摘要
以粗毛淫羊藿为材料，利用LI-6400型便捷式光合作用测定系统，研究其光合速率的变化及其环境影响因素。结果表明，淫羊藿净光合速率为2．1～2．55μmolCO2／（m^2·s），净光合速率、气孔导度和蒸腾速率的日变化均呈单峰曲线，净光合速率的峰值出现在10：00时，整体上淫羊藿上午的光合速率高于下午的光合速率。蒸腾速率的峰值出现在12：00。相关性分析表明，粗毛淫羊藿叶片净光合速率与气孔导度、相对湿度呈显著正相关，与温度呈极显著负相关，与胞间CO2浓度呈负相关，但不显著。
The diurnal change of photosynthetic rate of Epimedium acuminatum franch and its environmental affecting factors were studied by using LI-6400 portable photosynthesis system. The results showed that its net photosynthetic rate （NPR） was 2. 1 ～ 2. 55 μmol CO2/（m^2 · s）, the diurnal change of net photosynthetic rate, stomatal conductance and transpiration rate all showed a single peak curve pattern, the peak of NPR and transpiration rate appeared at 10：00 am and 12：00 am respectively and NPR in the morning was higher than in the afternoon as a whole. There was a significant positive correlation between NPR and stomatal conductance and between NPR and relative humidity. There was a significant negative correlation between NPR and temperature and a negative correlation between NPR and intercellular CO2 concentration.
出处
《贵州农业科学》
CAS
2008年第5期31-33,共3页
Guizhou Agricultural Sciences
关键词
粗毛淫羊藿
光合特性
净光合速率
蒸腾速率
Epimedium acuminatum Franch
photosynthetic characteristic
net photosynthetic rate
transpiration rate
