有機(jī)-礦質(zhì)復(fù)合材料控釋尿素氮素利用率的研究.pdf

1、東北農(nóng)業(yè)大學(xué)碩士學(xué)位論文有機(jī)礦質(zhì)復(fù)合材料控釋尿素氮素利用率的研究姓名：焦曉光申請學(xué)位級別：碩士專業(yè)：土壤學(xué)指導(dǎo)教師：羅盛國2001.5.1質(zhì)復(fù)合材料控釋尿素氮素利用率的研3焦曉光EfectsofOrganicmineralCompondCoatedUreaonNitrogenUtilizationEficiencyABSTRACTInthisstudywedeterminedtheamountsofNH3volatilizationni

2、trateleachingandresidualureafrom3newlycreatedcontrolledreleaseureas(CRU)insandysoilandblacksoilinlaboratoryandinvestigatedtheirefectsonnitrogenutilizationeficiency(NUE)onyieldsofsoybeanandriceaswellasonqualityofsoybeanby

3、ESNtracingpotcultureandplotexperiment.Themainresultsobtainedareasfollowing:1.Allofthe3controlledreleaseurea(referredasCRUZCRU2andCRU3)decreasedtheamountofN143volatilizationinsandysoilandblacksoilandthedecreaserangesforCR

4、UZCRU2andCRU3were33.3%2.5%and15.13%comparedwithcommonureainsandysoiland42.6%37.3%and39.9%respectivelyinblacksoil2.TheNlossesthroughnitrateleachingwerereducedmarkedlyinsandysoilbyapplicationofcontrolledreleaseureascompare

5、dwithcommonureaandthereducedpercentagesforCRUZCRU2andCRU3were36.06%15.49%and30.03%respectively3.IncubationexperimentinthelaboratoryshowedthattherewasmoreureawhichwaskeptinCRUtreatedsoilsthanincommonureatreatedsoilsandthe

6、highestresidualureaoccurredinCRUItreatedsoils.Theamountofresidualureawashigherinblacksoilthaninsandysoil4.ThenitrogenutilizationeficiencywasimprovedbyapplicationofCRU.TheNIJEofCRUinsoybeanwasincreased勿11.33%3.06%and5.59%

7、comparedwithcommonureatreatedsoybean.Thecorrespondingvalueswere3.64%19.92%and10.53%inrice.ForsoybeanCRUZwasthebestandforriceCRU2gavethebestresults5.CRUssignificantlyincreasedtheI00grainweightofsoybeanand1000grainweightof

8、riceandthereforeincreasedtheyieldofsoybeanandrice.InpotcultureexperimenttheyieldincreasesinCRUtreatedsoybeanwere49.22%37.48%and22.56%comparedwithCKF=23.90F0.01=6.99Inplotexperimentwithsoybeantheyieldincreasedby15.8%6.83%

9、and6.63%comparedwithCKF=7.73F0.05=4.76Inpotculturedricetheyieldincreaseswere34.59%，18.56%and8.66%comparedwithCKF=88.49Fo.ol=6.996.CRUapplicationincreasedtheproteincontentofsoybeanaswellF=9.88F0.01=6.99indicatingthatCRUca