干旱区生态环境知识资源中心(Arid): 内蒙古西鄂尔多斯荒漠区降水入渗氘同位素特征

Arid

	内蒙古西鄂尔多斯荒漠区降水入渗氘同位素特征
其他题名	Deuterium isotope characteristics of precipitation infiltrated in the West Ordos Desert of Inner Mongolia,China
	陈婕; 徐庆; 高德强; 马迎宾; 张蓓蓓; 郝玉光
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2017
卷号	28 期号:7 页码:2207-2214
中文摘要	探讨我国干旱半干旱地区大气降水在土壤剖面中的时空分布特征将为西鄂尔多斯荒漠退化生态系统恢复和维持提供科学依据.本研究利用氘同位素技术研究了内蒙古西鄂尔多斯荒漠的大气降水、土壤水、地下水中的氘同位素值(deltaD),运用二元线性混合模型计算降水对各层土壤水的贡献率,并结合土壤含水量分析了不同降水条件下土壤剖面各层土壤水 deltaD的时空分布特征.结果表明:雨后9 d内,小雨(0 ~ 10 mm)影响0 ~ 10 cm土壤含水量和土壤水deltaD值,对表层土壤(0 ~ 10 cm)的贡献率在30.3% ~ 87.9%;中雨(10 ~ 20 mm)影响0 ~ 40 cm土壤含水量和土壤水deltaD值,对0 ~ 40 cm土壤水的贡献率为28.2%~80.8%;大雨(20 ~ 30 mm)和特大暴雨(> 30 mm)影响0 ~ 100 cm土壤含水量和土壤水deltaD值.降水对100 ~ 150 cm深层土壤水deltaD值影响不显著.西鄂尔多斯荒漠土壤水deltaD介于大气降水deltaD与地下水 deltaD之间,表明西鄂尔多斯荒漠土壤水主要来源于大气降水与地下水.在同一降水强度下,表层土壤水(0~10 cm)受降水的直接影响显著,随着土壤深度的增加,土壤水deltaD变化幅度降低, 100~150 cm深层土壤水deltaD基本趋于稳定.降水强度越大,对土壤水deltaD影响的时间越长,影响的土壤深度也越深.
英文摘要	Understanding the soil-profile temporal and spatial distribution of rainwater in arid and semiarid regions provides a scientific basis for the restoration and maintenance of degraded desert ecosystems in the West Ordos Desert of Inner Mongolia,China. In this study,the deuterium isotope (deltaD) value of rainwater,soil water,and groundwater were examined in the West Ordos Desert. The contribution of precipitation to soil water in each layer of the soil profile was calculated with two-end linear mixed model. In addition,the temporal and spatial distribution of deltaD of soil water in the soil profile was analyzed under different-intensity precipitation. The results showed that small rainfall events (0-10 mm) affected the soil moisture and the deltaD value of soil water in surface soil (0- 10 cm). About 30.3% to 87.9% of rainwater was kept in surface soil for nine days following the rainfall event. Medium rainfall events (10-20 mm) influenced the soil moisture and the deltaD value of soil water at soil depth of 0-40 cm. About 28.2% to 80.8% of rainwater was kept in soil layer of 0-40 cm for nine days following the medium rainfall event. Large (20-30 mm) and extremely large (>30 mm) rainfall events considerably influenced the soil moisture and deltaD value of soil water in each of the soil layers,except for the 100-150 cm layer. The deltaD value of soil water was between those deltaD values of rainwater and groundwater,which suggested that precipitation and groundwater were the sources of soil water in the West Ordos Desert. Under the same intensity rainfall,the deltaD value of surface soil water (0-10 cm) was directly affected by deltaD of rainwater. With increasing soil depth,the variation of soil water deltaD decreased,and the soil water of 100-150 cm kept stable. With increasing intensity of precipitation,the influence of precipitation on soil water deltaD lasted for a longer duration and occurred at a deeper soil depth.
中文关键词	氘同位素 ; 土壤水 ; 降水 ; 西鄂尔多斯荒漠
英文关键词	deuterium isotope soil water precipitation West Ordos Desert
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:6030557
来源机构	中国林业科学研究院沙漠林业实验中心
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236911
作者单位	陈婕, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 徐庆, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 高德强, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 马迎宾, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 张蓓蓓, 中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国.; 郝玉光, 中国林业科学研究院沙漠林业实验中心, 磴口, 内蒙古 015200, 中国.
推荐引用方式 GB/T 7714	陈婕,徐庆,高德强,等. 内蒙古西鄂尔多斯荒漠区降水入渗氘同位素特征[J]. 中国林业科学研究院沙漠林业实验中心,2017,28(7):2207-2214.
APA	陈婕,徐庆,高德强,马迎宾,张蓓蓓,&郝玉光.(2017).内蒙古西鄂尔多斯荒漠区降水入渗氘同位素特征.应用生态学报,28(7),2207-2214.
MLA	陈婕,et al."内蒙古西鄂尔多斯荒漠区降水入渗氘同位素特征".应用生态学报 28.7(2017):2207-2214.