摘要
本文研究了南川升麻在林缘、林窗和林下３种生境中的光合特性和光合、呼吸日进程。结果表明，在３种生境下光补偿点无显著差异，在２０μｍｏｌ·ｍ－１·ｓ－２左右，而光饱合点则有较大差异。在３种生境下的光合日变化曲线均为单峰曲线，无“午休”现象，光合峰值是林缘＞林窗＞林下。影响光合日进程的最主要的生态因子为光合有效辐射强度；光合最适温度较低。呼吸日进程在３种生境下没有显著差异，与温度日变化基本一致。
In this paper,the characteristics and diurnal development of photosynthesis and respiration of cimicifuga nanchuanensis in edge forest,forest gap and down forest were studied.In three habitats,the difference in compensation point of light was not significant,But the light saturation points were very different;The order of photosynthesis peak value was edge forest>forest gap>down forest;The most important ecological factor affecting the photosynthesis was PAR;The optimal temperature for photosynthesis was rather low.The diurnal development of respiration in the three habitats had little difference,correspondent to the diurnal change of air temperature.
出处
《植物生态学报》
CAS
CSCD
北大核心
1999年第1期71-75,共5页
Chinese Journal of Plant Ecology
基金
国家自然科学基金
东北林业大学森林植物生态学实验室基金
关键词
濒危植物
南川升麻
光合作用
Endangered plant, Cimicifuga nanchuanensis ,Photosynthesis
