气候变化领域集成服务门户(CCPortal): Soil macroporosity and water flow in the root zone of oases in hyper-arid regions

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DOI	10.1111/ejss.13235
	Soil macroporosity and water flow in the root zone of oases in hyper-arid regions
	Zhang, Yongyong; Jia, Angyuan; Zhao, Wenzhi; Kang, Jianjun; Wang, Chuan; Kang, Wenrong; Tian, Zihan
通讯作者	Zhang, YY (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Line Inland River Basin Res Stn, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	1351-0754
EISSN	1365-2389
卷号	73 期号:2
英文摘要	The characteristics of soil macropores and water infiltration are closely connected to the growth of plant roots and their root zone environment. However, it is unclear how the root zone environment of oasis farmlands regulates the development of soil macropores and water flow in hyper-arid regions. The objective of this study was to investigate soil macropores and their effect on water flow under irrigated oasis farmlands using a combination of X-ray computed tomography (CT) and dye tracer. It was hypothesized that the integration of CT and dye tracer could clearly reveal preferential flow through biopores and large pores of oasis soils. A helical medical CT scanner was used to quantify more information about soil macropores in the root zone, along with an in situ single-ring dye infiltration experiment to reveal water flow in three different oasis farmlands (piedmont oasis farmland, marginal oasis farmland, and old oasis farmland). Soil macroporosity was 0.44% under crop rows, while soil macroporosity in the interrows was only 0.30% across the oasis farmlands. Biopores contributed 73% of the volume of the total macropores under crop rows. The stable infiltration rate in the interrows was 0.3 mm min(-1), which was significantly (p < 0.05) less than that under crop rows (0.7 mm min(-1)). Water flow under crop rows were mainly transported in biopores and large pores. The contribution of macropores to preferential flow under crop rows was 4.8 times larger than interrows. The integration of CT and dye tracer was a more holistic technique, which adequately revealed that oases had preferential flow affected by biopores and large pores, resulting in higher solute and contaminant transport. Key Points Soil macropores and preferential flow affected by crop roots were investigated in hyper-arid regions. The integration of CT and dye tracer adequately identified preferential flowpaths of oasis soils. Biopores were larger under crop rows than interrows. Preferential flow transported in biopores and large soil pores under crop rows.
关键词	DESERT-OASIS ECOTONE PREFERENTIAL FLOW IMAGE-ANALYSIS INFILTRATION INFILTRABILITY TRANSPORT PATTERNS TREES
英文关键词	dye tracer; preferential flow; soil structure; water infiltration; X-ray tomography
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:000780464500001
来源期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253865
作者单位	[Zhang, Yongyong; Zhao, Wenzhi; Kang, Jianjun; Wang, Chuan; Kang, Wenrong; Tian, Zihan] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Line Inland River Basin Res Stn, Lanzhou 730000, Peoples R China; [Zhang, Yongyong; Zhao, Wenzhi; Kang, Jianjun; Wang, Chuan; Kang, Wenrong; Tian, Zihan] Univ Chinese Acad Sci, Beijing, Peoples R China; [Jia, Angyuan] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Qual Arable Land, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yongyong,Jia, Angyuan,Zhao, Wenzhi,et al. Soil macroporosity and water flow in the root zone of oases in hyper-arid regions[J]. 中国科学院西北生态环境资源研究院,2022,73(2).
APA	Zhang, Yongyong.,Jia, Angyuan.,Zhao, Wenzhi.,Kang, Jianjun.,Wang, Chuan.,...&Tian, Zihan.(2022).Soil macroporosity and water flow in the root zone of oases in hyper-arid regions.EUROPEAN JOURNAL OF SOIL SCIENCE,73(2).
MLA	Zhang, Yongyong,et al."Soil macroporosity and water flow in the root zone of oases in hyper-arid regions".EUROPEAN JOURNAL OF SOIL SCIENCE 73.2(2022).