中文摘要：

采用分解袋法对闽江河口鳝鱼滩湿地分布的土著种芦苇、短叶茳芏以及外来入侵种互花米草沼泽湿地枯落物分解过程的能量动态进行了研究．结果表明：在近潮沟样地（样地A），3种植物枯落物热值整体表现为先降后升的趋势，互花米草、短叶茳芏和芦苇枯落物热值均在第280天达到最大值，分别为：18．02，18．87，18．61kJ·g^-1．在远潮沟样地（样地B），3种植物枯落物热值变化呈现先升后降再升趋势．在A、B样地，3种植物枯落物的总能量随着分解过程中枯落物残留量的减少逐渐降低，样地A三种植物枯落物能量释放率是短叶茳芏〉互花米草〉芦苇；样地B较为复杂，但总体来看，短叶茳芏能量释放率大于互花米草和芦苇．

英文摘要：

During the decomposition process plant litter would release energy and its calorific power varies with the decreasing litter. Mesh bags were used to measure the calorific power changes and energy dynamics during the decomposition of Phragmites australis, Cyperus malaccensis and Spartina alterniflora （ an exotic invasive species） in the Minjiang River estuary wetland. The results showed that the caloric power of three wetland plants＇ litter increased during the decomposition and simultaneously achieved maximum at the 280th day with 18.02 kJ ~ g-l （S. alterniflora） , 18.87 kJ - 1 ~ （P. australis） in site A （ near to a tidal ditch） In site ~ g （ C. malaccensis） and 18.61 kJ ~ g - B （ further away from tidal ditch）, the caloric power changes of the three litters generally took a ris- ing trend at the beginning of decomposition and then decreased , and then increased . In site A and site B, the gross caloric value decreased in the process of decomposition with the reduced energy re- maining of the dry mass. Energy releasing rate during decomposition in site A was highest in C. malaccensis litter and lowest in P. australis litter. The variety characters of energy releasing rate in site B were relatively complex, as a whole, higher in C. malaccensis litter and lower in S. alterniflora litter as much as P. australis litter.