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[1]LIU Min,FANG Jiang-ping.Response of Quercus aquifoliodes Net Photosynthetic Rate to Environmental Factors in Tibet[J].Research of Soil and Water Conservation,2008,15(03):263-265.

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Response of Quercus aquifoliodes Net Photosynthetic Rate to Environmental Factors in Tibet

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 15 Number of periods: 2008 03 Page number: 263-265 Column: Public date: 2008-06-20

Title:: Response of Quercus aquifoliodes Net Photosynthetic Rate to Environmental Factors in Tibet

Author(s):: LIU Min, FANG Jiang-ping; Institute of Plateau Ecology, College of Tibetan Agriculture and Husbandry, Linzhi, Tibet 860000, China

Keywords:: Quercus aquifoliodes; net photosynthetic rate; daily change; air temperature; strength of illumination

CLC:: Q945.11;X171

DOI:: -

Abstract:: The daily chang of net photosynthetic rate (NPR) and its response to environment factors such as quantum radiation,relative humidity and CO₂ concentration of Quercus aquifoliodes was monitored with a portable photosynthesis system.It is showed that the maximal NPR happened at 11:00,then the rate decreased and down below zero at about 20:00 in which Quercus aquifoliodes entered dark respiration.From the Quercus aquifoliodes date advancement,the leaf blade has obvious the phenomenon.Under the condition of air temperature (15.5±2)℃,relative humidity 48%±5%,and CO₂ concentration 386.5 μmol/mol,the light compensation point of Quercus aquifoliodes is about 22 μmol/(m²·s) and its light saturation point is about 1 029 μmol/(m²·s).Under the condition of relative humidity 48%±5%,and CO₂ concentration 381.5 μmol/mol and saturated luminous intensity 800 μmol/(m²·s),net photosynthetic rate of Quercus aquifoliodes is high at 15~30℃.

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