摘要
以叶片光合作用观测资料为基础,利用直角双曲线与非直角双曲线两种方法对长白山阔叶红松林的主要建群树种红松(Pinuskoraiensis)、紫椴(Tiliaamurensis)、蒙古栎(Quercusmongolica)、水曲柳(Fraxinusmandshurica)光合作用的光响应曲线进行了拟合.结果表明,两种方法拟合结果不同,直角双曲线方法简单,但非直角双曲线的拟合结果更符合生理意义.由直角双曲线拟合得出4个树种的初始量子效率α、最大净光合作用速率Pmax以及暗呼吸Rd大于非直角双曲线的拟合结果,而光补偿点Lcp随树种不同而有差异.两种方法得出4个树种的α、Rd大小顺序相同,分别是α为水曲柳>紫椴>蒙古栎>红松;Rd为水曲柳>蒙古栎>紫椴>红松,但由两种方法得出的Pmax、Lcp值大小顺序有差异.
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 （ α）, 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 α and Ra obtained from the two hyperbolae had the same sequences, i. e. , F. mandshurica 〉 T. amurensis 〉 Q. mongolica 〉 P. koraiensis for α, and F. mandshurica 〉 Q. mongolica 〉 T. amurensis 〉 P. koraiensis for Rd, but for Pmax and L the sequences were not the same.
出处
《应用生态学报》
CAS
CSCD
北大核心
2006年第9期1575-1578,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(30370293)
中国科学院知识创新工程项目(KZCX1-SW-01-01A1)
中国科学院沈阳应用生态研究所知识创新工程资助项目(SCXZD0101-03-01).
关键词
光合作用
光响应曲线
初始量子效率
最大光合作用速率
光补偿点
暗呼吸
Photosynthesis, Light response curve, Intrinsic quantum efficiency of CO2 uptake, Light-saturatednet photosynthetic rate, Light compensation point, Dark respiration rate.
