植物光合及蒸腾特性对湿地脱氮效果的影响

Influence of plant photosynthesis and transpiration character on nitrogen removal effect in wetland.

测定了芦苇光合作用及蒸腾特性随气象和水力条件的变化,及湿地相应的脱氮效率.采用相关系数法分析了芦苇光合及蒸腾特性与脱氮效率之间的关系.结果表明,芦苇的光合作用、蒸腾作用对湿地脱氮效果影响较大,随净光合速率和蒸腾速率的增加,湿地中DO浓度上升,改善了湿地脱氮效果;湿地水深影响芦苇水分利用效率和湿地脱氮效率,与浅水位比较而言,深水位下芦苇的水分利用率和湿地脱氮效率都得到了提高.

The changes of photosynthesis action and transpiration character of reed with meteorologic and hydraulic conditions, and the relevant nitrogen removal efficiency in wetland were determined. The relation between photosynthesis and transpiration characters of reed and nitrogen removal efficiency was analyzed adopting correlation coefficient analysis technique. The photosynthesis and transpiration actions of reed had relatively greater influence on nitrogen removal efficiency in wetland, the dissolved oxygen concentration in wetland was increased and nitrogen removal efficiency in wetland was improved with the enhancement of pure photosynthesis rate and transpiration rate; the water utilizing efficiency of reed and nitrogen removal efficiency in wetland were influenced by the deepness of water in wetland, being increased under deep water level comparing to the low water level.