氮素營養(yǎng)對喜樹幼苗生長及其葉片喜樹堿含量的影響.pdf

1、東北林業(yè)大學(xué)碩士學(xué)位論文氮素營養(yǎng)對喜樹幼苗生長及其葉片喜樹堿含量的影響國家自然科學(xué)基金資助項目（No.30070086）姓名：邢軍會申請學(xué)位級別：碩士專業(yè)：生態(tài)學(xué)指導(dǎo)教師：閻秀峰20030601AbstractCamptothecin(CPT)isanimportantantitumornaturalcompoundcontainingnitrogenItwasmainlyextractedfromCamptothecaacuminat

2、aTheeffectsofnitrogenlevelsandnitrogenformsonthegrowthandthecamptothecinconcentrationinleavesofCacuminataseedlingswerestudiedWealsodeterminedthechangesofnitratereductase(NR)activities，glutaminesynthetase(GS)activitiesand

3、chlorophyllconcentration，nitrogenconcentrationinleavesofCacuminataseedlingsunderdifferentofnitrogenlevelsandformstoexaminetherelationshipbetweentheabovementionedparametersofnitrogenassimilationandCPTconcentrationinleaves

4、asaffectedbynitrogenlevelsandformsTheresultsshowunderbelow：ThegrowthspeedofCacuminataseedlingsincreasedwithincreasingthenitrogenlevelsTherewasasignificantlylogarithmicrelationshipbetweengrowthspeedofplantsandthenitrogenl

5、evelsThegrowthspeedofCacuminataseedlingswashigherwhenplantsreceivedN03。thanwhentheyreceivedtwootherforms，thatisNH4andN03‘，andtherewasnoevidentlydifferencebetweenthatofthelattertwonitrogenousformsTheconcentrationofchlorop

6、hyllandnitrogen，theactivityofNRandGSinleavesofCacuminataseedlingsincreasedwitlincreasingthelevelsofnitrogennutritiousAtallthenitrogenformstreatments，thesequencesoftheconcentrationofchlorophyll，concentrationofnitrogenandt

7、heactivityofNRinleaveswereN03“N03‘NH4十NH4十，whereasthesequenceofGSactivitywasN03‘NOs‘NH，NI14TheactivityofNRandGS，theconcentrationofchlorophyllandnitrogeninthetopleaveswerehigherthanthoseofthelowerleavesofCacuminataseedlin

8、gsatallthetreatments，andtheydeclinedasthegrowthspeedofplantsdeclining，exceptforGSactivity，thelatterincreasedTheconcentrationofCPTinleavesraisedwitltheincreasingofni仃ogenlevelsatlowerlevelsrange，whereasitdecreasedinthoser

9、eceivedhighernitrogenlevelsTheconcentrationofCPTinleavesofCacuminataseedlingsreceivedN03。wasthehighestamongthoseofplantsreceivedthreenitrogenformsTheresultsindicatethattherewasnoremarkableinfluenceofNRactivity，GSactivity