干旱区生态环境知识资源中心(Arid): Micro-scale spatial variability in soil heat flux (SHF) in a wine-grape vineyard

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DOI	10.1007/s00271-019-00634-6
	Micro-scale spatial variability in soil heat flux (SHF) in a wine-grape vineyard
	Agam, N.1; Kustas, W. P.2; Alfieri, J. G.2; Gao, F.2; McKee, L. M.2; Prueger, J. H.3; Hipps, L. E.4
通讯作者	Agam, N.
来源期刊	IRRIGATION SCIENCE
ISSN	0342-7188
EISSN	1432-1319
出版年	2019
卷号	37 期号:3 页码:253-268
英文摘要	In vineyards, hourly soil heat flux (SHF) may account for as much as 30% of net radiation. Therefore, inaccurate estimates of SHF may lead to non-negligible errors when quantifying the surface energy balance. The typical canopy height to width ratio of two along with widely spaced rows (row spacing exceeding canopy height), and leaf biomass concentrated in the upper half of the vine canopy result in variable shading conditions producing sharp, sometimes abrupt, differences in SHF between adjacent points within the interrow space. Drip irrigation, which is also a typical practice in many vineyards in semi-arid regions, adds an additional source of variability in the interrow soil moisture which strongly affects SHF. Lastly, the common practice in Californian wine-grape vineyards to plant cover crop in the interrow, forming two distinct areas below the canopybare soil and crop cover, further increases SHF variability in the interrow. This small-scale variability challenges the measurement of SHF in such agrosystems. The objective of the research was to assess the micro-scale (within the interrow between two vine rows) spatial variability in SHF, and to determine which of the three variablesnon-uniform (in both space and time) shading patterns, non-uniform surface cover (bare soil vs. cover crop) and non-uniform soil water content (due to the drip irrigation)is the most significant driver for the local heterogeneity. The variability of incoming solar radiation reaching the ground was found to be the primary source for the spatial and temporal variation of SHF once the vine canopy was fully developed. The water content distribution and the grass cover in the interrow both had minor impacts on the spatial and temporal variation in SHF. It was further found that a transect of five equally distributed sensors across the interrow accurately represented the area-average SHF given by the 11-sensor array, particularly during the growing season.
类型	Article
语种	英语
国家	Israel ; USA
收录类别	SCI-E
WOS记录号	WOS:000469391800004
WOS关键词	VEGETATIVE GROWTH ; ENERGY-BALANCE ; COVER CROP ; LONG-TERM ; EVAPORATION ; LANDSAT ; MODEL ; BARE
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	Ben-Gurion University of the Negev
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216560
作者单位	1.Ben Gurion Univ Negev, Blaustein Inst Desert Res, Sede Boqer Campus, IL-84990 Midreshet Ben Gurion, Israel; 2.USDA ARS, Hydrol & Remote Sensing Lab, Beltsville, MD USA; 3.USDA ARS, Natl Lab Agr & Environm, Ames, IA USA; 4.Utah State Univ, Coll Agr & Appl Sci, Plants Soils & Climate Dept, Logan, UT 84322 USA
推荐引用方式 GB/T 7714	Agam, N.,Kustas, W. P.,Alfieri, J. G.,et al. Micro-scale spatial variability in soil heat flux (SHF) in a wine-grape vineyard[J]. Ben-Gurion University of the Negev,2019,37(3):253-268.
APA	Agam, N..,Kustas, W. P..,Alfieri, J. G..,Gao, F..,McKee, L. M..,...&Hipps, L. E..(2019).Micro-scale spatial variability in soil heat flux (SHF) in a wine-grape vineyard.IRRIGATION SCIENCE,37(3),253-268.
MLA	Agam, N.,et al."Micro-scale spatial variability in soil heat flux (SHF) in a wine-grape vineyard".IRRIGATION SCIENCE 37.3(2019):253-268.