不同CO2浓度下长白山3种树木幼苗的光合特性

应用生态学报 ›› 2002, Vol. ›› Issue (1): 41-44.

不同CO₂浓度下长白山3种树木幼苗的光合特性

周玉梅¹, 韩士杰¹, 张军辉¹, 邹春静¹, 王琛瑞¹, 陈永亮²

1. 中国科学院沈阳应用生态研究所, 沈阳 110016;
2. 东北林业大学, 哈尔滨 150040

收稿日期:2001-02-26 修回日期:2001-05-08 出版日期:2002-01-15
通讯作者: 周玉梅,女,1973年生,博士研究生,主要从事树木生理生态研究,合作发表论文多篇.E-mail:syzymChinaRen.com
基金资助:
中国科学院知识创新工程重大项目(KZCX1SW01);国家自然科学基金资助项目(30070158)

Photosynthetic characteristics of three tree species seedlings in Changbai Mountain under different CO₂ concentrations

ZHOU Yumei¹, HAN Shijie¹, ZHANG Junhui¹, ZOU Chunjing¹, WANG Chenrui¹, CHEN Yongliang²

1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 1100016;
2. Northeast Forestry University, Harbin 150040

Received:2001-02-26 Revised:2001-05-08 Online:2002-01-15

摘要/Abstract

摘要： 选取长白山针叶树红松(Pinus koraiensis)、长白赤松(Pinus sylvestriformis)和阔叶树水曲柳(Fraxinus mandshurica)幼苗为研究对象,以开顶箱的方式控制CO₂浓度为500和700μmol·mol^-1,经过3个生长季CO₂处理后,分别测定了3个树种的3年生幼苗在高浓度CO₂和大气CO₂浓度下的光合特性.结果表明,前两个生长季高浓度CO₂处理增强了3个树种幼苗的光合能力;不同树种在相同CO₂浓度下,最大净光合速率及光响应参数值不同;第3个生长季,除500μmol·mol^-1CO₂下生长的长白赤松外,各树种的幼苗在高浓度CO₂下并未发生“光合驯化”现象;最大净光合速率及光响应参数值随CO₂处理时间的延长有不同幅度的增减;高浓度CO₂改变了树木幼苗对强光和弱光的利用能力.

Abstract: The photosynthetic characteristics of three-year-old seedlings of coniferous Pinus koraiensis and Pinus sylvestriformis and broadleaf Fraxinus mandshurica in open-top chambers in Changbai Mountain were studied.Seedlings were planted at four different conditions respectively:elevated CO₂ concentration(700 and 500 μmol·mol^-1)and ambient CO₂ concentration (control chamber and in open field).After treating of two growing seasons in the first two years,seedlings were continuously grown under different CO₂ concentration for another eight weeks.The results indicated that the photosynthetic capacity of three species was enhanced under high CO₂ concentration in the first two growing seasons.The maximum net photosynthetic rates and light response parameters of different tree species were different at the same CO₂ concentration.No photosynthetic acclimation was observed in the third growing season except Pinus sylvestriformis seedlings grown under 500 μmol·mol^-1 CO₂.The increase or decrease of net photosynthetic rates and light response parameters were related to the time of CO₂ treatment.Elevated CO₂ concentration could alter the ability of utilizing strong light and low light of seedlings.

中图分类号:

Q945.11

周玉梅, 韩士杰, 张军辉, 邹春静, 王琛瑞, 陈永亮. 不同CO₂浓度下长白山3种树木幼苗的光合特性[J]. 应用生态学报, 2002, (1): 41-44.

ZHOU Yumei, HAN Shijie, ZHANG Junhui, ZOU Chunjing, WANG Chenrui, CHEN Yongliang. Photosynthetic characteristics of three tree species seedlings in Changbai Mountain under different CO₂ concentrations[J]. Chinese Journal of Applied Ecology, 2002, (1): 41-44.

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不同CO₂浓度下长白山3种树木幼苗的光合特性

Photosynthetic characteristics of three tree species seedlings in Changbai Mountain under different CO₂ concentrations

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