热带作物学报2009，Vol.30Issue(8)：1201-1205,5.
香根草光合特性对有效光辐射增强和CO_2浓度升高的响应
Response of Vetiver Photosynthetic Characteristics to Elevated Persistent Available Radiation and CO_2 Concentration
刘金祥 1刘海聪 1李锦添1
作者信息
- 1. 湛江师范学院热带草业科学研究所,广东,湛江,524048
- 折叠
摘要
Abstract
Photosynthetic rate (Pn),transpiration rate (Tr),intercellular CO_2 concentration (Ci),stomatal conductance(Gs) of vetiver(Vetiveri azizanioides) were measured at the controlled CO_2 concentrations of 350 μmol/mol and 700μmol/mol under continued photosynthetically active radiation (PAR). The results showed that Pn,Tr and Gs were enhanced with PAR,but not to the light saturation point even at 2 600 μmol/m~2/s of PAR. Water use efficiency(WUE) increased gradually at the initial PAR enhancement stage,reached the maximum at 1 100 μmol/m~2/s of PAR and then was gradually reduced. With the increase of CO_2 concentration,Pn,Tr and Gs decreased,while the Ci and WUE increased,but no significant difference in WUE was observed at the 2 levels of CO_2 concentration.关键词
香根草/光合特性/CO_2浓度/有效光辐射Key words
Vetiveria aizanioides/photosynthesis Characteristics/CO_2 concentration/photosynthetically
active radiation分类
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刘金祥,刘海聪,李锦添..香根草光合特性对有效光辐射增强和CO_2浓度升高的响应[J].热带作物学报,2009,30(8):1201-1205,5.
