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פותח על ידי קלירמאש פתרונות בע"מ -
Night-time transpiration in greenhouses
Year:
1990
Source of publication :
Scientia Horticulturae
Authors :
לבב, נחום
;
.
פיפר, אורי
;
.
Volume :
41
Co-Authors:
Seginer, I., Department of Agricultural Engineering, Technion, Haifa, 32000, Israel
Kantz, D., Department of Agricultural Engineering, Technion, Haifa, 32000, Israel
Levav, N., Institute of Agricultural Engineering, ARO, Bet-Dagan, 50250, Israel
Peiper, U.M., Institute of Agricultural Engineering, ARO, Bet-Dagan, 50250, Israel
Facilitators :
From page:
265
To page:
276
(
Total pages:
12
)
Abstract:
High night-time humidity in greenhouses is characteristic of well insulated houses in mild weather. Using ventilation to remove excess vapour increases the energy requirement of a greenhouse in direct proportion to the amount of vapour to be removed which, in turn, increases linearly with canopy conductance. The night-time transpiration of several greenhouse crops was measured and their leaf conductance and resistance to vapour flux were determined by two methods: a weighing method was used for individual containers and a vapour balance method for a whole compartment. A few night-long comparisons between the two methods gave good agreement. A wide range of leaf resistances was obtained, from 500 to 2000 s m-1 for vegetables, from 2000 to 5000 s m-1 for most foliage and flower plants, with one crop reaching 20 000 s m-1. © 1990.
Note:
Related Files :
Dehumidification
greenhouse
leaf resistance
night transpiration
vapour balance
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/0304-4238(90)90009-4
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
30475
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:54
Scientific Publication
Night-time transpiration in greenhouses
41
Seginer, I., Department of Agricultural Engineering, Technion, Haifa, 32000, Israel
Kantz, D., Department of Agricultural Engineering, Technion, Haifa, 32000, Israel
Levav, N., Institute of Agricultural Engineering, ARO, Bet-Dagan, 50250, Israel
Peiper, U.M., Institute of Agricultural Engineering, ARO, Bet-Dagan, 50250, Israel
Night-time transpiration in greenhouses
High night-time humidity in greenhouses is characteristic of well insulated houses in mild weather. Using ventilation to remove excess vapour increases the energy requirement of a greenhouse in direct proportion to the amount of vapour to be removed which, in turn, increases linearly with canopy conductance. The night-time transpiration of several greenhouse crops was measured and their leaf conductance and resistance to vapour flux were determined by two methods: a weighing method was used for individual containers and a vapour balance method for a whole compartment. A few night-long comparisons between the two methods gave good agreement. A wide range of leaf resistances was obtained, from 500 to 2000 s m-1 for vegetables, from 2000 to 5000 s m-1 for most foliage and flower plants, with one crop reaching 20 000 s m-1. © 1990.
Scientific Publication
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