Photosynthetic characteristics of Cryptomeria fortunei and Cupressus funebris in different site types

Cryptomeria fortunei and Cupressus funebris, which were in Beichuan and Anxian counties of the earthquake disaster areas, were studied in this paper. Photosynthetic characteristics were measured by Li6400 in May 2010 on nonlandslide, landside and local collapse site types. The results showed that Pn, Tr, Ci and gs of C. fortunei exhibited same changing rules in different site types, ie nonlandslidelocal collapselandside; and Tr, Ci and gs of C. fortunei in nonlandslide and landside were significant different; WUE of C. fortunei on landslide forestland was the highest by 394 μmol/mmol, and there was no significant differences among varied site types. For C. funebris, Pn and Tr showed the rule of local collapsenonlandslidelandside forestland; Pn and Tr in local collapse were 91.10%，119.69% and 47.50%，73.52% higher than those in nonlandslide and landside forestland respectively, which were significant different between local collapse and landslide. In three site types, Pn and Tr of C. funebris were lower than those of C. fortunei, while WUE of C. funebris was higher than that of C. fortunei.