This article chose Prunus sibirica,Ailanthus altissima,Robinia pseudoacacia,Pinus tabulaeformis,P. sylvestris var. mongolica as the research object. These afforestation species have important ecological value in western Liaoning. In the growing season,we de-termined and studied the photosynthetic characteristics which would be the physiological base of these trees’drought resistance. The main results were as follows:The daily variation curve of photosynthetic rate on Armenniaca sibirica was double-peak type,but other species’was single-peak type.Compared average photosynthetic rate value of the five species,broadleaf species is higher than the co-niferous species. It showed that Ailanthus altissima had higher potential photosynthetic productivity than other species. Compared av-erage transpiration rate value of the five species,The order from high to low was Ailanthus altissima>Prunus sibirica>Robinia pseu?doacacia>Pinus sylvestris var. mongolica>P. tabulaeformis.The daily variation curve of five species’stomatal conductance and tran-spiration rate presented significant relevance.The order of average stomatal conductance value from high to low was Ailanthus altissi?ma>Robinia pseudoacacia>Pinus sylvestris var. mongolica>Prunus sibirica>P. tabulaeformis.It showed that Pinus tabulaeformis and Prunus sibirica had the stronger ability which prevented water to be lost from stomatal. And they had the excellent foundation of drought resistance.
western Liaoningafforestation tree speciesphotosynthetic characteristics
NETL
NSTL
维普
万方数据
