兰州大学机构库 >草地农业科技学院
Water use patterns differed notably with season and slope aspect for Caragana korshinskii on the Loess Plateau of China
Chen, Zhixue1,2,3; Wang, Guohui1,2,3; Pan, YH(潘燕辉)4; Yang, XL(杨宪龙)1,2,3; Shen, YY(沈禹颖)1,2,3
2021-03
Source PublicationCATENA
ISSN0341-8162
Volume198
AbstractFlexible water use patterns are of great importance for the survival of vegetation in dryland regions. Our study aimed to investigate the influences of season and slope aspect on the water use patterns of Caragana korshinskii on typical shady and sunny slopes on the Loess Plateau in China. We collected xylem water, soil water from the 0-200 cm soil layers, and precipitation in May, July, September and November 2018 and measured their hydrogen (delta D) and oxygen (delta O-18) isotope compositions. The root distribution of C. korshinskii in the 0-200 cm soil layer on both slopes was also investigated. The 0-20, 20-80, and 80-200 cm soil layers were identified as three potential water sources for C. korshinskii, and their proportional contributions to the plant water supply were calculated using a linear mixed model. The results showed that C. korshinskii on the sunny slope absorbed 89.3% of their water from the 0-20 cm soil layer in May but mainly utilized water from the 0-20 and 20-80 cm soil layers in both July and September, and the total contribution percentages of these layers were 84.5% and 89.2%, respectively. However, C. korshinskii on the shady slope extracted water evenly from all three soil layers in May. Thereafter, the plants absorbed water from the 20-80 and 80-200 cm soil layers in both July and September, and the total contribution percentages of these layers were 96% and 91.8%, respectively. In November, C. korshinskii absorbed 84.8% and 78% of their water from the 80-200 cm soil layer on the shady and sunny slopes, respectively. The generally shallower soil water use of C. korshinskii on the sunny slope than on the shady slope may be due to the larger fine-root (d < 2 mm) length density in the 0-80 cm soil layer on the sunny slope (1.12 +/- 0.28 mm/cm(3)) than on the shady slope (0.57 +/- 0.16 mm/mm(3)) (P < 05). This study indicates that C. korshinskii on both shady and sunny slopes seasonally switched their water sources from different soil water layers during the growing season. However, due to their reliance on soil water at the 0-20 cm depth, which is supplied by unstable rainfall, C. korshinskii on sunny slopes may be more vulnerable to future climatic warming and drying on the Loess Plateau. Our findings provide valuable information related to optimal water management in the afforested shrublands in this region.
KeywordStable isotopes Water use patterns IsoSource model Plantation The Loess Plateau
PublisherELSEVIER
DOI10.1016/j.catena.2020.105028
Indexed BySCOPUS ; SCIE
Language英语
WOS Research AreaGeology ; Agriculture ; Water Resources
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000605337000062
Citation statistics
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/449503
Collection草地农业科技学院
资源环境学院
Corresponding AuthorYang, Xianlong; Shen, Yuying
Affiliation1.Lanzhou Univ, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Peoples R China;
2.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou 730020, Peoples R China;
3.Lanzhou Univ, Key Lab Grassland Livestock Ind Innovat, Minist Agr & Rural Affairs, Lanzhou 730020, Peoples R China;
4.Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China
First Author AffilicationCollege of Pastoral Agriculture Science and Technology
Corresponding Author AffilicationCollege of Pastoral Agriculture Science and Technology
Recommended Citation
GB/T 7714
Chen, Zhixue,Wang, Guohui,Pan, Yanhui,et al. Water use patterns differed notably with season and slope aspect for Caragana korshinskii on the Loess Plateau of China[J]. CATENA,2021,198.
APA Chen, Zhixue,Wang, Guohui,Pan, Yanhui,Yang, Xianlong,&Shen, Yuying.(2021).Water use patterns differed notably with season and slope aspect for Caragana korshinskii on the Loess Plateau of China.CATENA,198.
MLA Chen, Zhixue,et al."Water use patterns differed notably with season and slope aspect for Caragana korshinskii on the Loess Plateau of China".CATENA 198(2021).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Altmetrics Score
Google Scholar
Similar articles in Google Scholar
[Chen, Zhixue]'s Articles
[Wang, Guohui]'s Articles
[Pan, Yanhui]'s Articles
Baidu academic
Similar articles in Baidu academic
[Chen, Zhixue]'s Articles
[Wang, Guohui]'s Articles
[Pan, Yanhui]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Chen, Zhixue]'s Articles
[Wang, Guohui]'s Articles
[Pan, Yanhui]'s Articles
Terms of Use
No data!
Social Bookmark/Share
No comment.
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.