נגישות
menu      
חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Evaluation of palm trees water availability using remote thermal imaging
Year:
2009
Authors :
אלחנתי, ויקטור
;
.
כהן, יובל
;
.
כהן, יפית
;
.
לוי, אהרון
;
.
סורוקר, ויקטוריה
;
.
פריגוז'ין, עדי
;
.
Volume :
Co-Authors:
Cohen, Y., Agricultural Research Organization (ARO), Institute of Agricultural Engineering, Bet-Dagan, Israel
Alchanatis, V., Agricultural Research Organization (ARO), Institute of Agricultural Engineering, Bet-Dagan, Israel
Levi, A., Agricultural Research Organization (ARO), Institute of Agricultural Engineering, Bet-Dagan, Israel
Soroker, V., Agricultural Research Organization (ARO), Entomology, Bet-Dagan, Israel
Prigojin, A., Agricultural Research Organization (ARO), Institute of Agricultural Engineering, Bet-Dagan, Israel, Ben-Gurion University, Department of Geography and Environmental Development, Beer-Sheva, Israel
Cohen, Y., Agricultural Research Organization (ARO), Entomology, Bet-Dagan, Israel
Facilitators :
From page:
159
To page:
166
(
Total pages:
8
)
Abstract:
Thermal images of date palm trees (Phoenix dactylifera L., cv. Medjool) under two irrigation levels (commercial and 80% deficit) were acquired from an elevated stage reaching about 5m above the trees canopy. Leaf temperature of single trees canopy was extracted from the thermal images. The temperature of the commercial irrigation level was lower than that of the water stressed palms by 2-3 degrees. Based on these results airborne thermal images were acquired over a number of palm orchards along the Jordan valley. In 4 of the orchards, two irrigation levels were applied (commercial and 80% deficit). The thermal images were processed to map the canopy temperature of the palm trees. First, palm trees canopy was extracted mainly from soil. A watershed image processing algorithm was employed to find the low temperature sinks that represent the canopy. Then, binary image was transformed to polygons of canopy outlines. A random set of trees (polygons) was selected from each plot, allowing for a minimal distance between the selected trees (calculated by the semivariogram of the original thermal image). Statistical analysis of the temperature of the randomly selected sets revealed that the canopy temperature in the reduced irrigated plots was significantly higher than that of the commercially irrigated one. The results of this work indicate the potential use of airborne thermal images to assess the water availability of individual date palm for site specific irrigation management.
Note:
Related Files :
Forestry
irrigation
Low temperatures
Orchards
Site specific irrigation
water availability
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
24257
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:06
Scientific Publication
Evaluation of palm trees water availability using remote thermal imaging
Cohen, Y., Agricultural Research Organization (ARO), Institute of Agricultural Engineering, Bet-Dagan, Israel
Alchanatis, V., Agricultural Research Organization (ARO), Institute of Agricultural Engineering, Bet-Dagan, Israel
Levi, A., Agricultural Research Organization (ARO), Institute of Agricultural Engineering, Bet-Dagan, Israel
Soroker, V., Agricultural Research Organization (ARO), Entomology, Bet-Dagan, Israel
Prigojin, A., Agricultural Research Organization (ARO), Institute of Agricultural Engineering, Bet-Dagan, Israel, Ben-Gurion University, Department of Geography and Environmental Development, Beer-Sheva, Israel
Cohen, Y., Agricultural Research Organization (ARO), Entomology, Bet-Dagan, Israel
Evaluation of palm trees water availability using remote thermal imaging
Thermal images of date palm trees (Phoenix dactylifera L., cv. Medjool) under two irrigation levels (commercial and 80% deficit) were acquired from an elevated stage reaching about 5m above the trees canopy. Leaf temperature of single trees canopy was extracted from the thermal images. The temperature of the commercial irrigation level was lower than that of the water stressed palms by 2-3 degrees. Based on these results airborne thermal images were acquired over a number of palm orchards along the Jordan valley. In 4 of the orchards, two irrigation levels were applied (commercial and 80% deficit). The thermal images were processed to map the canopy temperature of the palm trees. First, palm trees canopy was extracted mainly from soil. A watershed image processing algorithm was employed to find the low temperature sinks that represent the canopy. Then, binary image was transformed to polygons of canopy outlines. A random set of trees (polygons) was selected from each plot, allowing for a minimal distance between the selected trees (calculated by the semivariogram of the original thermal image). Statistical analysis of the temperature of the randomly selected sets revealed that the canopy temperature in the reduced irrigated plots was significantly higher than that of the commercially irrigated one. The results of this work indicate the potential use of airborne thermal images to assess the water availability of individual date palm for site specific irrigation management.
Scientific Publication
You may also be interested in