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《自由大气CO_2浓度升高对夏大豆光合色素含量和光合作用的影响-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、中国摩亏c亟报2012,28(06):47-52ChineseAgriculturalScienceBulletin自由大气CO2浓度升高对夏大豆光合色素含量和光合作用的影响高霁.一,郝兴宇一,居烽,李迎春,林而达。(’首都师范大学,北京100048;中国农业科学院农业环境与可持续发展研究所,北京100081;山西农业大学,山西太谷030801)摘要:研究大气CO:浓度升高对大豆光合指标的影响,有助于了解未来气候变化后大豆光合生理的变化。利用开放式自由大气CO:浓度富集系统(FreeAirCO2Enric
2、hment)在高CO2浓度(550+60~tmol/mol左右)和对照大气CO:浓度(平均389~40lxrnol/mol左右)及2种施氮水平下种植‘中黄35’和‘中黄13’大豆品种,测定了2个大豆品种的叶绿素、类胡萝卜素含量及光合作用的变化。结果表明:CO:浓度升高对大豆功能叶光合色素含量的影响存在品种差异,初花期‘中黄13’光合色素含量变化不显著,但在盛英期光合色素显著下降,且在低肥处理下更明显,对‘中黄35’没有影响。大气CO:浓度升高后,2个品种大豆净光合速率均明显升高,气孔导度下降。大豆净光合速
3、率提高将促使作物积累更多的有机物,有利于作物生物量和产量的提高。气孔导度下降可能会使作物蒸腾作用减弱,有利于作物水分利用率的提高。关键词:气候变化;cO浓度;夏大豆;光合色素;光合作用中图分类号:S162.5文献标志码:A论文编号:2011.2316EfectofElevated[C02】onPhotosyntheticPigmentContentsandPhotosynthesisofSummerSoybeanGaoJi-2,3,HaoXingyu,JuHui。,LiYingchun。,LinErda0
4、(CapitalNormalUniversity,Beijing100048;21nstituteofEnvironmentandSustainableDevelopmentinAgriculture,ChineseAcademyofAgriculturalSciences,Beijing100081;ShanxiAgriculturalUniversity,TaiguShanxi030801)Abstract:Researchonphotosynthesisparameterofsummersoybea
5、nresponsetoelevated[CO2】couldhelptolearnaboutphotosynthesisphysiologicalchangesofsummersoybeanunderfutureClimateChange.Theobjectiveofthisstudywastoinvestigatetheeffectofelevated(550_60mmol/mo1)【CO2】onphotosyntheticpigmentcontents,photosynthesisoftwosoybea
6、ncuhivars(‘Zhonghuangl3’and‘Zhonghuang35’)withtwonitrogenlevelsattheFree-AirCarbondioxideEnrichment(FACE)experimentalfacility.Theresultsshowedthatthereactionofphotosyntheticpigmentcontentsincludingchlorophylla,chlorophyllb,totalchlorophyllcontentsandcarot
7、enoidcontentsofsoybeantohighCO2levelswasdifferenceforthetwosoybeans.Itwasnotchangedfor‘Zhonghuang35’infloweringandpodperiodbutreducedfor‘Zhonghuangl3’inpodperiod.Thephotosyntheticrates(Pn)ofthetwocultivarssoybeanwereincreasedandthestomatalconductancewasde
8、creasedwiththehighCO2leve1.Pnincreasecouldhelpsoybeantobetterusethelight,accumulatemoreorganismsandincreasethebiomassandyield.Thestomatalconductancedecreasemightreducethesoybeantranspiration(,whichcouldpromotethewat
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