Zhang Mi, Wu Jiabing, Guan Dexin, Shi Tingting, Chen Pengshi, Ji Ruipeng
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang.
Ying Yong Sheng Tai Xue Bao. 2006 Sep;17(9):1575-8.
Based on the measurements of leaf photosynthesis, the light response curves of Pinus koraiensis, Tilia amurensis, Quercus mongolica and Fraxinus mandshurica photosynthesis in broadleaved Korean pine forest of Changbai Mountains were fitted with rectangle and non-rectangle hyperbolae. The results showed that rectangle hyperbola was simpler for fitting, while non-rectangle hyperbola was more reasomable because of its fitted results better matched physiological meanings. The values of intrinsic quantum efficiency for CO2 uptake (alpha), light-saturated net photosynthetic rate (Pmax), and dark respiration rate (Rd) of the four tree species were higher when fitted with rectangle hyperbola than with non-rectangle hyperbola, while that of light compensation point (Lcp) varied with tree species. The values of alpha and Rd obtained from the two hyperholae had the same sequences, i.e., F. mandshurica > T. amurensis > Q. mongolica > P. koraiensis for alpha, and F. mandshurica > Q. mongolica > T. amurensis > P. koraiensis for Rd, but for Pmax and Lcp, the sequences were not the same.
基于叶片光合作用的测定，采用直角双曲线和非直角双曲线对长白山阔叶红松林内红松、紫椴、蒙古栎和水曲柳的光合作用光响应曲线进行拟合。结果表明，直角双曲线拟合较为简单，而非直角双曲线因拟合结果更符合生理意义而更为合理。用直角双曲线拟合时，4个树种的CO₂吸收的表观量子效率（α）、光饱和净光合速率（Pmax）和暗呼吸速率（Rd）值均高于用非直角双曲线拟合时的值，而光补偿点（Lcp）的值因树种而异。两种双曲线得到的α和Rd值排序相同，即α为水曲柳＞紫椴＞蒙古栎＞红松，Rd为水曲柳＞蒙古栎＞紫椴＞红松，但Pmax和Lcp的排序不同。
