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פותח על ידי קלירמאש פתרונות בע"מ -
Effects of a shading screen on microclimate and crop water requirements
Year:
2007
Source of publication :
Irrigation Science
Authors :
אסולין, שמואל
;
.
Volume :
25
Co-Authors:
Möller, M., Department of Environmental Physics and Irrigation, Institute of Soil, Water and Environmental Sciences, ARO-Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
Assouline, S., Department of Environmental Physics and Irrigation, Institute of Soil, Water and Environmental Sciences, ARO-Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
Facilitators :
From page:
171
To page:
181
(
Total pages:
11
)
Abstract:
Despite the steadily increasing area under protected agriculture there is a current lack of knowledge about the effects of the 30% black shading screen on microclimate and crop water requirements. Meteorological and lysimeter measurements inside a screenhouse planted with sweet pepper were compared to external reference data. Irrigation water use efficiency (IWUE) was calculated from yield records Y and water meter readings I applied. Shading reduced mean global radiation R G by more than 40%, and the screen transmissivity τ screen was shown to vary with solar elevation angle β. Wind speed inside the screenhouse u in was reduced by more than 50%. Crop water requirements ET c were 38% lower than estimates for an open field crop, suggesting a significant water saving potential when using screenhouses. However, the screen did not significantly modify maximum temperature T max and daily vapor pressure deficit. The FAO-Penman-Monteith approach based on meteorological measurements in the screenhouse accurately predicted daily crop evapotranspiration, and was in close agreement with lysimeter measurements. IWUE was relatively high (10.7 kg m -3 in 2004 and 13.5 kg m-3 in 2005), but additional research is required to quantify the effect of shading on yield as well as to determine the water saving potential of other commonly used screens. © 2006 Springer-Verlag.
Note:
Related Files :
evapotranspiration
irrigation
lysimeter
transpiration
water use efficiency
wind
עוד תגיות
תוכן קשור
More details
DOI :
10.1007/s00271-006-0045-9
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
21997
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:48
Scientific Publication
Effects of a shading screen on microclimate and crop water requirements
25
Möller, M., Department of Environmental Physics and Irrigation, Institute of Soil, Water and Environmental Sciences, ARO-Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
Assouline, S., Department of Environmental Physics and Irrigation, Institute of Soil, Water and Environmental Sciences, ARO-Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
Effects of a shading screen on microclimate and crop water requirements
Despite the steadily increasing area under protected agriculture there is a current lack of knowledge about the effects of the 30% black shading screen on microclimate and crop water requirements. Meteorological and lysimeter measurements inside a screenhouse planted with sweet pepper were compared to external reference data. Irrigation water use efficiency (IWUE) was calculated from yield records Y and water meter readings I applied. Shading reduced mean global radiation R G by more than 40%, and the screen transmissivity τ screen was shown to vary with solar elevation angle β. Wind speed inside the screenhouse u in was reduced by more than 50%. Crop water requirements ET c were 38% lower than estimates for an open field crop, suggesting a significant water saving potential when using screenhouses. However, the screen did not significantly modify maximum temperature T max and daily vapor pressure deficit. The FAO-Penman-Monteith approach based on meteorological measurements in the screenhouse accurately predicted daily crop evapotranspiration, and was in close agreement with lysimeter measurements. IWUE was relatively high (10.7 kg m -3 in 2004 and 13.5 kg m-3 in 2005), but additional research is required to quantify the effect of shading on yield as well as to determine the water saving potential of other commonly used screens. © 2006 Springer-Verlag.
Scientific Publication
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