干旱区生态环境知识资源中心(Arid): 两类典型荒漠生物结皮覆盖土壤碳通量月变化特征及其影响因子

Arid

	两类典型荒漠生物结皮覆盖土壤碳通量月变化特征及其影响因子
其他题名	Monthly Variation Characteristics and Key Influencing Factors of Carbon Fluxes in Two Typical Desert Crusts
	韦应欣; 周利军; 卜崇峰; 骆汉; 鞠孟辰; 王春; 李亚红; 郭琦; 李炳垠
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2021
卷号	28 期号:6 页码:153-161
中文摘要	为明确荒漠生态系统生物结皮覆盖土壤碳通量的月变化特征及其关键影响因子,以裸沙作为对照,原位动态(生长期,6-11月)观测毛乌素沙地藓结皮(M)、藻结皮(AL)覆盖土壤的呼吸速率(DR)和净碳通量(NCF),并计算得到光合速率(Pn),同步记录相应环境指标数据。结果表明:(1)两类结皮DR与Pn均先升后降,DR在8月达峰值[M,AL分别为1.96,1.66mumol/(m~2·s)],Pn在9月达峰值[M,AL分别为2.75,1.39mumol/(m~2·s)];NCF先升后降再升,7月达峰值[M,AL分别为1.38,1.43mumol/(m~2·s)],9月达谷值[M,AL分别为-1.24,-0.18mumol/(m~2·s)]。(2)2,5,10cm土壤温度与2,5cm土壤含水量是藓结皮覆盖土壤碳通量关键影响因子,2,5,10cm土壤温度、光照强度、近地表空气湿度是影响藻结皮覆盖土壤碳通量的关键影响因子。(3)藓结皮净碳固定土壤水分阈值(8.9%)低于藻结皮(11.4%),温度阈值(13.5℃)高于藻结皮(7.3℃)。以上结果表明,藓结皮与藻结皮覆盖土壤碳通量的月变化相似,但关键影响因子不同,在未来气候变化引起的增温减雨的背景下,藻结皮碳损失风险高于藓结皮。
英文摘要	In order to clarify the characteristics of monthly changes in carbon fluxes of soil covered with biological crust in desert ecosystem and its key influencing factors,the respiration rates(DR)and net carbon fluxes(NCF)of soils covered with moss crust(M),algal crust(AL)and bare land set as the control were observed in situ dynamically(during the growing period,June-November)in Mu Us Sandy Land,and the photosynthetic rate(Pn)was calculated.The corresponding environmental index data were recorded simultaneously.The results showed that:(1)DR and Pn of both types of crusts first increased and then decreased,with DR peaking in August[1.96,1.66mumol/(m~2·s)for M and AL,respectively];and with Pn peaking in September 2.75,1.39mumol/(m~2·s)for M and AL,respectively];NCF first increased,then decreased and increased later,with peaking in July[1.38,1.43mumol/(m~2·s)for M and AL,respectively],and reached a trough value in September[-1.24,-0.18mumol/(m~2·s)for M and AL,respectively];(2)temperatures of soil depths of 2cm,5cm and 10cm and soil water contents of soil depths of 2cm and 5cm were the key influencing factors on moss crust cover soil carbon flux,temperatures of soil depths of 2cm,5cm and 10 cm,light intensity and near-surface air humidity were the key influencing factors on algal crust cover soil carbon flux;(3)the soil moisture threshold of net carbon fixation by moss crust(8.9%)was lower than that of algal crust(11.4%),and the temperature threshold(13.5℃)was higher than that of algal crust(7.3℃).The above results indicated that the monthly changes of carbon fluxes of soils covered by moss crust and algal crust were similar,but the key influencing factors were different,and the risk of carbon loss in algal crust was higher than that in moss crust in the context of warming and rainfall reduction caused by future climate change.
中文关键词	毛乌素沙地 ; 藓结皮 ; 藻结皮 ; 土壤碳通量 ; 月变化特征 ; 环境因子
英文关键词	Mu Us Sandy Land moss crust algal crust soil carbon flux monthly variation characteristics environmental factors
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7111314
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377948
作者单位	韦应欣, 西北农林科技大学水土保持研究所;;中国科学院水利部水土保持研究所, ;;, 杨凌;;杨凌, 陕西;;陕西 712100;;712100, 中国.; 卜崇峰, 西北农林科技大学水土保持研究所;;中国科学院水利部水土保持研究所, ;;, 杨凌;;杨凌, 陕西;;陕西 712100;;712100, 中国.; 骆汉, 西北农林科技大学水土保持研究所;;中国科学院水利部水土保持研究所, ;;, 杨凌;;杨凌, 陕西;;陕西 712100;;712100, 中国.; 周利军, 长江水利委员会长江流域水土保持监测中心站, 武汉, 湖北 430010, 中国.; 鞠孟辰, 西北农林科技大学水土保持研究所, 杨凌, 陕西 712100, 中国.; 王春, 西北农林科技大学水土保持研究所, 杨凌, 陕西 712100, 中国.; 李亚红, 西北农林科技大学水土保持研究所, 杨凌, 陕西 712100, 中国.; 郭琦, 西北农林科技大学水土保持研究所, 杨凌, 陕西 712100, 中国.; 李炳垠, 黄河水利委员会黄河上中游管理局, 西安, 陕西 710021, 中国.
推荐引用方式 GB/T 7714	韦应欣,周利军,卜崇峰,等. 两类典型荒漠生物结皮覆盖土壤碳通量月变化特征及其影响因子[J],2021,28(6):153-161.
APA	韦应欣.,周利军.,卜崇峰.,骆汉.,鞠孟辰.,...&李炳垠.(2021).两类典型荒漠生物结皮覆盖土壤碳通量月变化特征及其影响因子.水土保持研究,28(6),153-161.
MLA	韦应欣,et al."两类典型荒漠生物结皮覆盖土壤碳通量月变化特征及其影响因子".水土保持研究 28.6(2021):153-161.