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[1]WANG Chen,YU Xin-xiao,CHEN Li-hua,et al.Response of Stem Radial Variation That Caused by Sapflow and Meteorological Factors[J].Research of Soil and Water Conservation,2010,17(01):45-49,55.

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Response of Stem Radial Variation That Caused by Sapflow and Meteorological Factors

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 01 Page number: 45-49,55 Column: Public date: 2010-02-20

Title:: Response of Stem Radial Variation That Caused by Sapflow and Meteorological Factors

Author(s):: WANG Chen, YU Xin-xiao, CHEN Li-hua, ZHU Jian-gang, LIANG Qi-peng; Key Laboratory of Soil and Water Conservation & Desertification Combating, Ministry of Education, Beijing Forestry University, Beijing, 100083, China

Keywords:: stem perimeter; stem perimeter growth; sap flow velocity; meteorological factors; soil water potential

CLC:: Q945.17;P463.22

DOI:: -

Abstract:: By the Application of improved SF-L type thermal dissipation sap flow velocity measuring device and DC-type plant growth measuring device,with the meteorological data from June to October in 2007 of Beijing,we discussed the relationship between the meteorological factors and the stem perimeter dynamic factors and sap flow velocity of Pinus tabulaeformi,Platycladus orientalis in Beijing mountain areas.Extract radial growth from the stem circadian cycle,by divide the circadian cycle into phases.The results show that:(1)There is remarkable correlation between the sap flow velocity and the stem perimeter(P<0.01),positive correlation for Pinus tabulaeformis and negative correlation for Platycladus orientalis.(2)The stem perimeter changes is remarkably correlated to air vapor pressure deficit,daily temperature difference,air humidity and sunshine hours.But in the regression fitting,the explanations for Platycladus orientalis only include air vapor pressure deficit and daily wind speed,and in low degree(0.356).(3)In the research of Pinus tabulaeformi and Platycladus orientalis,the fitness of stem perimeter growth is high,meteorological impact factors are identical,and the sap flow velocity in Platycladus orientalis becomes one of the explanations.

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