Evaluation of different approaches for estimating and mapping crop water status in cotton with thermal imaging

被引：153

作者：

Alchanatis, V. ^{[1
]}

Cohen, Y. ^{[1
]}

Cohen, S. ^{[2
]}

Moller, M. ^{[2
]}

Sprinstin, M. ^{[3
]}

Meron, M. ^{[4
]}

Tsipris, J. ^{[4
]}

Saranga, Y. ^{[5
]}

Sela, E. ^{[1
,5
]}

机构：

[1] Agr Res Org, Volcani Ctr, Inst Agr Engn, IL-50250 Bet Dagan, Israel

[2] Agr Res Org, Volcani Ctr, Inst Soil Water & Environm Sci, IL-50250 Bet Dagan, Israel

[3] Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, IL-84990 Beer Sheva, Israel

[4] Galilee Technol Ctr, IL-12100 Rosh Pinna, Israel

[5] Hebrew Univ Jerusalem, Fac Agr, Jerusalem, Israel

来源：

PRECISION AGRICULTURE | 2010年 / 11卷 / 01期

关键词：

Cotton; Leaf water potential; Site-specific irrigation; Water stress; CWSI; Infrared thermography; Canopy temperature; Remote sensing; CANOPY TEMPERATURE; STOMATAL CONDUCTANCE; STRESS INDEX; IRRIGATION; YIELD; THERMOGRAPHY; VARIABILITY; INDICATOR; GRAPEVINE; IMAGERY;

D O I：

10.1007/s11119-009-9111-7

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Canopy temperature has long been recognized as an indicator of plant water status, therefore, a high-resolution thermal imaging system was used to map crop water status. Potential approaches for estimating crop water status from digital infrared images of the canopy were evaluated. The effect of time of day on leaf temperature measurements was studied: midday was found to be the optimal time for thermal image acquisition. Comparison between theoretical and empirical approaches for estimating leaf water potential showed that empirical temperature baselines were better than those obtained from energy balance equations. Finally, the effects of angle of view and spatial resolution of the thermal images were evaluated: water status was mapped by using angular thermal images. In spite of the different viewing angles and spatial resolution, the map provided a good representation of the measured leaf water potential.

引用

页码：27 / 41

页数：15

共 25 条

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