其他题名Effects of change in precipitation amount on soil respiration and photosynthetic characteristics of Phragmites australis in a coastal wetland in the Yellow River Delta,China
陈亮; 孙宝玉; 韩广轩
; 刘子亭; 贺文君; 王安东; 吴立新发表期刊应用生态学报
ISSN1001-9332
2017-09-15
卷号28期号:9页码:2794-2804
关键词change in precipitation amountthe Yellow River Deltacoastal wetlandsoil respirationphotosynthesis降雨变化黄河三角洲滨海湿地土壤呼吸光合作用
DOIDOI:10/13287/j.1001-9332.201709.039
产权排序(1) 聊城大学环境与规划学院; (2) 中国科学院烟台海岸带研究所中国科学院海岸带环境过程与生态修复重点实验室; (3) 山东省黄河三角洲国家级自然保护区
作者部门海岸带环境过程实验室
英文摘要The coastal wetland has shallow underground water level and is affected by the fresh water and salt water in vertical direction. The changes in precipitation amount can alter the conditions of soil water and salt,thus affecting soil respiration and plant photosynthesis. In order to clarify the effect of the change in precipitation amount on soil respiration and photosynthetic characteristics,we used rainout shelters and rainwater pipes to manipulate precipitation amount in the coastal wetland in the Yellow River Delta. Soil respiration and photosynthetic light response curve of Phragmites australis were measured during the growing season in 2015. Moreover,environmental factors including soil temperature,soil water content and soil salt content were measured simultaneously. The results showed that the whole growing season could be divided into three periods,drought period,wet period and flooding period,according to soil moisture condition. The effect of precipitation change on soil respiration and photosynthetic characteristics of P. australis was controlled by soil moisture condition. During the drought period,increased precipitation increased soil respiration significantly by 31.8% compared to the control. In addition,increased precipitation also increased stomatal conductance(g_s)and photosynthetic capacity of plant leaf compared with those in the control,while decreased precipitation decreased soil respiration significantly by 41.1% compared with that in control. Meanwhile,decreased precipitation decreased the stomata obstruction and photosynthetic capacity of P. australis. During the wet period,soil respiration and the temperature sensitive of soil respiration(Q_(10))decreased in both increased and decreased precipitation treatments. Increase and decrease in precipitation amount both had no significant effect on the light response curve of P. australis. During the flooding period,increase and decrease in precipitation amount both had no significant effect on soil respiration,however,they aggravated and reduced the flood damage in reed plants,respectively. The net photosynthetic rate of P. australis was from high to low as the decreased precipitation > CK > increased precipitation.
中文摘要滨海湿地地下水位浅,淡咸水垂直交互作用明显,全球气候变化背景下降水变异改变其土壤表层水盐状况,从而影响植物光合作用与土壤呼吸.为探究降雨量变化对黄河三角洲滨海湿地土壤呼吸和光合特性的影响,采用固定式遮雨顶棚和雨水输送管道相结合的方法设置增减雨处理小区,于2015年生长季测定土壤呼吸和光合作用光响应曲线,同时连续测定土壤温度、土壤含水量、土壤含盐量等土壤环境因子.结果表明:根据土壤含水量波动情况可将生长季分为3个阶段:干旱期、湿润期、淹水期.不同土壤水分阶段,土壤呼吸和芦苇光合特性对降雨量增减的响应不同.在干旱期,增雨处理下土壤呼吸速率显著提高了31.8%,同时芦苇叶片气孔导度和光合能力显著增强;减雨处理下土壤呼吸速率降低41.1%,芦苇叶片气孔阻塞,光合能力降低.在湿润期,增雨和减雨处理使土壤呼吸速率及其温度敏感性指数(Q10)均出现下降,但二者未对芦苇各光合参数和净光合速率产生显著影响.在淹水期,增减雨处理未对土壤呼吸产生显著影响,但芦苇对淹水胁迫较为敏感,增减雨分别加重和降低了淹水对芦苇植株的伤害,光合速率由高到低为减雨>对照>增雨.
文章类型Article
收录类别CSCD
语种中文
关键词[WOS]Plant Sciences
研究领域[WOS]Plant Sciences; 植物科学
CSCD记录号CSCD:6069939
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/24283
专题中科院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
中科院海岸带环境过程与生态修复重点实验室
作者单位1.聊城大学环境与规划学院;
2.中国科学院烟台海岸带研究所中国科学院海岸带环境过程与生态修复重点实验室;
3.山东省黄河三角洲国家级自然保护区
推荐引用方式
GB/T 7714陈亮,孙宝玉,韩广轩,等. 降雨量增减对黄河三角洲滨海湿地土壤呼吸和芦苇光合特性的影响[J]. 应用生态学报,2017,28(9):2794-2804.
APA陈亮.,孙宝玉.,韩广轩.,刘子亭.,贺文君.,...&吴立新.(2017).降雨量增减对黄河三角洲滨海湿地土壤呼吸和芦苇光合特性的影响.应用生态学报,28(9),2794-2804.
MLA陈亮,et al."降雨量增减对黄河三角洲滨海湿地土壤呼吸和芦苇光合特性的影响".应用生态学报 28.9(2017):2794-2804.
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