干旱区生态环境知识资源中心(Arid): 盐生荒漠土壤水稳定氢、氧同位素组成季节动态

Arid

	盐生荒漠土壤水稳定氢、氧同位素组成季节动态
其他题名	Analysis on Seasonal Dynamics of delta~(18)O and deltaD in Soil Water at a Saline Desert Site in the Southeastern Junggar Basin
	周海; 郑新军; 唐立松; 李彦
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2014
卷号	34 期号:1 页码:162-169
中文摘要	对准噶尔盆地东南缘降水和土壤水稳定氢、氧同位素组成(delta~(18)O和deltaD)进行了测定,分析了降水中delta~(18)O和deltaD值的季节变化规律、表层土壤水中delta~(18)和deltaD值对降水脉冲的动态响应以及不同深度土壤水中delta~(18)和deltaD值的变化特征。结果表明:该区域大气降水线为deltaD=7.691delta~(18)O+4. 606;降水与表层土壤水中delta~(18)O和deltaD值表现出明显的季节变化特征;表层土壤水中delta~(18)O和deltaD值、质量含水量对降水脉冲响应显著,且不同量级的降水导致不同程度的响应。利用LSD法对0~300 cm土层内土壤水中delta~(18)O和deltaD值进行多重比较分析,可将土壤在垂直方向上分为3层,表层(0~50 cm)土壤水分活跃,稳定同位素值随深度的增加而迅速减小;中间层(50~180 cm)土壤水分相对活跃,既受到降水入渗和蒸发作用的影响,也有地下水的补给;深层(180~300 cm)水分来源稳定,土壤水中delta~(18)O和deltaD值基本不变。
英文摘要	delta~(18)O and deltaD in precipitation and soil water were measured at a saline desert site in the southeastern Junggar Basin, China, during the growing season in 2012. The seasonal dynamic of delta~(18)O and deltaD in precipitation, topsoil water isotope response to pulse rainfall events and profile characteristic of soil water delta~(18)O and deltaD were analyzed. The results showed that the equation off the local meteoric water line (LMWL) was deltaD=7. 691 delta180+4. 606, the values of delta~(18)O and deltaD in precipitation and topsoil water had obvious seasonal fluctuations. The surface soil water isotope and content responded significantly to pulse rainfall and different magnitudes of precipitation could trigger different degrees of response. Through LSD’s multiple comparison, we distinguished three layers in soil profile of 0 300 cm. The upper layer (0-50 cm) had the most active soil moisture and the values of delta~(18)O and deltaD reduced quickly with the depth. The middle layer (50-180 cm) had the relatively active soil moisture with stable isotope values which were influenced not only by precipitation infiltration and soil evaporation, but also by groundwater recharge. The lower layer (180-300 cm) had quasi-stable soil water content, the values of delta~(18)O and deltaD were related to the stable shallow groundwater water.
中文关键词	准噶尔盆地 ; 土壤水分 ; 稳定氢、氧同位素 ; 降水脉冲
英文关键词	Junggar Basin soil water delta~(18)O and deltaD pulse precipitation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5049247
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232144
作者单位	中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室;;新疆阜康荒漠生态系统国家野外科学观测研究站, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	周海,郑新军,唐立松,等. 盐生荒漠土壤水稳定氢、氧同位素组成季节动态[J]. 中国科学院新疆生态与地理研究所,2014,34(1):162-169.
APA	周海,郑新军,唐立松,&李彦.(2014).盐生荒漠土壤水稳定氢、氧同位素组成季节动态.中国沙漠,34(1),162-169.
MLA	周海,et al."盐生荒漠土壤水稳定氢、氧同位素组成季节动态".中国沙漠 34.1(2014):162-169.