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太岳山典型阔叶乔木冠层叶片性状的分布格局(PDF)

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2012年04期
页码:
483-金钟藤种子低萌发率原因探讨
栏目:
植物生态与生物多样性保护
出版日期:
2012-07-25

文章信息/Info

Title:
Distribution pattern of leaf traits in canopy of typical broadleaved trees in Taiyue Mountain
作者:
苗艳明 吕金枝 毕润成*
山西师范大学 生命科学学院
Author(s):
MIAO YanMing L JinZhi BI RunCheng*
School of Life Sciences, Shanxi Normal University
关键词:
比叶面积 单位面积叶氮含量 单位重量叶氮含量 单位重量的叶光饱和速率 单位面积的叶光饱和速率 光合氮素利用效率
Keywords:
specific leaf area areabased leaf nitrogen content massbased leaf nitrogen content net photosynthesis based on mass saturated photosynthetic rate photosynthetic nitrogen use efficiency
分类号:
Q945
DOI:
-
文献标识码:
A
摘要:
以太岳山4种阔叶乔木不同冠层高度的叶片为研究对象,用LI3000A叶面积仪和Li6400便携式光合作用测定系统分别测定了这4种乔木不同冠层高度叶片的叶面积大小和单位面积的叶光饱和速率(Aarea);同时测定了其叶氮含量;计算了其比叶面积(SLA)、单位面积叶氮含量(Narea)、单位重量叶氮含量(Nmass)、单位重量的叶光饱和速率(Amass)和光合氮素利用效率(PNUE),对植株不同冠层高度叶片的SLA、叶氮和光合特性的空间分布格局进行了比较研究,结果表明:Aarea、Amass、Nmass、PNUE、SLA和Narea在树冠上层、中层和下层的差异均达到了极显著水平(P<0.001),表明树冠不同高度的叶片性状参数差异较大;在相同SLA下,Nmass和Narea在冠层中的分布均表现为中层>上层>下层,并出现平行位移现象;Aarea和Nmass都以中层值最大,表明冠层光合能力分布格局以中层相对较高。
Abstract:
Leaves of 4 different specie of broadleaved trees were investigated at Qiliyu Farm in Taiyue Mountain of southern Shanxi Province. The leaf area was estimated with Li3000A Leaf Area Meter,the saturated photosynthetic rate(Aarea)with Li6400 portablephotosynthesis system. The nitrogen content was measured by spectrophotometric method;quantified correlations among SLA,leaf nitrogen content per unit area(Narea),leaf nitrogen content per unit mass(Nmass),net photosynthesis based on leaf mass(Amass)and photosynthetic nitrogen use efficiency(PNUE)were performed and the comparison of the distribution pattern of SLA,leaf nitrogen content and photosynthetic traits among different plant canopies showed that there were significant differences(P<0·001)among Aarea、Amass、Nmass、PNUE、SLA and Narea in top,middle and bottom layers. It also showed that there were significant differences of leaf traits parameters among the three canopies. Under the same SLA,Nmaaa and Narea of leaves in the canopy all declined in the sequence of middle layers>top layers>bottom layers. It was found that there was a strategy shift in the Nmass and Narea. The middle layers had the higher Aarea and Nmass than top slices and bottom slices, which showed that the middle layers had the highest leaf photosynthetic capacity.

参考文献/References

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2012-07-25