巨尾桉光合特征与水分消耗的季节适应

doi:10.11707/j.1001-7488.20100813

Scientia Silvae Sinicae ›› 2010, Vol. 46 ›› Issue (8): 84-90.doi: 10.11707/j.1001-7488.20100813

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Seasonal Variations in Photosynthesis and Water Use Efficiencyof Eucalyptus grandis × E. urophylla

Deng Yun^1,2;Zhang Lei^2,3;Wang Bing²;Su Wenhua²;Zhang Guangfei²;Deng Xiaobao¹

1.Xishuangbanna Tropical Botanical Garden，Chinese Academy of Sciences Mengla 666303；2.Institute of Ecology and Geobotany，Yunnan University Kunming 650091； 3.Yunnan Xinxing Occupations Institute Kunming 650501

Received:2009-05-20 Revised:2010-06-21 Online:2010-08-25 Published:2010-08-25

Abstract

Abstract:

The photosynthesis，transpiration and stomatal conductance of Eucalyptus grandis×E.urophylla was studied under different seasons in Lancang，Yunnan Province with Li-6400. Result showed that LSP of E.grandis×E.urophylla was 1 590 μmol photon·m^-2 s^-1 in rainfall season，and decreased to 867 μmol photon·m^-2 s^-1 in dry season. Seasonal drought enhanced stomatal limitation to both photosynthesis and transpiration. E.grandis×E.urophylla had similar change patterns of stomatal conductance and transpiration in response to irradiation intensity as native species Schima wallichii in dry season，but the photosynthesis was much higher than Schima wallichii. E.grandis×E.urophylla could adapt different water conditions in different seasons as native species.

Key words: Eucalyptus grandis×, E.urophylla, photosynthesis, transpiration, water use efficiency

Deng Yun;Zhang Lei;Wang Bing;Su Wenhua;Zhang Guangfei;Deng Xiaobao. Seasonal Variations in Photosynthesis and Water Use Efficiencyof Eucalyptus grandis × E. urophylla[J]. Scientia Silvae Sinicae, 2010, 46(8): 84-90.

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Seasonal Variations in Photosynthesis and Water Use Efficiencyof Eucalyptus grandis × E. urophylla

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