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当前位置: 首页 > 文章 > 艾比湖地区土壤呼吸测定代表性时段 生态学杂志 2013,32 (11) 3109-3116
Position: Home > Articles > Representative time periods for measuring daily soil respiration in Ebinur Lake area,Xinjiang of Northwest China Chinese Journal of Ecology 2013,32 (11) 3109-3116

艾比湖地区土壤呼吸测定代表性时段

作  者：
秦璐;吕光辉;何学敏;杨建军;何静;张燕
单  位：
新疆绿洲生态教育部重点实验室
关键词：
干旱区;土壤呼吸;冻结期;冻融期;生长期;碳通量
摘  要：
在日尺度上选取合适的时间段测定土壤呼吸,取其均值代表日均值,可使短期土壤呼吸观测数据有效应用于年尺度土壤呼吸总量的估算。利用2007—2012年艾比湖地区不同植被类型的土壤呼吸速率昼夜观测数据(共64 d),选择了土壤呼吸代表性时段,并对其有效性进行评估。结果表明:冻结期、冻融期和生长期土壤呼吸代表性时段分别为9:00—13:00、12:00—16:00和8:00—12:00;冻结期土壤呼吸代表性时段平均值与24 h日平均值差异为0.030μmol·m-2·s-1,冻融期为0.004μmol·m-2·s-1,生长期为0.039μmol·m-2·s-1,相对差异性分别为1.94%、0.86%和1.76%。选择的代表性时段土壤呼吸累加至年尺度可代表研究区的年碳通量(R2=0.972)。研究结果可为温带干旱区土壤呼吸测定时间的选择提供数据支持,为客观评价干旱区土壤呼吸提供理论依据。
译  名：
Representative time periods for measuring daily soil respiration in Ebinur Lake area,Xinjiang of Northwest China
作  者：
QIN Lu;L Guang-hui;HE Xue-min;YANG Jianjun;HE Jing;ZHANG Yan;Xinjiang Key Laboratory of Oasis Ecology;College of Resources and Environmental Science,Xinjiang University;
关键词：
arid area;;soil respiration;;freezing period;;thawing period;;growth period;;carbon flux.
摘  要：
To select proper time periods at daily scale to measure soil respiration and take the measured average value to represent the daily average soil respiration can make the short-term observed data be effectively applied in the estimation of soil respiration at yearly scale. By using 64-days diurnal observation data of soil respiration rate( R s) under different vegetation types in Ebinur Lake area in 2007- 2012,the representative time periods for measuring the R s were selected,and the effectiveness was estimated. The selected representative time periods for measuring the R s in freezing period,thawing period,and growth period were 9:00- 13:00,12:00-16:00,and 8:00- 12:00,respectively. The differences between the average R s values of representative time periods and of 24 hours in freezing period,thawing period,and growth period were0. 030,0. 004,and 0. 039 μmol · m- 2·s- 1,and the relative differences were 1. 94%,0.86%,and 1. 76%,respectively. Overlaying the R s in representative time periods to yearly scale could represent the yearly soil carbon flux in Ebinur Lake area( R2= 0. 972). Our results could provide data support for the selection of the measurement time periods of soil respiration in temperate arid area,and also,provide theoretical basis for the objective evaluation of soil respiration in arid area.

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