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生态学杂志 ›› 1991, Vol. ›› Issue (6): 30-33.

• 研究报告 • 上一篇    下一篇

红松光合作用日进程测定

文诗韵, 杨思河, 尹忠馥   

  1. 中国科学院沈阳应用生态研究所, 110015
  • 收稿日期:1991-01-26 修回日期:1991-03-21 出版日期:1991-12-10

Diurnal Course of Photosynthesis of Korean Pine

Wen Shiyun, Yang Sihc, Yin Zhongfu   

  1. Institute of Applied Ecology, Academia Sinica, Shenyang 110015
  • Received:1991-01-26 Revised:1991-03-21 Online:1991-12-10

关键词: 季节性冻融, 红桦凋落叶, 土壤动物, 质量损失率, 亚高山森林

Abstract: The diurnal course of net photosynthesis of Korean pine and related environmental factors are measured in situ, using an improved gas exchange system. An introduction is also given for the improved measurement device and the technique of boundary-line analysis for analysing data. The diurnal course of photosynthesis is shown to be dependent largely on weather conditions, such as light, temperature and relative air humidity, Boundary-line analysis for the response of photosynthesis to light indicate that, the photosynthetic rate of Korean pine is 6.27μmol·100g-1·s-1: light saturation point is 800μE·m-2·s-1, and when effective radiation is below 800μE·m-2·s-1, light becomes a limiting factor for photosynthesis. The depression of photosynthesis at midday is mainly caused by high air temperature and low relative humidity.

Key words: freeze-thaw season, Betula albosinensis leaf litter, soil fauna, mass loss rate, subalpine primary forest