摘要
乌拉苔草沼泽是长白山沟谷湿地的重要类型 ,对其光合速率研究的结果表明 ,乌拉苔草光合速率日变化呈单峰曲线 ,最高峰出现在 1 0时 ,最大值是 1 8.0 7μmol(CO2 ) / (m2 ·s) ;与其该群落伴生的修氏苔草光合速率日变化出现“午休”现象。影响光合速率最大的环境因素是光量子通量密度和叶温 ,呈极显著的正相关 ,其他因素亦多呈正相关 ,环境因子综合影响了乌拉苔草的光合日进程。乌拉苔草光合作用的日总同化量为 1 896 0 1 .2 μmol(CO2 ) /m2 。
The photosynthesis rate of Carex meyeriana ecosystem in the gouge wetland with special ecological environment in changbaishan mountain was investigated, the results indicated that the diurnal variation of Carex meyeriana appeared single peak curve with the peak value presented at 10∶00 am, the value was 18.07 μmol(CO 2)/(m 2·s). The companion community, Carex schtnidtii , has the three peaks in the curve of daily variation of photosynthesis rate, with the peak occurred at 13∶00 pm, the value was 14.2μmol(CO 2)/(m 2·s). The essential environmental factors for photosynthesis rate were photons flux density and leaf temperature with high R 2. It was negative correlation for other factors and Pn has been presented. Environmental factors played the integral role in influencing the photosynthesis rate of Carex meyeriana .
出处
《湿地科学》
CSCD
2004年第2期128-132,共5页
Wetland Science
基金
松嫩平原湿地的生态保育与高效利用示范 (吉林省农业综合开发重点项目 )
国家"十五"科技攻关专题 ( 2 0 0 1ba5 0 8b2 4)
关键词
乌拉苔草
光合速率
生态环境
植物
光合作用
Changbaishan mountain gouge
wetland
Carex meyeriana
photosynthesis rate
diurnal variation
environmental factor
