【摘要】 通过对黄土高原常用造林树木油松的光响应曲线、ACI曲线、光合速率、气孔导度等生理特性进行测定和对比分析,结果表明:油松树种的光饱和点为750.9μmol/(m·2s),该树种在光饱和点的光合速率为5.7μmol(CO2)/(m·2s)。油松光合日进程呈单峰曲线,在一定CO2范围内,光合速率与CO2浓度呈正相关。更多还原

【Abstract】 Light curve,ACI curve ,photosynthetic rate of Pinus tabulaeformis were measured with LICOR-6400 portable photosynthesis system. The results indicated that photosynthetic rate and transpiration of Pinus tabulaeformis were not higher, at the light saturation point (CO2) were about 5.7 μmol(CO2)/(m2·s) . The photosynthetic rate and CO2 concentration appeared positive correlation.更多还原