羊草呼吸作用与温度、光照和土壤水分的关系

THE RELATION BETWEEN THE RESPIRATION AND TEMPERATURE, LIGHT ILLUMINATION, SOIL WATER FOR ANEUROLEPIDIUM CHINENSE

本文报道了两种土壤水分条件下羊草明呼吸速率与光照和温度的关系,以及暗呼吸速率与温度的关系。结果表明,羊草的明呼吸速率与光强呈非线性函数关系。在低光强下,明呼吸速率随光强升高而有较快的增加;随着光强的增高,其增加速度减慢。在温度低于羊草光合的高温补偿点的条件下,明呼吸速率在一定温度范围内随温度升高而增大;当温度达到一定限度时,有一个下降阶段,而后又回升。羊草的暗呼吸速率随温度增加而升高,且在一定限度内,其升高速度随温度增高而加快。当土壤干旱时,明呼吸速率显著降低,而暗呼吸速率仅略有减小。

This paper deals with the relation between light respiration rate and ill- umination, temperature, as well as the relation between dark respiration rate and temperature for Aneurolepidium chinense under two soil water conditions. The result shows that the relationship between light respiration rate and light intensity is a nonlinear function. Light respiration rate increases quickly with increasing light intensity when light intensity is lower, while at higher lightr intensity, the rate increases much slowly. When the temperature is lower than high temperature compensation point of photosynthesis for A. chinense, light respiration rate increases with the increasing temperature within limits; when temperature reaches a certain limit, the rate decreases and then increases once again. Dark respiration rate increases with increasing temperature and incre- asing velocity of the rate accelerates with the increase of temperature within limits. When the soil becomes dry, light respiration rate decreases markedly and dark respiration rate decreases slightly.