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湿地松林下6树种光合日变化及其与环境因子的关系(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2011年05期
Page:
135-138
Column:
研究简报
publishdate:
2011-09-30

Article Info:/Info

Title:
Daily variation of photosynthesis of six tree species under Pinus elliotii forest and their relations with environmental factors
Author(s):
WU Tonggui1ZENG Guangquan*
1.Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400,China;2.Research Institute of Forestry of Jian County, Jian 343100,China;3.Ningguo Forestry Bureau, Ningguo 242300, China
Keywords:
red soil trees understory daily course of Pn environmental factors path analysis
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2011.05.030
Document Code:
A
Abstract:
Daily variations of net photosynthesis rates (Pn) of 6 tree species in red soil under Pinus elliotii forest were determined and their relation with environmental factors were analyzed using path analysis. The daily courses of Quercus acutissima, Schima superba, Castanopsis fissa and Lespedeza bicolor showed unimodal curves, with the maximum of (1982±266), (1458±179), (1611±482), (1492±367) μmol/(m2〖DK〗·s) at 11:00 am, and Adinandra millettii, Photinia davidsoniae presented bimodal curves, with the maximum of (891±181), (1085±163) μmol/(m2〖DK〗·s). The sequence of daily average of Pn was Q. acutissima >S. superba > C. fissa > L. bicolor > A. millettii > Ph. davidsoniae, and significant differences were found among Q. acutissima, S. superba, C. fissa and A. millettii, Ph. davidsoniae (p<005). Based on pathway analysis, Pn was mainly influenced by vapor press deficit (VPD), temperature (T), relative humidity (RH) and photosynthetic active radiation (PAR) for Q. acutissima, C. fissa and L. bicolor. While S. superba was mainly influenced by VPD, T and PAR. Whereas for A. millettii and Ph. davidsoniae

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Last Update: 2011-09-30