摘要
生态系统热能值结构的形成是一段时间内太阳能在生态系统中能量流动达到动态平衡的一种形式。为了研究三江平原环形湿地热能值结构的特点,我们选择三江平原典型环形湿地———中国科学院三江平原沼泽湿地生态试验站作为研究区域,对环形湿地不同植物群落土壤热能值进行测试与分析。研究结果表明,三江平原典型环形湿地热能值地上部分以乌拉苔草—毛果苔草群落和大穗苔草—漂筏苔草群落最高,而沼柳—越菊柳—小叶章群落和毛果苔草—狭叶甜茅—漂筏苔草群落相对较低。地下部分,在泥炭层以上的几个层次,从环形湿地中心到边缘,热能值逐渐增加,而在泥炭层及泥炭层以下,热能值逐渐减少。除泥炭层外,各层中以乌拉苔草—毛果苔草群落的热能值最高。垂直方向上,各个群落以须根层处热能值最大。这种热能值结构是生物与环境长期作用的结果,特别是在一些环境梯度较大的过渡位置,由于其边界效应,热能值一般较高。对环形湿地热能值结构的研究可为湿地生态系统合理的利用和保护提供一些合理建议。
The caloric value structure of ecosystem was one of dynamic balance states that formed by solar energy flowing in the ecosystem in a period of time. We chose the typical annular wetlands of Sanjiang Plain as research sits, which was Sanjiang Plain Marsh Ecological Experiment Station, and analysed the soil caloric value of different community for research the character of soil caloric value of annular wetlands. The results showed that the caloric value of aboveground of Ass. Carex casioeaepa-Carex meyeriana and Ass. Carex casiocaepa-Carex meyeriana was higher, and the caloric value of aboveground of Ass. Carex easiocarpa - Cxyceria spiculosa-Carex seudoeurqiea and Ass. Salix brachypada - Myrtilloides-Deyeuxia angustifola was lower. The caloric value of underground up the peat horizon gradually raised from center to edge of annular wetlands. The caloric value of underground down the peat horizon gradually lowered from center to edge of annular wetlands. The calorie value of Ass. Carex easioeaepa - Carex meyeriana was highest in all the soil layers except peat horizon. The fibre layer was highest in four community soil layers. The caloric value structure of wetlands was the results of long-term interaction between biology and environment, especially the transition sit which caloric value was always higher. The studies on the caloric value structure of wetlands would contribute to wetlands protection and utilization in reason.
出处
《土壤通报》
CAS
CSCD
北大核心
2006年第1期27-31,共5页
Chinese Journal of Soil Science
基金
中国科学院知识创新工程项目资助(KZCX3-SW-NA-01)
中科院湿地重点实验室基金(WELF-2004-B-002)
关键词
热能值
结构
环形湿地
土壤
三江平原
Caloric value
Soil
Structure
Annular wetlands
Sanjiang Plain
