环境因子和生物因子对黄河三角洲滨海湿地土壤呼吸的影响  

Effects of environmental and biotic factors on soil respiration in a coastal wetland in the Yellow River Delta,China

作　　者：陈亮[1] 刘子亭[1] 韩广轩[2] 初小静 孙宝玉[2] 刘海防 李建文 

机构地区：[1]聊城大学环境与规划学院,山东聊城252000 [2]中国科学院烟台海岸带研究所海岸带环境过程与生态修复重点实验室,山东烟台264003 [3]山东省黄河三角洲国家级自然保护区管理局,山东东营257500

出　　处：《应用生态学报》2016年第6期1795-1803,共9页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(41301083);中国科学院科技服务网络计划项目(KFJ-EW-STS-127)资助~~

摘　　要：采用Li-8150多通道土壤呼吸自动测量系统对黄河三角洲滨海湿地土壤呼吸进行全年连续测定,同步测量了温度、土壤含水量、地上生物量以及叶面积指数等环境因子和生物因子.结果表明:土壤呼吸日动态在全年尺度上多呈单峰型,但在受到土壤封冻和地表积水干扰时,土壤呼吸日动态呈多峰型.土壤呼吸具有明显的季节动态特征,总体呈单峰型,年平均土壤呼吸速率为0.85μmol CO_2·m^(-2)·s^(-1),生长季平均土壤呼吸速率为1.22μmol CO_2·m^(-2)·s^(-1).在全年尺度上,土壤温度是滨海湿地土壤呼吸的主要控制因子,可解释全年土壤呼吸87.5%的变化.在生长季尺度上,土壤含水量和叶面积指数对土壤呼吸的协同影响达到85%.Using the Li-8150 multichannel automatic soil CO_2 efflux system,soil respiration was measured continuously over a one-year period in a coastal wetland in the Yellow River Delta,China.Environmental and biological factors were measured simultaneously,including temperature,soil water content,aboveground biomass and leaf area index. The results showed that the diurnal variation of soil respiration presented a single-peak curve,but it appeared as multiple peaks when disturbed by soil freezing and surface flooding. Soil respiration showed obvious seasonal dynamics and a single peak curve. The average annual soil respiration was 0.85 μmol CO_2·m-（-2）·s-（-1）,and the mean soil respiration rate was 1.22 μmol CO_2·m-（-2）·s-（-1）during the growing season. On one-year scale,soil temperature was a major factor influencing soil respiration in the coastal wetland,which explained 87.5% of the variation in soil respiration. On the growing season scale,soil water content and leaf area index accounted for 85% of the seasonal variation of soil respiration.

关 键 词：滨海湿地 土壤呼吸 环境因子 生物因子 黄河三角洲 

分 类 号：S154[农业科学—土壤学]