ORYZA2000模型模擬旱稻的適應性檢驗及優(yōu)化灌溉研究.pdf

1、Y774036分類號；密級：單位代碼：10019學號：S02152，，田蘆t式粵碩士學位論文ORYZA2000模型模擬旱稻的適應性檢驗及優(yōu)化灌溉研究Ewduationof0RyZA2000ModelforAerobicRiceandStudiesonOptimizationofIrrigation研究生：醒昌題指導教師：揚瞳迸副教援申請學位門類級別：理堂殛專業(yè)名稱：氫鑫堂研究方向：佳塑生籃撞拯攫型所在學院：蟹邃皇巫撞堂院二零零五年六月A

2、bstractEvaluationsofORY已虻螂∞modelforaerobicrice曲297werestudiedbyparameters’calibratiousandvalidationsbasedon3yearsfieldexperimentsfrom2002to2004conductedinChangpingExperimentStation(40002N，116。10’E，elevation43m)ofChinaAgr

3、icultureUniversityinBeijingAndafterthat，ORYZA2000ricemodelwagusedtoanalyzetherelationsbetweenyieldandwateruseofaerobicriceHD297，andtostudyonoptimumirrigationsofaerobicriceinBeijingareaFirstly，theexperimentresultsof2003we

4、reusedtodothecalibrationstoobtainthecIopparametersofaerobicriceHD297thenthe0RYZA2000modelwerevatidatedonsimulatingbiomassleafareaindexandfinalyieldofHD297andsoilwatertensionbyusingtheexperimentdataof2002and2004Inthevalid

5、ation，thefollowingindiceswereselected：theslope(a)’intercept(B)’andaajustedcoefficientofcorrelation(R2)oflhelinearregressionbetweensimulatedandmeasuredvalues，thestudentsttestofmeansassumingunequalvarianceP(t‘)’aswellasthe

6、rootmeansquareerror(RMSE)andthenormalizedrootmeansquareerror(NRMSE)TheaverageofNRMSEofthes；mulatlonsoftotalbiomassaboveground，greenleafbiomass，stembiomass，paniclebiomass，LUandfinalyieldforthetwoyearsisrespectively29，5％，3

7、35％，35％，30％，46％and14％，SimulatedsoilwatertensionsfitwelJwithmeasuredsoilwatertensionsSotheevaluationresultshasshowedthattheORYZA20000modelissufficientlygoodIosimulatethegrowthanddevelopmentandfinalyieldofHD297aswellassoil

8、watertensiononlywithalittlehighersimulationerrorsofLUAnalysisofyieldandwateruseofHD297inBeijingweredonebasedonthedailymeteorologydatafrom1971to2000bytheOIWZA2000modelwhichhasbeenevaluatedandtheresultsshowthattheaveragepo

9、tentialyieldof30yearsis8573kg／hm‘，andtheaveragerainfedyieldof30yeatsis40836kg，llmzAveragemaximumwaterrequirementfortllewholegrowthseasonis7127ram，buttherainfallofgrowthseasonindifferentyearsvarieslargelyandthereis50％year

10、sinwhichwatershoflagereachesasmuchas30％Irrigationwaterrequirementinthegrowthseasoavariesform150to400ramindifferentyearsMeanwhiletheanalysisprovesthatwateruseefficiencycanbehptatIhehigheilevelsifirrigallonwaterwasgivenwhe

11、nrelativesoilwtatercontentwasatthe1evelof670％Also，theoptimumirrigationschemesfordifferentyearsfrom1971to2000wereanalyzedaimedatthreeyieldlevel，70％，80％and90％ofpotentialyieldForthe70％ofpotentialyieldlevelthereare233％ofally

12、earsinwhichthersinfedyieldcanreachthislevelwithoutirrigationsthemaximumirrigationwaterrequirementinotheryearsis300rambutin53’3％yearsitisbelow200mmTheirrigationwateruseefficienciesfbrthe70％potentialyieldlevelarebetween144

13、g／kgand1521g／kgForthe80％ofpotentialyieldlevel，inallyearstheremustbeirrigationsteachthisyieldlevel，themaximumirrigationwaterrequirementis350mmandtheirrigationwaterUSeefficienciesisbetwoen15g／kgand16199／kgAndforlhe90％ofpot