早银桂光合作用日变化的研究  

A study on Photosynthesis Diurnal variation of Osmanthus fragrans 'Zaoyingui'

作　　者：张晓琳[1] 臧德奎[1] 丁旭升[2] 吕晓贞 孙坚红[2] 

机构地区：[1]山东农业大学林学院,山东泰安271018 [2]杭州市园林绿化工程有限公司

出　　处：《山东林业科技》2010年第3期30-32,共3页Journal of Shandong Forestry Science and Technology

摘　　要：对早银桂光合速率进行了测定。通过研究早银桂在当地的日变化规律,了解其光合特性,为夏季栽培管理提供参考。结果表明:早银桂日变化曲线呈双峰型,峰值出现在10:00和16:00,有明显的光合午休现象。气孔因素是导致午休的主要原因,同时也受非气孔因素的影响,中午光照强度大,温度高,湿度低,诱导了叶片光合午休。早银桂的净光合速率与蒸腾速率、气孔导度呈明显的正相关关系,与气温、有效光合辐射等生态因子也有较强的相关性。The photosynthetic characteristics of Osmanthus fragrans ＇Zaoyingui＇ were researched by CIRAS-2 portable photosynthesis system.The result shows that the diurnal net photosynthetic rate of Osmanthus fragrans ＇Zaoyingui＇ in sunny day varied with two peak curves.The peaks occurred at 10：00 and 16：00.It had midday depression obviously.Stomatal factors are the main reason of midday depression.Intensity PAR,high temperature and low humidity induced midday depression of photosynthesis.The net photosynthetic rate of Osmanthus fragrans ＇Zaoyingui＇ has a significant positive correlation between a transpiration rate and stomatal conductance;it also has a strong relationship with temperature,effective photosynthetic radiation and other ecological factors.

关 键 词：早银桂 光合作用 日变化 

分 类 号：S781[农业科学—木材科学与技术]