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

发布时间：2018-05-16 22:29

本文选题：淡水湖泊湿地 + 土壤呼吸　；参考：《农业环境科学学报》2017年01期

【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p H和盐分呈负相关,而与土壤有机碳呈正相关。
[Abstract]:In order to study the dynamic changes of soil respiration in freshwater lake wetland in arid area and its influencing factors, Phragmites australis wetland of Bosten Lake was used as a sample site from November 2014 to September 2015. The diurnal variation and seasonal dynamics of soil respiration were monitored by LI-840A automatic measuring instrument of soil carbon flux. The results showed that the diurnal variation of soil respiration rate in artificial and natural Reed wetland showed an obvious single peak curve, and showed certain fluctuation, and the soil respiration rate of two Reed wetlands had obvious seasonal variation characteristics. The respiration rate of Reed wetland in Bosten Lake was positive, the respiration rate of soil was the strongest in the growing period (July-August), and that in the winter period (November) was the weakest. The soil respiration rate in the artificial Reed wetland was higher than that in the natural Reed wetland at a depth of 5 cm, and the near surface temperature and air relative humidity were the main factors affecting the soil respiration rate. Soil respiration rate in natural Reed wetland was negatively correlated with soil pH and salinity, but positively correlated with soil organic carbon.
【作者单位】：新疆维吾尔自治区重点实验室"新疆干旱区湖泊环境与资源实验室";新疆师范大学地理科学与旅游学院;中国科学院地理科学与资源研究所;中国科学院大学;
【基金】：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~~
【分类号】：S154

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