干旱区生态环境知识资源中心(Arid): Potential application of spectral indices for olive water status assessment in (semi-)arid regions: A case study in Khuzestan Province, Iran

Arid

DOI	10.1002/pld3.494
	Potential application of spectral indices for olive water status assessment in (semi-)arid regions: A case study in Khuzestan Province, Iran
	Asgari, Azimeh; Hooshmand, Abdolrahim; Broumand-Nasab, Saeed; Zivdar, Shohreh
通讯作者	Hooshmand, A
来源期刊	PLANT DIRECT
EISSN	2475-4455
出版年	2023
卷号	7 期号:6
英文摘要	Spectral indices can be used as fast and non-destructive indicators of plant water status or stress. It is the objective of the present study to evaluate the feasibility of using several spectral indices including water index (WI) and normalized spectral water indices 1-5 (NWI 1-5) to estimate water status in olive trees in arid regions in Iran. The experimental treatments involved two olive cultivars (Koroneiki and T2) and four irrigation regimes (irrigated with 100%, 85%, 70%, and 55% estimated crop evapotranspiration [ETc]). The results obtained showed that olive trees subjected to the different irrigation regimes of 85%, 70%, and 55% ETc experienced soil water content (SWC) deficits by 4.5%, 12%, and 20.5% that of the control, respectively. Significant differences were observed among the treatments with respect to measured relative water content (RWC), SWC, and the spectral indices of WI and NWI 1-5. The normalized spectral indices combining NIR and NIR wavelengths were found more effective in tracking changes in RWC and SWC than those that combine NIR and VIS or VIS and VIS wavelengths, respectively. Spectral indices were closely and significantly associated with RWC (.63<.77) and SWC (.51<.67). Among all the spectral indices investigated, NWI-2 showed the least consistent associations with RWC (ranging from 4-15% lower than the other indices examined) and SWC (ranging from 1-23% lower than the others). Based on the pooled data on spectral indices, RWC, and SWC collected during the study period, WI, NWI-1, NWI-4, and NWI-5 showed stronger correlations with RWC and SWC than did NWI-3 and NWI-2. In conclusion, the spectral indices of WI and NWI 1-5 measured at the leaf level are found useful as fast and non-destructive estimators of plant water stress in arid regions.
英文关键词	olive plant water status relative water content soil water content spectral indices water stress
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:001002491600001
WOS关键词	REFLECTANCE INDEXES ; GRAIN-YIELD ; CANOPY TEMPERATURE ; NITROGEN STATUS ; OIL QUALITY ; IRRIGATION ; WHEAT ; STRESS ; CROP ; PARAMETERS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398030
推荐引用方式 GB/T 7714	Asgari, Azimeh,Hooshmand, Abdolrahim,Broumand-Nasab, Saeed,et al. Potential application of spectral indices for olive water status assessment in (semi-)arid regions: A case study in Khuzestan Province, Iran[J],2023,7(6).
APA	Asgari, Azimeh,Hooshmand, Abdolrahim,Broumand-Nasab, Saeed,&Zivdar, Shohreh.(2023).Potential application of spectral indices for olive water status assessment in (semi-)arid regions: A case study in Khuzestan Province, Iran.PLANT DIRECT,7(6).
MLA	Asgari, Azimeh,et al."Potential application of spectral indices for olive water status assessment in (semi-)arid regions: A case study in Khuzestan Province, Iran".PLANT DIRECT 7.6(2023).