火炬松光合生理生态特性研究

Research on Photosynthetic Eco-Physiology of Pinus Taeda

采用Licor-6400便携式光合作用测定系统,对11年生不同间伐处理火炬松光合生理生态因子进行了离体测定,并应用DPS系统对主要生理生态指标的特点及其与环境因子的关系进行了逐步回归分析和通径分析.结果表明,影响蒸腾速率的主导环境因子是湿度和温度因子,蒸腾速率与环境因子建立的回归方程达到极显著水平.

The photosynthetic eco-physiological factors of 11-year-old Pinus taeda with different thinning density is determined isolatedly with aportable Photosynthetic Testing System modeled as Licor-6400, and by means of DPS system, the characteristics of the main eco-physiological indexes and their correlation to environmental factors are also studied with stepwise regression and path coefficient analysis. The results show that the main factors affecting photosynthesis rate are moisture and temperature, the regression equation established with rate of photosynthesis and environmental factors reaches extremely significant level.