不同基质对黄菖蒲光合特性及净化能力的影响

选择5种基质，采用盆钵实验研究了不同基质对黄菖蒲光合速率、 蒸腾速率和SPAD值的影响及其与污水净化能力之间的相互关系.结果表明,不同基质影响了黄菖蒲的净光合速率与蒸腾速率，其中土壤上黄菖蒲的净光合速率与蒸腾速率最高，分别为11.67 μmol·(m²·s)^-1和9.18 mmol·(m²·s)^-1，而沙子上黄菖蒲的净光合速率与蒸腾速率最低，分别为8.38 μmol·(m²·s)^-1和4.55 mmol·(m²·s)^-1，且黄菖蒲的净光合速率、 蒸腾速率与高锰酸盐指数、NH⁺₄-N和NO^-₃-N的去除率呈显著正相关（p﹤0.05）.不同基质上黄菖蒲的SPAD值存在差异，以土壤上黄菖蒲的SPAD值最高（58.92），有机质+沙+土其次，而沙子上黄菖蒲的SPAD值最低（51.14）；黄菖蒲的SPAD值与净光合速率和蒸腾速率呈显著正相关（p﹤0.05），且与NH⁺₄-N的去除率也呈显著正相关（p﹤0.05）.不同基质上黄菖蒲的SPAD值存在差异，可以用SPAD仪快速监控人工湿地氮的去除.

Effect of Different Substrates on Photosynthetic Characteristics of Iris pseudacorus L. and the Capacity of Purify Wastewater

The effect of the different substrates on the photosynthetic characteristics,transpiration rate and SPAD value,and capacity of purify wastewater was investigated by pot experiment,based on five ordinary substrates(soil,sand,mixture of soil and sand,mixture of sand and organic matter,and mixture sand,soil and organic matter).Results showed that the photosynthetic characteristics and transpiration rate of Iris pseudacorus L.were influenced by different substrates.The order of the photosynthetic and transpirat...