Study on the Diurnal Variations of Photosynthesis of Phyllostachys praecox(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Study on the Diurnal Variations of Photosynthesis of Phyllostachys praecox

Author(s):: HUANG Zhen-juan¹; JIANG Hong²; 1.Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration，Zhejiang Agriculture and Forestry University，Hangzhou，Zhejiang 311300；
2.International Institute for Earth System Science，Nanjing University，Nanjing,Jiangsu 210093

Keywords:: Phyllostachys praecox; diurnal course; net photosynthetic rate; transpiration rate; photosynthesis

Abstract:: Taking Phyllostachys praecox as material，the photosynthesis and its environmental factors of diurnal course discipline of Taihuyuan Phyllostachys praecox were measured using Li-6400.Its important parameters of the correlation had been analyzed by SPSS 19.0 software.The results showed that the photosynthesis of Taihuyuan Phyllostachys praecox showed a clear day change rule.Photosynthesis rate and photosynthetic active radiation were in ‘unimodal’ curve changes，and there was no ‘midday depression’.Diurnal intercellular CO₂ concentration was in ‘unimodal’ curve changes，and the change rule of photosynthesis rate was inverse relationship changes；transpiration rate and stomatal limitation of present day change was ‘unimodal’ type，the stomatal conductance were revealed ‘bimodal’ type rule changes.Correlation analysis results showed that the net photosynthetic rate (Pn) affected the most significantly with the factor PAR，followed by Gs，VPD，Tleaf，Tair and RH respectively；transpiration rate (Tr) affected the most significantly with the factor was Gs，second was RH，PAR，Tair,Tleaf and VPD.

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Last Update: 2014-08-26