13C/12C ratio and water use efficiency of Pinus massoniana in subtropical artificial forest

Abstract

Abstract: The ¹³C/¹²Cratio, photosynthetic rate and stomatie conductivity of leaves of Pinus massoniana, Schima superba,Psychotria rubra, Evodia lepta and Rhodomyrtus tomentasa are measured. No significant deviation (at 5% level) is observed between water use efficiencies calculated by these items. The¹³C/¹²Cis 25.41±0.61‰. In average for treerings of Pinus massoniana from 1971 to 1983(n=6), with the maximum in1977 when the lowest precipitation was recorded. The average water use efficiency of Pinus massoniana is 8.28±0.38 in1977—1983, which is higher than that of trees in natural site and might be caused by the changes of solar radiation and water condition. ¹³C/¹²Cratio ana lysis could provide usefull informations for studying water use efficiency of artificial forest.

Key words: Pinus massoniana, ¹³C/¹²C ratio, Water use efficiency, PCA, Lake Gehu, spatial distribution pattern, biodiversity, macrozoobenthos

Sun Guchou, Lin Zhifang, Lin Guizhu, Li Shuangshun . ¹³C/¹²C ratio and water use efficiency of Pinus massoniana in subtropical artificial forest[J]. Chinese Journal of Applied Ecology, 1993, 4(3): 325-327.

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¹³C/¹²C ratio and water use efficiency of Pinus massoniana in subtropical artificial forest

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