Abstract：To understand the decomposition of three plants litter types in constructed wetland， the litter decomposition was studied by using the mesh bag method during one year. The storage， decomposition dynamics， and its response to water table drawdown from three plants litter types (Canna indica， Typha angustifolia， and Pontederia cordata) were investigated in the constructed wetland in suburban Wuhan City. This results showed that the litter storage of the Canna indica， Typha angustifolia， and Pontederia cordata were 1 887.83， 1 073.25， and 2 358.86 g·m-2， respectively. During one year， there were significantly different in decomposition rate among three litter types (p<0.05)， and their decomposition rate were 63.5% for Canna indica， 46.5% for Typha angustifolia， and 61.1% for Pontederia cordata， respectively. In addition， the Olson classical exponential model showed that the litter decomposition rate of Canna indica (k＝0.063) was highest， followed by Pontederia cordata (k＝0.047)， and Typha angustifolia (k＝0.032). During standing litter， the leaf decomposition rate in the constructed wetland was 6.9%， 8.6%， and 6.9% lower than that on the surface， for Canna indica， Typha angustifolia， and Pontederia cordata， respectively. With the water table draw-down， the litter decomposition rate from the Canna indica， Typha angustifolia， and Pontederia cordata have increased in the shore zone of wetlands by 33.8%， 42.5% and 69.6% compared with that in flooding zone， respectively. These results suggested that the warming climate might decrease the water table in the shore zone of wetlands， and then increase the carbon emission of the wetlands.
周文昌,史玉虎,潘 磊,郑兰英,庞宏东. 人工湿地3种植物凋落物分解及其对水位降低的响应[J]. 华中师范大学学报(自然科学版), 2019, 53(2): 242-247.
ZHOU Wenchang,SHI Yuhu,PAN Lei,ZHENG Lanying,PANG Hongdong. Decomposition of three plant litter types in the constructed wetland and its response to water table draw-down. journal1, 2019, 53(2): 242-247.
2019, Vol. 53 
