摘要
用CIRAS-2便携式光合测定系统,以2年生红楠为试材,研究了红楠苗期的光合特性.结果表明,苗期红楠叶片光合速率日变化呈单峰曲线型,最高峰出现在10:00左右,峰值持续时间相对较长,不存在光合午休现象;光补偿点(LCP)为41μmol.m-2.s-1,光饱和点(LSP)为1 200μmol.m-2.s-1,表观量子效率(AQY)为0.041 8μmol.mol-1,表明红楠应属于阳性树种.
The photosynthetic characteristics of 2-year old seedling of Machilus thunbergii were studied using CIRAS-2 portable photosynthesis system.The results showed that the diurnal net photosynthetic rate of M.thunbergii in sunny day varied with unimodal curve.The peak occurred at 10：00 a.m.and lasted a long time.There was no midday depression.The light saturation point（LSP） and light compensation point（LCP） of leaves were 1200 and 41μmol·m-2·s-1 respectively,and the apparent quantum yield（AQY） was 0.0418μmol·mol-1,showing heliophilous species＇ characteristics.
出处
《湖北民族学院学报（自然科学版）》
CAS
2010年第3期298-301,共4页
Journal of Hubei Minzu University(Natural Science Edition)
关键词
红楠
光补偿点
光饱和点
单峰曲线
Machilus thunbergii
light compensation point
light saturation point
unimodal curve
