摘要
利用CO2光合测定仪在控制叶室光合有效辐射、CO2浓度、温度和相同温度条件下,分析了云南拟单性木兰的光补偿点和饱和点及其日变化。并通对温度、土壤湿度对光合速率单因子影响的研究,得出了云南拟单性木兰在上午、中午、下午的光合补偿点分别为5.37、7.03、9.22(μmol/m2s)。光合饱和点分别为1500、2000、1750(μmol/m2s),为阳性植物。在第四季度当光照为全光照,温度大于15℃,土壤水分大于60%时,光合速率增大。
Making use of the photosgnthetic apparatus which can determine,the CO2 in controlling the efficient radiation in leaf chamker, CO2 concentration, the temperature and under the same temperature,we have analyred the light compensation point and the light saturation point and the daily change for Parakmeria yunnanensis Hu. through the research of the temperature, the soil＇s humidity that influence the photosgnthetic rate of singhe factor, we have get the conclusion： light compensation point for Parakmeria yunnanensis Hu in the morning, at noon and in the afternoon is ：1500 , 2000 ,1750 （μmol/m^2s） ,so it belongs to the masculine plants. In the fourth season, when the light become complete, the temperature is above 150℃, the soil＇s humidity is beyond 60%, the photosgnthetic rate accelarate.
出处
《云南师范大学学报（自然科学版）》
2005年第5期66-70,共5页
Journal of Yunnan Normal University:Natural Sciences Edition
基金
云南省教育厅基金(0111234)
关键词
云南拟单性木兰
昆明地区
不同温度
停止生长
土壤水分
光合速率
Parakmeria yunnanensis Hu
Kunming district
different temperature
stop growing
soil＇ s humidity
photosgnthetic rate
