氮素營(yíng)養(yǎng)對(duì)喜樹(shù)幼苗生長(zhǎng)及其葉片喜樹(shù)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(yíng)養(yǎng)對(duì)喜樹(shù)幼苗生長(zhǎng)及其葉片喜樹(shù)堿含量的影響國(guó)家自然科學(xué)基金資助項(xiàng)目（No.30070086）姓名：邢軍會(huì)申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)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