%0 Journal Article
%T 不同功能型植物叶氮含量与光合特性的关系研究
%A 苗艳明；吕金枝；毕润成*
%J 植物研究
%D 2012
%R 10.7525/j.issn.1673-5102.2012.04.009
%X 摘要： 在山西南部的霍山七里峪林场，确定乔木、灌木和草本物种共26个，用Li-3000A叶面积测定仪测量了叶面积的大小、用Li-6400便携式光合作用测定系统测定了叶光饱和速率（Aarea），计算了比叶重（LMA）、单位重量的光饱和光合速率（Amass）、单位面积叶氮含量(Narea)、单位重量叶氮含量(Nmass)及光合氮利用效率(PNUE)，研究了它们之间的不同和相互作用关系。结果表明：不同功能型植物的Nmass、Aarea、Amass、Narea和PNUE差异显著(p<0.05)，植物叶片氮含量与植物光合生理特性具有显著相关关系，Nmass与Aarea、Amass和PNUE呈线性显著的正相关(p<0.05)；Narea与Aarea、Amass、PNUE之间呈极显著的负相关(p<0.01)
%K In Huoshan Mountain
%K sampling plots were set up at Qiliyu Farm for field investigation
%K trees
%K shrubs and grasses in 26 species were identified. The leaf area was measured with Li-3000A Leaf Area Meter
%K and the saturated photosynthetic rate (<em>A</em><sub>area</sub>) was determined with Li-6400 portable photosynthesis system. The leaf mass per area (<em>LMA</em>)
%K The net photosynthesis based on mass (<em>A</em><sub>mass</sub>)
%K leaf nitrogen content per unit area (<em>N</em><sub>area</sub>)
%K leaf nitrogen content per unit mass (<em>N</em><sub>mass</sub>) and photosynthetic nitrogen use efficiency (<em>PNUE</em>) were quantified
%K the differences and interactions among three plant functional types (PFTs) were studied. The results showed that there were significant differences (<em>p</em><
%K 0.05) in <em>N</em><sub>mass</sub>
%K <em>A</em><sub>area</sub>
%K <em>A</em><sub>mass</sub>
%K <em>N</em><sub>area</sub> and <em>PNUE</em> of three PFTs. The photosynthetic characteristics were significantly correlated with leaf nitrogen content
%K <em>N</em><sub>mass</sub> was significantly correlated with <em>A</em><sub>area</sub> (<em>p</em><
%K 0.05)
%K <em>A</em><sub>mass</sub> and <em>PNUE</em>
%K while <em>N</em><sub>area</sub> was significantly positively correlated with <em>A</em><sub>area</sub>
%K <em>A</em><sub>mass</sub> and <em>PNUE </em>(<em>p</em><
%K 0.01).
%U http://bbr.nefu.edu.cn/CN/10.7525/j.issn.1673-5102.2012.04.009