松嫩草地虎尾草光合与蒸腾作用的研究

Photosynthesis and evaporation of Chloris virgata in alkalized meadow on Songnen plain of China

松嫩平原盐碱化草甸上的虎尾草叶片光合与蒸腾作用的日变化均呈单峰曲线 ,且在午间 12时均达到最高峰。单因子相关分析得出 ,虎尾草叶片净光合速率与光强呈显著正相关。蒸腾速率与光强、叶面温度、大气温度均呈极显著正相关。在生态因子中 。

The diurnal changes in both photosynthesis and transpiration of Chloris virgata in alkalized meadow on the Songnen Plain are characterized with a single peak curve, with the peak occurring at noon. It is shown that the net photosynthetic rate of leaves is positively correlated to the intensity of radiation ( P ≤0.05). The rate of evaporation is positively correlated to radiation, leaf temperature and air temperature( P ≤0.05). Among the above factors, the intensity of radiation is the most important factor determining the rates of photosynthesis and evaporation of Chloris virgata .