摘要
对松嫩平原盐碱化草地羊草叶片的光合生理生态特征分析表明 ,晴朗天气条件下 ,羊草叶片净光合速率日变化呈双峰型 ,蒸腾速率属单峰型 .叶片的净光合速率、蒸腾速率及气孔阻力在整个生长季受到多个环境因子的共同影响 .不同时期起主导作用的环境因子有所差异 ,同一环境因子在不同时间对净光合速率、蒸腾速率及气孔阻力的影响程度不同 .净光合有效辐射是对羊草光合作用影响最为强烈的环境因子 。
A series of physiological characteristics of leaf photosynthesis and environmental factors are measured on Aneurolepidium chinense in Songnen salinized grassland during the growth season.The results showed that the daily change pattern of net photosynthetic rate (Pn) of Aneurolepidium chinense could be expressed as a two humped curve, the daily change pattern of transpiration rate is one humped curve.In addition,net photosynthetic rate(Pn),transpiration rate(E) and stomatal resistance(Rs) are affected by various environmental factors.At different growth stage,the influence of environmental factor on them is different,and even the same environmental factor had an different effect on Pn, E and Rs. In the whole growth period,photosynthetic available radiation(PAR) was the most intensive effect on the photosynthesis of Aneurolepidium chinense. Among Pn,E and Rs,E was one of the most obvious ecophysiological factor affected by environmental factors.
出处
《应用生态学报》
CAS
CSCD
2001年第1期75-79,共5页
Chinese Journal of Applied Ecology
基金
国家重点基础研究专项经费资助项目!(G1 9990 4 340 7)
国家自然科学基金重点项目!(39730 1 1 0 )
重大项目!(393930 0 2 )
中国
关键词
光合作用
蒸腾作用
气孔阻力
环境因子
相关关系
羊草
Photosynthesis, Transpiration, Stomatal resistance, Environmental factors, Correlation.
