摘要
为了探讨仙客来光合特性及环境因子对仙客来光合速率的影响 ,对仙客来叶片光合速率及主要环境因子的周年变化进行了研究。结果表明 :仙客来在晴天光合速率周年的日变化呈双峰曲线。强光、高温和低湿引起仙客来叶片光合“午睡”。中位叶光合速率、光饱和点和光补偿点等较下位叶高 ,具有较高的光合生理特性。同时进行遮荫和喷雾处理可以明显改善植株生长发育的小气候条件 ,降低高温的抑制 ,从而提高光能利用效率 ,降低夏季休眠 ,促进球茎形成 ,有利于翌年春季开花。图 2表 2参 1
In order to discuss photosynthetic characteristics of Cyclamen persicum leaves and effects of environmental factors on photosynthetic rate,the experiments were conducted to study diurnal changes and seasonal fluctuation of the net photosynthetic rate and major environmental factors.The net photosynthetic rate reaches peaks at 10:22 and 13:42 respectively in dry heat conditions.And it reaches also peaks on June and October in one year respectively.Hard photosynthetic photon flux,high air temperature and low relative humidity result in 'sleeping at noon'for Cyclamen persicum leaves.The diurnal changes and seasonal fluctuation of net photosynthetic rate are affected by major factors,i.e.photosynthetic photon flux,air temperature,stomatal conductance,transpiration and relative humidity as well.The net photosynthetic rate,the light saturating photosynthetic rate and the light compensation photosynthetic rate of middle part leaf are higher than those of lower part leaf.Shading and spraying are contributed to improving the microclimate condition of Cyclamen persicum growth,increasing anti high temperature and efficiency for sloar energy utilization,decreasing 'sleeping in summer'.
出处
《浙江林学院学报》
CAS
CSCD
北大核心
2001年第4期366-370,共5页
Journal of Zhejiang Forestry College
关键词
仙客来
叶片
光合特性
环境因素
日变化
年变化
Cyclamen persicum
photosynthesis
environmental factors
diurnal changes
annual changes
