三江平原典型环型湿地主要植物群落枯落物的热值变化  

Calorific Power of Litters of Main Plant Communities in Typical Annular Wetlands in Sanjiang Plain.

作　　者：蒋海东[1] 杨青[1] 吕宪国[1] 高俊琴[2] 

机构地区：[1]中国科学院东北地理与农业生态研究所 [2]中国科学院地理科学与资源研究所,北京100101

出　　处：《生态与农村环境学报》2006年第2期36-39,共4页Journal of Ecology and Rural Environment

基　　金：中国科学院知识创新工程资助项目(KZCX3-SW-NA-01)

摘　　要：研究了小叶章(Calamag rostis angustifolia)、毛果苔草(Carex lasiocarpa)和漂筏苔草(Carex pseudocuraica)群落枯落物在1个生长季内的分解热值变化特征,并初步探讨其影响因素。环型湿地3种植物群落由于各自的微环境不同致使其枯落物热值变化有所差异。6月至10月,小叶章群落枯落物热值呈现逐渐下降趋势,而毛果苔草群落和漂筏苔草群落由于所处环型湿地位置不同而形成不同于小叶章群落的湿地水热条件,从而造成其枯落物热值的总体变化趋势是先下降再上升,最后又下降。同时,同一群落不同深度枯落物热值变化也不同。0—10、10—20和20—30 cm土层热值变化相似,而30—40 cm土层热值变化规律不明显。The seasonal variation of calorific power of the litters of three typical wetland plants decomposing through one growth season were studied and its influencing factors were explored. The calorific power of the litters varied from plant community to community due to differences in their micro-environment. In the Calamag rostis angustifolia community,the calorific power tended to decline gradually from June to October, whereas in the Carex lasiocarpa community and Carex pseudocuraica community,it showed a dropped-rose-dropped trend, owing to their positions in the annular wetland leading to hydrothermic conditions different from the former＇s. The calorific power also varied with depth of the litter layer in the same community. It showed a similar trend in the depth of 0-10,10-20,20-30 era, but a significantly different one in the depth of 30-40 cm.

关 键 词：环型湿地 枯落物 热值 小叶章 毛果苔草 漂筏苔草 

分 类 号：Q947.5[生物学—植物学]