干旱区生态环境知识资源中心(Arid): 植被恢复对库布齐沙漠非生长季土壤CH

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	植被恢复对库布齐沙漠非生长季土壤CH_4、N2 O通量的影响
其他题名	Effects of revegetation on soil effluxes of CH_4 and N_2O in non-growing season in Hobq Desert,China
	王博; 段玉玺; 王伟峰; 李晓晶; 刘宗奇; 刘源
来源期刊	生态学报
ISSN	1000-0933
出版年	2020
卷号	40 期号:6 页码:2028-2038
中文摘要	荒漠土壤温室气体排放是陆地碳氮循环的重要组成部分,目前人工建植促进植被恢复对非生长季荒漠土壤CH_4、N_2O通量的影响尚不明确。本研究采用静态暗箱-气相色谱和时空替代法,分析非生长季库布齐沙漠东部不同植被恢复阶段土壤CH_4、N_2O通量特征及其与环境因子之间的关系,探讨植被恢复对非生长季荒漠土壤温室气体排放的影响。结果表明:非生长季荒漠土壤是CH_4的吸收汇,也是N_2O的排放源。不同植被恢复阶段CH_4平均吸收量和N_2O排放量均表现为:苔藓结皮固定沙地(47.6 mug CH_4 m~(-2) h~(-1),13.5 mug N_2O m~(-2) h~(-1)) >地衣结皮固定沙地(32.2 mug CH_4 m~(-2) h~(-1),9.1 mug N_2O m~(-2) h~(-1)) >藻结皮固定沙地(23.7 mug CH_4 m~(-2) h~(-1),8.7 mug N_2O m~(-2) h~(-1)) >半固定沙地(22.4 mug CH_4 m~(-2) h~(-1),5.0 mug N_2O m~(-2) h~(-1)) >流动沙地(18.7 mug CH_4 m~(-2) h~(-1),3.9 mug N_2O m~(-2) h~(-1))。荒漠土壤在不同冻结时期温室气体排放存在较大差异,融冻期CH_4吸收贡献率最大,在结冻期N_2O排放贡献率最大。非生长季荒漠土壤存在明显的水热同期现象,土壤水热因子对N_2O通量的影响较小,仅半固定沙地土壤温度与N_2O通量呈显著正相关;而在藻类、地衣和苔藓结皮固定沙地中,土壤温度和含水量均与CH_4通量呈显著负相关。植被恢复过程中,生物量的积累和土壤理化性质的改善,能够显著影响荒漠土壤CH_4、N_2O通量的变化。因此,人工建植促进植被恢复实现沙漠化逆转可改变荒漠生态系统的温室气体排放格局。
英文摘要	Greenhouse gas emission from desert soil is an important part of terrestrial carbon and nitrogen cycle,while the influence of artificial vegetation restoration on CH_4 and N_2O fluxes in desert soil in non-growing seasons is still not clear. In this paper,the static chamber and gas chromatography technique were used. We performed a spatial series analysis that represented at emporalseries to study the desert soil CH_4 and N_2O fluxes corresponding to the different stages of vegetation restoration during non-growing season. We also explored the correlation of these fluxes with the environmental factors and studied the effects of revegetation on desert soil CH_4and N_2O fluxes in the eastern Hobq Desert,China. The results showed that the desert soil was a sink of CH_4 and a contributor to N_2O emission during non-growing season. The change trend for CH_4 and N_2O fluxes at different restoration stages were the same: moss crust fixed sand (47.6 mug CH_4 m~(-2) h~(-1),13.5 mug N_2O m~(-2) h~(-1)) > lichen crust fixed sand (32.2 mug CH_4 m~(-2) h~(-1),9.1 mug N_2O m~(-2) h~(-1)> algae crust fixed sand (23.7 mug CH_4 m~(-2) h~(-1),8.7 mug N_2O m~(-2) h~(-1)) >semi-fixed sand (22.4 mug CH_4 m~(-2) h~(-1),5.0 mug N_2O m~(-2) h~(-1)) >mobile dune (18.7 mug CH_4 m~(-2) h~(-1),3.9 mug N_2O m~(-2) h~(-1)). The greenhouse gas emissions of desert soil in different freezing periods were significantly different. The CH_4 absorption contribution rate was the largest in thawing period,while the N_2O emission contribution rate was the largest in freezing period. During the non-growing season,there was an obvious hydrothermal synchronization in desert soil. The soil hydrothermal factors had little effect on the N_2O flux. Only the soil temperature in semi-fixed sandy land had a significant positive correlation with the N_2O flux. But in algae,lichen and moss crust fixed sands,soil temperature and moisture content were all negatively correlated with the CH_4 flux. In the process of vegetation restoration,the accumulation of biomass and the improvement of soil physical and chemical properties could significantly affect the changes of CH_4 and N_2O fluxes in desert soil. Therefore,the artificial vegetation restoration and desertification reversal could alter the pattern of greenhouse gas emissions in desert ecosystem.
中文关键词	荒漠生态系统 ; 非生长季 ; 冻融期 ; 植被恢复 ; 温室气体
英文关键词	desert ecosystem non-growing season thawing period revegetation greenhouse gas
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:6705743
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336390
作者单位	王博, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.; 段玉玺, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.; 王伟峰, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.; 李晓晶, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.; 刘宗奇, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.; 刘源, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.
推荐引用方式 GB/T 7714	王博,段玉玺,王伟峰,等. 植被恢复对库布齐沙漠非生长季土壤CH_4、N2 O通量的影响[J],2020,40(6):2028-2038.
APA	王博,段玉玺,王伟峰,李晓晶,刘宗奇,&刘源.(2020).植被恢复对库布齐沙漠非生长季土壤CH_4、N2 O通量的影响.生态学报,40(6),2028-2038.
MLA	王博,et al."植被恢复对库布齐沙漠非生长季土壤CH_4、N2 O通量的影响".生态学报 40.6(2020):2028-2038.