Arid
DOI10.21273/HORTSCI13498-18
Water Stress Patterns of Xerophytic Plants in an Urban Landscape
Martinson, Richard1; Lambrinos, John1; Mata-Gonzalez, Ricardo2
通讯作者Martinson, Richard
来源期刊HORTSCIENCE
ISSN0018-5345
EISSN2327-9834
出版年2019
卷号54期号:5页码:818-823
英文摘要

Efficient water use in urban landscapes is a common objective throughout the western United States. Vegetative species promoted for their drought tolerance characteristics are often included in landscapes designed for resource conservation. However, water requirements of most common landscape species have not been quantified. This is especially true for xerophytic species. This lack of landscape plant water requirement data is a significant constraint on the design of efficient irrigation systems and management practices affecting urban landscape water use. Current irrigation practices often fail to consider the unique physiology of xerophytic species, and irrigation scheduling models may not be appropriate for xeric landscapes using xerophytic vegetation as the primary method of reducing water use. This work describes the seasonal patterns of growth and xylem water status for four regionally native xeric shrub species planted in an unirrigated urban landscape in the semi-arid environment of central Oregon. The four species (Artemisia tridentata, Holodiscus microphyllus, Ericameria nauseosa, and Ribes cereum) exhibited substantial growth over the course of 18 months without irrigation in a heavily modified urban soil profile. Water potential of the four species was strongly correlated with surface (10 cm) soil moisture (r >= 0.90), less so with reference monthly evapotranspiration (r <= 0.55), and only weakly with water vapor deficit (r <= 0.22). In A. tridentata and H. microphyllus, xylem water potential became more negative during the growing season and tracked the seasonal decline in soil moisture. In contrast, the xylem water potential of E. nauseosa and R. cereum tracked soil moisture early in the season but became less responsive to soil moisture in the driest months, suggesting different drought adaptation strategies in these species. Three of the four species showed no visual signs of drought stress and maintained acceptable aesthetics even as soil moisture decreased to less than 10%. However, R. cereum exhibited a drought dormancy strategy that made it less aesthetically desirable. These results suggest that extreme xerophytic shrubs provide an opportunity for significant reductions in water use in urban landscapes.


英文关键词urban landscapes xeric native plants water budgeting water potential
类型Article
语种英语
国家USA
收录类别SCI-E ; SSCI
WOS记录号WOS:000469238600010
WOS关键词SOIL-MOISTURE ; UNITED-STATES ; CONSERVATION ; IRRIGATION ; COEFFICIENTS ; DYNAMICS
WOS类目Horticulture
WOS研究方向Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/216144
作者单位1.Oregon State Univ, Dept Hort, 4017 Agr & Life Sci Bldg, Corvallis, OR 97331 USA;
2.Oregon State Univ, Dept Anim & Rangeland Sci, 112 Withycombe Hall, Corvallis, OR 97331 USA
推荐引用方式
GB/T 7714
Martinson, Richard,Lambrinos, John,Mata-Gonzalez, Ricardo. Water Stress Patterns of Xerophytic Plants in an Urban Landscape[J],2019,54(5):818-823.
APA Martinson, Richard,Lambrinos, John,&Mata-Gonzalez, Ricardo.(2019).Water Stress Patterns of Xerophytic Plants in an Urban Landscape.HORTSCIENCE,54(5),818-823.
MLA Martinson, Richard,et al."Water Stress Patterns of Xerophytic Plants in an Urban Landscape".HORTSCIENCE 54.5(2019):818-823.
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