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Screen constructions: Microclimate and water use in Israel
Year:
2012
Source of publication :
Acta Horticulturae
Authors :
Cohen, Shabtai
;
.
Tanny, Josef
;
.
Volume :
927
Co-Authors:
Tanny, J., Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Cohen, S., Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Israeli, Y., Jordan Valley Banana, Experimental Station, Zemach, 15132, Israel
Facilitators :
From page:
515
To page:
528
(
Total pages:
14
)
Abstract:
The use of screens and screenhouses is constantly increasing, especially in arid and semi-arid regions where their use is environmentally sound. This is due to several reasons: (i) the relatively low initial and maintenance costs; (ii) saving irrigation water - a crucial environmental issue; (iii) improved yield quality; (iv) reduction in pesticide application by using high mesh screens. Our research group has been studying the microclimate, crop water use and water use efficiency of crops under screens and in screenhouses. This paper will review major findings of these studies. In Israel, much of the banana cultivation has moved inside screenhouses in order to save water and improve fruit quality. In the Jordan Valley water savings can reach 20-30% with the same and even better yield. Thus, water use efficiency is increased. Measurements and modelling have demonstrated that in this region the major factors contributing to evapotranspiration reduction under summer conditions are radiation and wind speed reduction. Pepper is mainly grown in screenhouses with high-mesh insect-proof screens. These screens are efficient in excluding the insects but they inhibit ventilation and reduce incoming radiation. Measurements have shown a reduction of about 50- 70% in ventilation rate, and about 50% reduction in crop water use, as compared to estimated values for an open pepper field. The reduction in turbulent transport of mass and momentum was demonstrated through the study of aerodynamic properties of boundary layers along screens. These studies showed reduced friction velocities and roughness lengths above a covered citrus orchard. These findings support the observed reduction in evapotranspiration from covered crops.
Note:
Related Files :
Air humidity
air temperature
Air velocity
Citrus
Crop water consumption
evapotranspiration
Hexapoda
microclimate
yield
Show More
Related Content
More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
Conference paper
;
.
Language:
English
Editors' remarks:
ID:
31405
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:02
Scientific Publication
Screen constructions: Microclimate and water use in Israel
927
Tanny, J., Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Cohen, S., Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Israeli, Y., Jordan Valley Banana, Experimental Station, Zemach, 15132, Israel
Screen constructions: Microclimate and water use in Israel
The use of screens and screenhouses is constantly increasing, especially in arid and semi-arid regions where their use is environmentally sound. This is due to several reasons: (i) the relatively low initial and maintenance costs; (ii) saving irrigation water - a crucial environmental issue; (iii) improved yield quality; (iv) reduction in pesticide application by using high mesh screens. Our research group has been studying the microclimate, crop water use and water use efficiency of crops under screens and in screenhouses. This paper will review major findings of these studies. In Israel, much of the banana cultivation has moved inside screenhouses in order to save water and improve fruit quality. In the Jordan Valley water savings can reach 20-30% with the same and even better yield. Thus, water use efficiency is increased. Measurements and modelling have demonstrated that in this region the major factors contributing to evapotranspiration reduction under summer conditions are radiation and wind speed reduction. Pepper is mainly grown in screenhouses with high-mesh insect-proof screens. These screens are efficient in excluding the insects but they inhibit ventilation and reduce incoming radiation. Measurements have shown a reduction of about 50- 70% in ventilation rate, and about 50% reduction in crop water use, as compared to estimated values for an open pepper field. The reduction in turbulent transport of mass and momentum was demonstrated through the study of aerodynamic properties of boundary layers along screens. These studies showed reduced friction velocities and roughness lengths above a covered citrus orchard. These findings support the observed reduction in evapotranspiration from covered crops.
Scientific Publication
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