| 王金龙,李艳红,李发东.博斯腾湖人工和天然芦苇湿地土壤呼吸动态变化规律及其影响因素[J].农业环境科学学报,2017,36(1):167-175. |
| 博斯腾湖人工和天然芦苇湿地土壤呼吸动态变化规律及其影响因素 |
| Dynamics of soil respiration and its influential factors on artificial and natural reed wetlands in Boston Lake |
| 投稿时间：2016-05-31 |
| DOI：10.11654/jaes.2016-0744 |
| 中文关键词: 淡水湖泊湿地 土壤呼吸 动态变化 博斯腾湖 |
| 英文关键词: freshwater lake wetland soil respiration dynamic change Boston Lake |
| 基金项目:新疆维吾尔自治区重点实验室专项基金项目（XJDX0909-2014-05）；新疆师范大学地理学博士点支撑学科项目（XJNU-DL-201613）；天山学者计划项目 |
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| 中文摘要: |
| 为研究干旱区淡水湖泊湿地土壤呼吸作用的动态变化及其影响因素，以博斯腾湖人工和天然芦苇（Phragmites australis）湿地为样地，于2014年11月-2015年9月，利用LI-840A土壤碳通量自动测定仪对土壤呼吸的日变化和季节动态进行了监测。结果表明：人工、天然芦苇湿地土壤呼吸速率的日变化表现为明显的单峰曲线，且呈现出一定的波动性；两种芦苇湿地土壤呼吸速率均具有明显的季节变化特征，生长旺盛期（7-8月）的土壤呼吸作用最强，越冬期（11月）土壤呼吸作用最弱；博斯腾湖芦苇湿地土壤呼吸速率为正值，且人工芦苇湿地土壤呼吸速率高于天然芦苇湿地；5 cm深土壤温度、近地表温度和空气相对湿度是土壤呼吸速率的主要影响因素；人工、天然芦苇湿地土壤呼吸速率均与土壤pH和盐分呈负相关，而与土壤有机碳呈正相关。 |
| 英文摘要: |
| Soil respiration from the surrounding wetland of a lake plays an important role in assessing soil carbon cycle and soil microbial metabolism in inland water ecosystem. In order to understand the dynamics of soil respiration in wetlands of artificial and natural reed(Phragmites australis), field observations were conducted from November 2014 to September 2015 by using LI-840A automated soil CO2 flux system in Bosten Lake located in arid areas of Western China. During monitoring periods, environmental variables(such as soil moisture, soil temperature, air moisture, air temperature) were also observed to determine the effects of abiotic factors on soil respiration in these two wetland ecosystems. Results showed that soil respiration existed obvious diurnal and seasonal patterns. The diurnal curve of the soil respiration was unimodal,with the peak appeared at 15:00. The seasonal change of soil respiration showed that the maximum values were occurred in July and August and the minimum values were in November, respectively. However, soil respiration rate for the artificial reed was greater than that for the natural reed(P<0.05). The soil respiration rate was mainly affected by the factors of ground ambient air temperature, ground air humidity and soil temperature at 5 cm depth. Soil organic carbon was positively correlated with soil respiration rate in both the artificial and natural reed, however, negatively with soil pH and soil salt. |
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