干旱区生态环境知识资源中心(Arid): Preferential water flow: Influence of alfalfa (Medicago sativa L.) decayed root channels on soil water infiltration

Arid

DOI	10.1016/j.jhydrol.2019.124019
	Preferential water flow: Influence of alfalfa (Medicago sativa L.) decayed root channels on soil water infiltration
	Guo, Lei 1; Liu, Yu 1,2,3; Wu, Gao-Lin 1,2,3,5; Huang, Ze 1; Cui, Zeng 1,2,3; Cheng, Zhen 1; Zhang, Rui-Qi 1; Tian, Fu-Ping 4; He, Honghua 1,2,3
通讯作者	Wu, Gao-Lin
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2019
卷号	578
英文摘要	Soil water infiltration is an important part of the land surface hydrological cycle, and plays an important role in the hydrological response of the soil, such as soil erosion. High infiltration rates favor an increase in the soil water storage capacity that allows maintaining vegetation restoration in arid and semi-arid regions. Alfalfa (Medicago sativa L.) is a quality perennial legume grassland, which is widely planted in semi-arid areas. In this study, the effects of the root channels formed by the decay of alfalfa on preferential flow were evaluated as a driving force to improve soil water infiltration and soil water supply. A double-ring infiltrometer (30-cm inner diameter and 60-cm outer diameter) was used to measure the infiltration process with the falling head method. Methylene blue was used to visualize the pathways followed by the infiltrated water. The results showed that the initial infiltration rate in the alfalfa grassland increased by 27.7%, compared with the control bare land, and the total cumulative infiltration was 1.13 times higher. The steady infiltration rate of the grassland increased by 31.8% compared to the bare land. The root channel diameters were measured with a Vernier caliper, and the average root channel area (RCA) was calculated through the average root channel diameter (ARCD). The values of ARCD and RCA were significantly and positively correlated with the infiltration rates, being the coefficients of determination 0.815 and 0.789, respectively. Our results indicated that root channels formed by the decayed roots of alfalfa played an important role in increasing soil water infiltration and soil water supply under semiarid conditions. Our research improves the understanding of the hydrological cycle processes at the plant-soil interface in semi-arid areas.
英文关键词	Soil water infiltration rate Root channels Double-ring infiltrometer Preferential flow Soil water supply
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000497250200001
WOS关键词	SINGLE-RING ; DYE TRACER ; HYDRAULIC CONDUCTIVITY ; FIELD MEASUREMENT ; LOESS PLATEAU ; FOREST SOIL ; PATTERNS ; MACROPORES ; EROSION ; SYSTEMS
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
EI主题词	2019-11-01
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310634
作者单位	1.Northwest A&F Univ, Coll Nat Resources & Environm, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China; 2.Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; 3.Minist Water Resource, Yangling 712100, Shaanxi, Peoples R China; 4.Chinese Acad Agr Sci, Lanzhou Inst Husb & Pharmaceut Sci, Lanzhou 730050, Gansu, Peoples R China; 5.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Guo, Lei,Liu, Yu,Wu, Gao-Lin,et al. Preferential water flow: Influence of alfalfa (Medicago sativa L.) decayed root channels on soil water infiltration[J]. 西北农林科技大学,2019,578.
APA	Guo, Lei.,Liu, Yu.,Wu, Gao-Lin.,Huang, Ze.,Cui, Zeng.,...&He, Honghua.(2019).Preferential water flow: Influence of alfalfa (Medicago sativa L.) decayed root channels on soil water infiltration.JOURNAL OF HYDROLOGY,578.
MLA	Guo, Lei,et al."Preferential water flow: Influence of alfalfa (Medicago sativa L.) decayed root channels on soil water infiltration".JOURNAL OF HYDROLOGY 578(2019).