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1、Watersavinginlowlandriceproduction:AnexperimentalandmodellingstudyPromotor:Prof.dr.ir.J.H.J.SpiertzHoogleraarGewasecologie,metbijzondereaandachtvoornutriënten-enstofstromenCo-promotor:dr.ir.B.A.M.BoumanSeniorscientist,InternationalRiceResearchInstitute,PhilippinesPromotiecommis
2、sie:Prof.dr.M.J.Kropff(WageningenUniversiteit)Prof.dr.LiYuanhua(WuhanUniversity,MinistryofWaterResources,China)Prof.dr.ir.O.Oenema(WageningenUniversiteit)Dr.ir.J.C.vanDam(WageningenUniversiteit)Ditonderzoekisuitgevoerdbinnendeonderzoekschool:ProductionEcologyandResourceConserva
3、tion.Watersavinginlowlandriceproduction:AnexperimentalandmodellingstudyPaulBelderProefschriftterverkrijgingvandegraadvandoctoropgezagvanderectormagnificusvanWageningenUniversiteit,prof.dr.ir.L.Speelmaninhetopenbaarteverdedigenopwoensdag15juni2005desnamiddagstevieruurindeAulaPau
4、lBelder(2005)Watersavinginlowlandriceproduction:Anexperimentalandmodellingstudy.Belder,P.–[S.l.:s.n.].Ill.PhDthesisWageningenUniversity.–Withref.–WithsummariesinEnglishandDutchISBN:90-8504-224-0AbstractBelder,P.,2005.Watersavinginlowlandriceproduction:Anexperimentalandmodelling
5、study.PhDthesis,WageningenUniversity,Wageningen,TheNetherlands,132pp.withEnglishandDutchsummaries.Increasingdemandforriceanddecreasingwaterdiversionstoagriculture,urgeforhigherwaterproductivityinriceproductionsystems.Onewaytodealwiththischallengeisusingwater-savingregimesonfiel
6、dscale.Themainobjectiveofthisstudywastoquantifytheeffectsofwater-savingregimesonwaterproductivity,nitrogenuseefficiency,andyieldbyacombinedexperimentalandmodelingapproach.Theroleofsubsurfacehydrologywasstudiedtoassesstheeffectsofwatersavingonthewaterbalance.Fieldexperimentswere
7、conductedatthreelocations:MuñozandLosBañosinthePhilippinesandTuanlininChina.Inexperimentscomparingalternatesubmerged-nonsubmerged(SNS)regimes⎯soilsremaineddryforseveraldaysbeforere-irrigation⎯withcontinuoussubmergence(CS),apparentnitrogenrecoveryandyieldwereatparand15−18%ofirri
8、gationwatercouldbesavedthusleadingtohigherwaterproduct
