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采用红外线气体分析仪的测定方法研究了我国中亚热带东部马尾松光合速率和呼吸速率与环境因子的关系。结果表明： 马尾松叶片光合速率与光强和气温多元相关呈极显著水平， 其回归方程可作为光合速率估算的模型； 日光合量与平均气温呈极显著线性正相关， 呼吸速率与气温呈极显著相关， 其回归方程均可作为叶片日光合量和呼吸速率的估算模型。马尾松叶片的年净光合量和年呼吸量（ Ｃ Ｏ２） 估算结果分别为２１１ ×１０４ ｍｇ·ｄ ｍ － ２ 和２３８ ×１０４ ｍｇ·ｄｍ － ２ 。表２ 参５
The relationship between the photosynthetic rate and respiration rate and environmental factors of Pinus massoniana in the eastern subtropics of China was studied by using the infrared gas analyzer. The results showed that the photosynthesis rate of P. massoniana was significantly correlated with the light intensity and air temperature, and the regression equation could be used as a model to estimate the photosynthetic rate. There was a significant linear positive correlation between photosynthesis and mean air temperature, the respiratory rate and temperature were extremely Significantly related, the regression equation can be used as leaf photosynthesis rate and respiratory rate estimation model. The annual net photosynthesis and annual respiration (C O2) estimation of P. massoniana leaves were 211 × 104 mg · dm - 2 and 238 × 104 mg · dm - 2, respectively. Table 2 reference 5