased
                 ontheWinEPICmodelunderdifferentprecipitationlevelsfrom1980to2018.Meanwhile ,theimpactof
                 watersupplyontheyieldofappletreesofdifferentages ,soilmoistureandwaterstresswereinvestigated
                 toanalyzetheappropriatewatersupplyquotasandplantingyearsforappletreesunderdifferentprecipita
                 tionlevelsinnorthernShannxi.Theresultsshowedthattheaverageannualorchardyieldunderhistorical
                 precipitationwasconsistentlyhigherthanthatunderconsecutivenormalprecipitationandmoderatelydry
                 precipitation.Thefluctuationsofwaterproductivityweregreaterinthemoderatelydryprecipitationyears
                 thanthatinthenormalprecipitationyears ,indicatingthatcontinuouswatershortageexacerbatedthein
                 terannualinstabilityofwateruseefficiencyintheorchard.Theorchardsaged4to25yearsinSuideand
                 Zizhouperformedbetterintermsofyieldstability ,highyield,andsustainabilityunderconsecutivenor
                 malprecipitationandmoderatelydryprecipitation.Thedeepsoilmoisturedecreasedwiththeageofthe
                 treesandtendedtograduallydecreasetowiltingpoint ,especiallyunderconsecutivemoderatelydrypre
                 cipitation.Thewaterstresscausedbyconsecutivenormalprecipitationormoderatelydryprecipitationwas

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