干旱区生态环境知识资源中心(Arid): A methodological approach to assess canopy NDVI-based tomato dynamics under irrigation treatments

Arid

DOI	10.1016/j.agwat.2020.106208
	A methodological approach to assess canopy NDVI-based tomato dynamics under irrigation treatments
	Grados, D.; Reynarfaje, X.; Schrevens, E.
通讯作者	Grados, D
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2020
卷号	240
英文摘要	A tomato field experiment under deficit irrigation treatments was established to assess the feasibility of non-linear mixed models to predict the change in the canopy Normalized Difference Vegetation Index (NDVI) along the growing season. The irrigation doses were 50, 70, 85, and 100 % of the actual evapotranspiration (ETc). The experiment was performed in the Peruvian Arid Coastal Region (13.10 S, 76.37 W). On-ground destructive plant measurements (7 times) allowed to obtain the leaf area index (LAI) and the canopy equivalent water thickness (EWTcanopy) to validate the experiment. Similarly, volumetric soil moisture was monitored at three hours interval using time-domain reflectometry. High-resolution multispectral imagery was acquired along the growing season (10 times) using an unmanned aerial vehicle. NDVI at plant level was obtained based on oversegmented imagery. The canopy NDVI growth curves were obtained in relation to the irrigation treatments and growing degree days (GDD) using a nonlinear mixed model. Deficit irrigation doses (50, 70 and 85 % ETc) induced lower biomass accumulation and greatly affected LAI and EWTcanopy, attaining lower values (p < 0.05) than the control (100 % ETc). In spite of reaching higher LAI and EWTcanopy values, 70 % ETc was not significantly different from 50 % ETc (p < 0.05) showing the difficulty to accurately discriminate treatments with high deficit irrigation; 85 % ETc produced important differences on EWTcanopy and LAI compared to the other deficit irrigation treatments (p < 0.05) due to a higher leaf area expansion. Deficit irrigation doses led to less vigorous plants resulting in lower NDVI compared to the control. Notwithstanding 50 % ETc obtained lower NDVI values than 70 % ETc, differences were not significant. Volumetric soil moisture was consistent with the irrigation treatments, resulting in a decreased trend with decreasing water application along the growing season. A three-parameter logistic mixed model was found to be well-suited to fit the tomato canopy NDVI growth curves in function of the irrigation treatments (i.e. fixed effects) considering the plant-specific variability (i.e. random effects). At maturity stage, significant differences of the deficit irrigation treatments from the control were obtained (p < 0.05) when cumulative effect of the treatments was well-defined and NDVI reached asymptotic behavior. During the vegetative stage, the inflection point marked the fastest NDVI growth rate for the 100 % ETc treatment whereas the lowest for the 50 % ETc (p < 0.05). The diagnosis plots and the low root mean squared error of the residuals indicated the suitability of using the three-parameter logistic growth curve estimated as a nonlinear mixed model to predict NDVI.
英文关键词	Deficit irrigation Unmanned aerial vehicle Multispectral sensor Vegetation index Nonlinear mixed model
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000546646400013
WOS关键词	WATER-STRESS DETECTION ; SPECTRAL REFLECTANCE INDEXES ; DEFICIT IRRIGATION ; USE EFFICIENCY ; PROCESSING TOMATO ; GAS-EXCHANGE ; YIELD ; CROP ; VEGETATION ; TEMPERATURE
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324967
作者单位	[Grados, D.; Reynarfaje, X.; Schrevens, E.] Katholieke Univ Leuven, Fac Biosci Engn, Dept Biosyst, Leuven, Belgium; [Grados, D.; Reynarfaje, X.] Univ Nacl Agr la Molina, Lima 12, Peru
推荐引用方式 GB/T 7714	Grados, D.,Reynarfaje, X.,Schrevens, E.. A methodological approach to assess canopy NDVI-based tomato dynamics under irrigation treatments[J],2020,240.
APA	Grados, D.,Reynarfaje, X.,&Schrevens, E..(2020).A methodological approach to assess canopy NDVI-based tomato dynamics under irrigation treatments.AGRICULTURAL WATER MANAGEMENT,240.
MLA	Grados, D.,et al."A methodological approach to assess canopy NDVI-based tomato dynamics under irrigation treatments".AGRICULTURAL WATER MANAGEMENT 240(2020).