| 遮阴对狼尾草光合特征的影响 |
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| 引用本文： | 刘宗华,袁小环,崔敏,张志国. 遮阴对狼尾草光合特征的影响[J]. 安徽农业科学, 2009, 37(10): 4476-4478 |
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| 作者姓名： | 刘宗华 袁小环 崔敏 张志国 |
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| 作者单位： | 山东农业大学资源与环境学院,山东泰安,271018;北京草业与环境研究发展中心,北京,100089;北京草业与环境研究发展中心,北京,100089;山东省日照市岚山区林业局,山东日照,276807;上海应用技术学院生态技术与工程学院,上海,200235 |
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| 基金项目： | 北京市科技计划项目(D08050600120802); 北京市农业科技项目(20080803) |
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| 摘 要： | [目的]为狼尾草栽培技术的优化及其在园林中的正确应用提供理论依据。[方法]采用LI-6400XT便携式光合系统分析仪测定0（对照）、25%、50%和75%遮荫处理下狼尾草（Pennisetum alopecuroides）的叶片光合参数,并测定叶片叶绿素含量与比叶重。[结果]全光照狼尾草的光补偿点（LCP）和光饱和点（LSP）分别为37.24和1892.42μmol/m^2·s。遮荫25%、50%、75%处理的狼尾草LCP较全光照分别降低了11.39%、29.11%和63.16%,差异显著,而其表观量子效率（AQY）、LSP、最大净光合速率（Pmax）基本没受影响。遮荫25%、50%、75%处理的狼尾草叶绿素a、b及总叶绿素含量分别较对照增加了48.25%、72.22%和53.07%。遮荫75%处理的比叶重较全光照降低了29.50%。[结论]狼尾草能适应一定的弱光环境,但75%遮荫会显著降低其光合效率,影响其正常生长。
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| 关 键 词： | 净光合速率 光饱和点 光补偿点 表观量子效率 叶绿素含量 比叶重 |
Effects of Shading on the Photosynthetic Characteristics of Pennisetum alopecuroides |
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| LIU Zong-hua et al. Effects of Shading on the Photosynthetic Characteristics of Pennisetum alopecuroides[J]. Journal of Anhui Agricultural Sciences, 2009, 37(10): 4476-4478 |
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| Authors: | LIU Zong-hua et al |
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| Affiliation: | LIU Zong-hua et al(College of Resources , Environment,Sh,ong Agricultural University,Taian,Sh,ong 271018) |
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| Abstract: | [Objective] The aim was to supply theoretical basis for optimizing the cultivation technology of Pennisetum alopecuroides and its correct application in gardens.[Method] The photosynthetic parameters of P.alopecuroides leaves in treatments with shading degree at 0(CK),25%,50% and 75% were determined by LI-6400XT portable photosynthetic system analyzer and their chlorophyll contents and specific leaf weights were determined.[Result] The light compensation point(LCP) and light saturation point(LSP) of P.alope... |
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| Keywords: | Pennisetum alopecuroides Net photosynthesis LSP LCP Apparent quantum yield Content of chlorophyll Specific leaf weight |
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