摘要
以白及为试材,采用Li-6400便携式光合仪,研究比较了白及在6月份、8月份及10月份的光合日变化。结果表明:白及光合速率日变化曲线都有午休现象,其中6月份的光合速率最高,9:00出现峰值,为8.1μmol·m-2·s-1;8月份的光合速率也在9:00最高,为5.81μmol·m-2·s-1,10月份的光合速率整体都很低,平均为3.31μmol·m-2·s-1。相关性分析结果显示,6月份及10月份光合速率与光合有效辐射、气孔导度呈正相关,影响光合速率的因素气孔因子占主导地位。
Taking Bletilla striataas materials,the diurnal variation of photosynthetic in June,and August and October by using the Li-6400 photosynthetic system was studied and compared.The results showed that,diurnal variation of photosynthetic rate had a‘midday depression’phenomenon,and the photosynthetic rate in June was stronger when there was the strongest photosynthesis and the maximum value reached to 8.1μmol·m-2·s-1 at 9：00.The maximum value in autumn was also at 9：00reached to 5.81μmol·m-2·s-1,and the photosynthetic rate in October was total low whose average value was only 3.31μmol· m-2·s-1.There was a significant positive correlation between net photosynthetic rate and light intensity in June and October,and the photosynthetic rate of Bletilla striata mainly determined by stomata factors.
出处
《北方园艺》
CAS
北大核心
2014年第22期162-165,共4页
Northern Horticulture
基金
植物学湖南省"十二五"重点建设学科资助项目
怀化市科技局重点资助项目
关键词
白及
光合特性
不同月份
日变化
Bletilla striata
photosynthetic characteristics
different months
diurnal variation
