| 张永霞,李国旗,闫伟兄,谢亚军,朱莉,万海霞,张浩.红麻和白麻光合特性研究[J].干旱地区农业研究,2008,(2):102~105 |
| 红麻和白麻光合特性研究 |
| A study on photosynthetic characteristics of Apocynum Venetum L and Poacynum pictum Baill |
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| DOI：10.7606/j.issn.1000-7601.2008.02.21 |
| 中文关键词: 红麻 白麻 光合特性 净光合速率 日变化 |
| 英文关键词:Apocynum Venetum L Poacynum pictum Baill photosynthetic characteristics net photosynthetic rate(Pn) diurnal changes |
| 基金项目:教育部新世纪优秀人才支持计划(NCET-05-0896)； 国家林业局“948”项目(2004-04-10) |
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| 中文摘要: |
| 用CIRAS-1便携式光合测定仪分别测定红麻和白麻的光合参数。结果表明:红麻和白麻的光合日变化均为典型双峰曲线,主峰值出现在上午10∶00左右,次峰出现在下午14∶00,具有明显的光合“午休”现象。红麻和白麻的净光合速率(Pn)随光合有效辐射(PAR)的增加而迅速升高,光补偿点(LCP)分别为84.9μmol/(m2·s)和85.8μmol/(m2·s),光饱和点(LSP)分别为1 860μmol/(m2·s)和1 618μmol/(m2·s)。红麻和白麻CO2补偿点分别为74.8μmol/mol和49.3μmol/mol;CO2饱和点分别为1 597μmol/mol和1 737μmol/mol,这表明白麻对高浓度的CO2适应能力和利用能力比红麻强。 |
| 英文摘要: |
| The photosynthetic parameters of dogbane(including Apocynum venetum L and Poacynum pictum Baill)were measured with CIRAS-1 portable photosynthesis system in the sunshine days of September.The results showed that the diurnal change of photosynthesis rate (Pn) of dogbane displays a double-peak manner thus suffering a noon inhibition.Their first peak occurred at 10∶00 AM while the second peak appeared at 14∶00 PM.The net photosynthetic rate (Pn) of dogbane increases rapidly with the rising of Photosynthetic Active Radiation(PAR).The light compensation point(LCP) of A.Venetum and P.pictum are 84.9 μmol/(m2·s) and 85.8 μmol/(m2·s) respectively for mature leaves,and the light saturation point(LSP) is 1 860 μmol/(m2·s) and 1 618 μmol/(m2·s) respectively. The CO2 compensation point(CCP) of A.Venetum and P.pictum is 74.8 and 49.3 μmol/(m2·s),respectively,and the CO2 saturation point(CSP) are 1 597 μmol/(m2·s),and 1 737 μmol/(m2·s),which demonstrates that P.pictum is adapted to higher CO2 concentration than A.Venetum. |
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