節(jié)水灌溉下旱稻水肥利用研究及ORYZA2000模型的應(yīng)用.pdf

1、咿8(J媯6J分類號華中農(nóng)業(yè)大學(xué)碩士學(xué)位論文密級節(jié)水灌溉下旱稻水肥利用研究及ORYZA2000模型的應(yīng)用STUDYONWATERANDFERTILIZERUTILIZATIONOFUPLANDRICEUNDERWATERSAVINGIRRIGATIONANDAPPLICATIoNOFORYZA2000MODEL研究生：指導(dǎo)教師：屈曉芳呂國安教授專業(yè)：土壤學(xué)研究；hN：水土資源利用與保護(hù)獲得學(xué)位名稱：農(nóng)學(xué)碩士獲得學(xué)位時間：年月日華中農(nóng)業(yè)大

2、學(xué)資源與環(huán)境學(xué)院二00五年五月望主查些查蘭堡主蘭堡堡苧!!!i生!旦——AbstractThesubjectisbasedonthewatersavingirrigationforriceandhadmadeastudyontheeffectofdensityandNfertilizeranddifferentwatersavingmethodsonuplandricewithasplitplotexperiments111eexper

3、imentswereperformedinHuibeiwaterresourcesscienceexperimentalstationinKaifeng，Henanprovincein2004Themaintreatmentwasirrigationregimes(Wl：water—savingirrigation(Flushingirrigationat一30kPa)，W2：Rainfedwithsurvivalirrigation)

4、Thesub—treatmentisN—fertilizerapplicationratefNl：225kgN／hm2；N2：300kgNIbm2)Thesub—subtreatmentwasdensity(DI：spacingbetweenrOWSwas30cm；D2：spacingbetweenrowswas24cm)ThevarietiesoffertilizersareN—urea，PCa(H2P04)2，K—KCl，Zn—Zn

5、S04，F(xiàn)e—FeS04Themainresultswerebelow：1Inthisstudyleafareaindex，panides／m2，biomassofleavesandstemswerehigerinhighdensitythaninlowdensityHowevertherootlengthbiomassofrootandratioofroottoshootwerehigherundertheW2treatmentwim

6、relativelesswaterthanthoseundertheWItreatmentwithrelativemorewaterTherearcnodifferencesforplantheightamongthealltreatments2ThereWasauendthatnitrogencontentofroot，stemandleafintheW2treatment塒t11relativelesswaterwerehigher

7、thanthoseintheWItreamaent、vimrelativemorewaterrespectlyespeciallyinthevegetativegrowthstageHowevertherespectiveN—cumulantinroot，stemandleafwerehigerinthehighdensitythaninthelowdensitytreatment，AmongtheNfertilizertreatmen

8、ts，nitrogencontentandNcumulantwerehighcrinhi曲NfertilizertreatmentthaninlowNfertilizertreatment，duringtheearlygrowthseasonsbutnOdifferencesduringthelategrowthseasonsThepercentageofNingrainwashigerinlowN—fertilizertreatmen

9、tthaninhighNfertilizertreatment3Comparingtheyieldcomponents，thepaniclesNo／m2Washigherinhighdensitytreatmentsthaninlowdensitytreatments；andhigherinlowNfertilizertreatmentthaninhighN—fertilizertreatmentHoweverthefilledgrai

10、nsnumbersperpaniclewasjustcontrary耵legrainyieldhadasimilarregulationtothatofpaniclenumbers／m2butthethousandgrainweightandthefilledgrainratehadnodiffierencesbetweendifferenttreatmentsInthisstudytheoptimumNapplicationratew

11、as225kgN／hm2anddirect—seedingdensityWas24cmbetweentherowswithseedrate1875kg／hm24WaterproductivitywashigherinlowN—fertilizerthaninhighNfertilizerWhileintwowatertreatments，waterproductivityofW1treatmentwithrelativemorewate