干旱区生态环境知识资源中心(Arid): 不同水分条件下宁夏枸杞氢氧稳定同位素变化特征试验研究

Arid

	不同水分条件下宁夏枸杞氢氧稳定同位素变化特征试验研究
其他题名	Experiment on variation characteristics of hydrogen and oxygen stable isotopes of Lycium barbarum in Ningxia under different irrigation conditions
	汤英; 徐利岗; 王怀博; 鲍子云
来源期刊	排灌机械工程学报
ISSN	1674-8530
出版年	2020
卷号	38 期号:3 页码:304-309
中文摘要	以宁夏枸杞为研究对象,采取试验区降水、不同灌溉量下枸杞根区土壤水、根系及茎秆样品并测定其氢氧稳定性同位素比率delta~(18)O和deltaD,分析不同降水量及灌溉量下枸杞稳定同位素的变化特征,利用IsoSource模型计算了枸杞对各潜在水源的可能利用比例.结果表明:试验区降水中deltaD和delta~(18)O之间有很好的线性关系,并得出了当地大气降水线的回归方程;不同灌溉量,枸杞主根系层(20~60 cm)的土壤含水率和与其对应的deltaD呈负相关趋势变化,随着土层深度加深, deltaD减小;降水量不同时,各土层deltaD变化规律相似,5 mm以下20 cm处的deltaD最大(-64.39), 枸杞主要利用表层(0 ~ 20 cm)及部分中层(20 ~ 40 cm)的土壤水,分别占35.2%及25.1%;降水量为13.9 mm时,20~60 cm处deltaD相对较丰,为-65.20以上,枸杞可利用0~60 cm土层土壤含水量: 0~20,20~40,40 ~ 60 cm土层的土壤水利用量分别占比22.4%,25.3%及23.2%.结论可为干旱区枸杞科学灌溉提供有益借鉴.
英文摘要	Considering the Lycium barbarum in Ningxia as research object,the rainfall data,root system and stem sample of the Lycium barbarum under different irrigation quotas and precipitations in the experiment filed were collected,then the delta~(18)O and deltaD values were measured to analyze the variation characteristics of stable isotope in the Lycium barbarum. The IsoSource model was used to calculate soil water utilization efficiency of each potential water sources to the Lycium barbarum. The results show that there is a good linear relationship between deltaD and delta~(18)O in precipitation and a line regression equation is built for the meteoric water line in the experimental field. The soil moisture content has a negative correlation with the corresponding deltaD of the Lycium barbarum under different irrigation quotas (20-60 cm), and the deltaD value decreases with deepening soil layer. The variation pattern of deltaD in different soil layers is similar to that in 20 cm below 5 mm precipitation,where the maximum deltaD value is -64.39 . The Lycium barbarum mainly utilizes the water in the surface soil layer (0-20 cm) and middle soil layer (20-40 cm) respectively with utilization efficiencies of 35.2% and 25.1%. The value of deltaD in 20-60 cm is richer (>-65.20 ) when the precipitation is 13.9 mm. The Lycium barbarum can make use of soil water content in 0-60 cm deep soil layer,especially the water utilization efficiencies in 1-20,20-40 and 40-60 cm layers are 22.4%,25.3% and 23.2%,respectively. The conclusion can provide a reference for reasonable irrigation of Lycium barbarum in arid regions.
中文关键词	干旱区 ; 宁夏枸杞 ; 稳定性同位素 ; IsoSource模型 ; 水分来源
英文关键词	arid region Lycium barbarum stable isotope IsoSource model water sources
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6733668
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336530
作者单位	汤英, 宁夏水利科学研究院, 银川, 宁夏 750021, 中国.; 徐利岗, 宁夏水利科学研究院, 银川, 宁夏 750021, 中国.; 王怀博, 宁夏水利科学研究院, 银川, 宁夏 750021, 中国.; 鲍子云, 宁夏水利科学研究院, 银川, 宁夏 750021, 中国.
推荐引用方式 GB/T 7714	汤英,徐利岗,王怀博,等. 不同水分条件下宁夏枸杞氢氧稳定同位素变化特征试验研究[J],2020,38(3):304-309.
APA	汤英,徐利岗,王怀博,&鲍子云.(2020).不同水分条件下宁夏枸杞氢氧稳定同位素变化特征试验研究.排灌机械工程学报,38(3),304-309.
MLA	汤英,et al."不同水分条件下宁夏枸杞氢氧稳定同位素变化特征试验研究".排灌机械工程学报 38.3(2020):304-309.