Abstract: Leaf photosynthetic characteristics of five tree species, i.e. Dalbergia odorifera, Acrocarpus fraxinifolius, Erythrophleum fordii, Castanopsis hystrix and Betula alnoides seedlings were studied in this paper. The results showed that D. odorifera, B. alnoides and A. fraxinifolius had higher light saturation point (LSP) and light compensation point (LCP) than C. hystrix and E. fordii, so that the former group could make better use of highintensity illumination, while the later group could tolerate shading. High utilization capacity of CO₂ (i.e. lower carbon dioxide compensation point (CCP) and higher carboxylation efficiency (CE)) enabled D. odorifera with high photosynthetic capacity. Balanced supply capacity of CO₂ (i.e. stomatal conductance (g_s) and intercellular CO₂ concentration (C_i)) and utilization capacity of CO₂ enabled A. fraxinifolius with high photosynthetic capacity too. Although B. alnoides had high capacity of supplying CO₂ to photosynthetic apparatus, low capacity of using CO₂ limited its photosynthetic capacity. E. fordii and C. hystrix had low supply and utilization capacity of CO₂, resulting in their lower photosynthetic capacity than the other tree species.

Key words: climate change, climate resource, meteorological disaster, winter planting, spatio-temporal change, extreme disaster.