Improving the precision of irrigation in a pistachio farm using an unmanned airborne thermal system

被引：48
作者：
Gonzalez-Dugo, V. [1 ]
Goldhamer, D. [2 ]
Zarco-Tejada, P. J. [1 ]
Fereres, E. [1 ,3 ]
机构：
[1] CSIC, IAS, Cordoba 14004, Spain
[2] Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA
[3] Univ Cordoba, Dept Agron, Cordoba 14014, Spain
来源：
IRRIGATION SCIENCE | 2015年 / 33卷 / 01期
关键词：
CROP WATER-STRESS; CANOPY TEMPERATURE; AERIAL VEHICLE; INDEX; VARIABILITY; MANAGEMENT; INDICATOR; IMAGERY;
D O I：
10.1007/s00271-014-0447-z
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
A study was conducted in a large pistachio farm in Madera County, California, to assess the spatial variability in water status and irrigation needs by using high-resolution thermal imagery acquired by an unmanned aerial system. We determined the Crop Water Stress Index (CWSI) of two fields, 130 ha each, based on canopy temperature measurements of individual tree crowns, thus assessing the spatial variations in tree water status within each field. The CWSI of each potential management unit (sectors encompassing about 175 trees) was then calculated and related to the days since last irrigation (DSLI) in F1 and F2. The relationship between CWSI and DSLI was established to calculate the average CWSI corresponding to the whole area that was irrigated on the same day. This value was afterward compared with the actual CWSI value of each management unit as a proxy of the spatial variability in CWSI. This information was used to calculate the deviation of each irrigation unit from the fixed irrigation schedule for the whole fields. Our results show that it is feasible to use high-resolution thermal imagery for integrating the crop response in irrigation performance assessment and for providing recommendations at the farm scale.
引用
收藏
页码：43 / 52
页数：10
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