摘要
大白菜结球初期叶片光合最适温度为２５℃。低温下光合速率（Ｐｎ）和表现量子效率（ＡＱＹ）随叶温升高而增加，超过２５℃则随叶温升高而降低。无论温度高低，大白菜叶片的Ｐｎ在一定范围内随光强和ＣＯ２浓度的升高而升高，但２０～３０℃条件下Ｐｎ上升幅度较大。大白菜叶片光合作用的光补偿点随叶温升高而增加，光饱和点在１５～２５℃范围内随温度升高而升高，超过２５℃则随温度升高而下降。ＣＯ２补偿点和饱和点均随温度升高而增加，且高温条件下增加幅度大。
The optimum timperature of chinese cabbage’s phototsynthesis was 25℃ in early stage of heading.Under low temperature the photosynthetic rate and apparent quantum yield increased with the increasing of temperature.But they decreased over 25℃.Whether the temperature was high or low.The photosythetic rate of chinese cabbage leaves increased with the increasing of PFD and CO 2 concentration in certain range.Furthermore,it increased markedly under 20￣30℃.Light compensation point photosynthesis increased with the increasing of leaf temperature.Light saturation point increased with increasing of temperature in 15￣25℃ and decreased when over 25℃.CO 2 compensation point and saturation point increased with the increasing of temperature,and the range of increasement through higher temperature was greater,than through lower temperature.
出处
《山东农业大学学报（自然科学版）》
CSCD
1998年第3期379-383,共5页
Journal of Shandong Agricultural University：Natural Science Edition
关键词
大白菜
光合速率
温度
结球初期
chinese cabbage
photosynthetic rate
temperature.
