干旱区生态环境知识资源中心(Arid): Evaluating the accuracy of soil water sensors for irrigation scheduling to conserve freshwater

Arid

DOI	10.1007/s13201-012-0032-7
	Evaluating the accuracy of soil water sensors for irrigation scheduling to conserve freshwater
	Ganjegunte, Girisha K.; Sheng, Zhuping; Clark, John A.
通讯作者	Ganjegunte, GK
来源期刊	APPLIED WATER SCIENCE
ISSN	2190-5487
EISSN	2190-5495
出版年	2012
卷号	2 期号:2 页码:119-125
英文摘要	In the Trans-Pecos area, pecan [Carya illinoinensis (Wangenh) C. Koch] is a major irrigated cash crop. Pecan trees require large amounts of water for their growth and flood (border) irrigation is the most common method of irrigation. Pecan crop is often over irrigated using traditional method of irrigation scheduling by counting number of calendar days since the previous irrigation. Studies in other pecan growing areas have shown that the water use efficiency can be improved significantly and precious freshwater can be saved by scheduling irrigation based on soil moisture conditions. This study evaluated the accuracy of three recent low cost soil water sensors (ECH2O-5TE, Watermark 200SS and Tensiometer model R) to monitor volumetric soil water content (hv) to develop improved irrigation scheduling in a mature pecan orchard in El Paso, Texas. Results indicated that while all three sensors were successful in following the general trends of soil moisture conditions during the growing season, actual measurements differed significantly. Statistical analyses of results indicated that Tensiometer provided relatively accurate soil moisture data than ECH2O-5TE and Watermark without site-specific calibration. While ECH2O-5TE overestimated the soil water content, Watermark and Tensiometer underestimated. Results of this study suggested poor accuracy of all three sensors if factory calibration and reported soil water retention curve for study site soil texture were used. This indicated that sensors needed site-specific calibration to improve their accuracy in estimating soil water content data.
英文关键词	Arid regions Freshwater conservation Irrigated pecans Irrigation scheduling Real time soil moisture data Soil moisture sensors Water scarcity
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000219064900007
WOS关键词	VARIABILITY ; MANAGEMENT ; PROFILE ; FIELD
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/330066
作者单位	[Ganjegunte, Girisha K.; Clark, John A.] Texas A&M Univ Syst, Dept Soil & Crop Sci, Texas Agrilife Res Ctr El Paso, 1380 A&M Circle, El Paso, TX 79927 USA; [Sheng, Zhuping] Texas A&M Univ Syst, Dept Biol & Agr Engn, Texas Agrilife Res Ctr El Paso, El Paso, TX 79927 USA
推荐引用方式 GB/T 7714	Ganjegunte, Girisha K.,Sheng, Zhuping,Clark, John A.. Evaluating the accuracy of soil water sensors for irrigation scheduling to conserve freshwater[J],2012,2(2):119-125.
APA	Ganjegunte, Girisha K.,Sheng, Zhuping,&Clark, John A..(2012).Evaluating the accuracy of soil water sensors for irrigation scheduling to conserve freshwater.APPLIED WATER SCIENCE,2(2),119-125.
MLA	Ganjegunte, Girisha K.,et al."Evaluating the accuracy of soil water sensors for irrigation scheduling to conserve freshwater".APPLIED WATER SCIENCE 2.2(2012):119-125.