摘要
选择晴天,利用LI-6400光合作用仪每隔1h测定1次叶片的净光合速率(Pn)。结果表明:9803杏Pn的日变化呈双峰曲线,2次高峰分别出现在10:00和15:00。Pn与光合有效辐射、气孔导度、蒸腾速率的变化规律相同,都表现出先下降后上升的趋势,而与CO2浓度和胞间CO2浓度的变化规律正好相反。9803杏的光补偿点为22.9μmol.m-2.s-1,饱和点为788μmol.m-2.s-1,CO2补偿点、饱和点分别为66.29μmol.m-2.s-1和1199μmol.m-2.s-1。
The net photosynthetic rate of leaves of 9803 apricot were studied every hour using the Li-6400 portable photosynthesis system in sunshine times. The results showed the diurnal variation of net photosynthetic rate （Pn） of 9803 apricot was two peak curve, the time are 10：00 and 15：00. Pn had the same regular with PAR, GS and Evap. The light compensation point of 9803 apricot was 22.91μmol.m^-2·s^-1,the light saturation point was 7881μmol·m^-2·s^-1, the CO2 compensation and saturation point was 66.291μmol- m^-2·s^-1 and 11991μmol·m^-2- s^-1.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2007年第4期496-499,共4页
Journal of Shenyang Agricultural University
基金
农业部"948"项目(2004-T5)
