北固山湿地芦苇光合作用及其与环境的关系  

Photosynthetic characteristics of Phragmites communis in Mount Beigu wetland

作　　者：李萍萍[1] 陈歆[1] 付为国[2] 吴沿友[1] 吴春笃[1] 

机构地区：[1]江苏大学农业工程研究院,江苏镇江212013 [2]南京农业大学农学院,江苏南京210095

出　　处：《江苏大学学报（自然科学版）》2005年第4期336-339,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：国家"十五"重大科技专项资助项目(2003AA601100-3)

摘　　要：对镇江北固山湿地优势植物--芦苇的光合作用进行了试验研究,并分析了芦苇的光合作用与环境的相关关系,旨在为修复该湿地提供一定的理论依据.研究表明:春夏季晴天芦苇净光合速率Pn的日变化为双峰曲线,即有明显的光合'午休'现象;多云天芦苇的净光合速率Pn主要受光强制约,随光合有效辐射PAR的变化而变化.芦苇的Pn与PAR、气孔导度Gs有显著的正相关关系,而与细胞间隙CO2浓度Ci有显著的负相关关系.在试验温度在25～35℃、大气湿度65%～90%的环境条件下,芦苇的光合作用受大气湿度和温度的影响较小,统计上未有显著的相关性.The photosynthesis of the dominant plants——Phragmites communis in the Mount Beigu wetland is studied. The relation between photosynthesis and the environment is discussed. The objective is to provide theoretic bases for the human-induced wetland restoration. The results show that in sunny days the net photosynthetic rate of Phragmites communis’s leaves have two peaks on the curves of diurnal changes and that are the phenomena of mid-day depression of photosynthesis. In cloudy days the photosynthetic rate of the Phragmites communis is affected by PAR mainly. PAR and Gs are positively related to the Pn of Phragmites communis, Ci has a negative correlation with Pn. Under the condition that the temperature between 25 ℃ and 35 ℃, the humidity between 65% and 90%, the photosynthesis of Phragmites communis is affected slightly by the temperature and humidity.

关 键 词：湿地 芦苇 光合作用 环境 

分 类 号：X171.4[环境科学与工程—环境科学] Q945[生物学—植物学]