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פותח על ידי קלירמאש פתרונות בע"מ -
Development of alternate cut-flower rose greenhouse temperature set-points based on calorimetric plant tissue evaluation
Year:
2010
Source of publication :
Scientia Horticulturae
Authors :
מדינה, שלומית
;
.
רביב, מיכאל
;
.
Volume :
126
Co-Authors:
Raviv, M., Agricultural Research Organization, Newe Ya'ar research Center, P.O. Box 1021, Ramat Yishay, 30095, Israel
Medina, S., Agricultural Research Organization, Newe Ya'ar research Center, P.O. Box 1021, Ramat Yishay, 30095, Israel
Wendin, C., Dept. of Plant Sciences, University of California, Mailstop 2, Davis, One Shields Ave, Davis 95616, CA, United States
Lieth, J.H., Dept. of Plant Sciences, University of California, Mailstop 2, Davis, One Shields Ave, Davis 95616, CA, United States
Facilitators :
From page:
454
To page:
461
(
Total pages:
8
)
Abstract:
Energy utilization for heating is one of the most expensive greenhouse climate control operations. The temperature set-point is determined by many interrelated environmental, physiological, and economic factors but is fundamentally driven by the required growth rate of the plant or crop for quality and profitability. Temperatures are maintained to maximize production and affect timing of harvest of greenhouse-grown crops. In general, winter greenhouse environments for most cut-flower roses are heated to a target temperature of 16-18 °C. For rose, such temperature targets are based on grower experience along with horticultural research and should be considered a compromise across all factors. In the current research we studied the concept of " potential growth rate" (PGR), based on a thermodynamic growth model and how PGR relates to the typical temperature recommendation (TTR) for set-points for greenhouse heating and cooling in commercial horticultural production. PGR of specific growing organs (leaves, shoot tips, roots, etc) can be deduced using calorespirometric measurements in relation to various environmental factors such as temperature effect on biomass production. This research consisted of two facets: (1) determination of cultivar-specific alternate TTRs based on calorimetric PGR measurement and then (2) testing these TTRs in greenhouse rose flower production. The results of this study suggested that TTRs for the cultivar 'Kardinal' can be lowered at the time of bud emergence, when this cultivar can tolerate a lower temperature. Also, since the cultivar 'Milva' can tolerate lower temperature at time of leaflet unfolding, the current TTR can be adjusted to reflect this. We investigated a set of alternate TTRs by growing rose plants on movable carts and shifting them to various pre-determined night temperature conditions. During the relevant growing stages, half of the plants were given a cold night temperature (14 °C) treatment, while control plants were left in the normal greenhouse temperature (18 °C). This procedure was repeated for three flushes of flowering rose shoots. Flower shoots were counted and weighed (fresh and dry); shoot length was measured several times per week. It was found that the predictions were valid and (with one exception) no significant effect on the number of flowers, their quality or biomass was caused by this procedure. The implication of this work is that heating cost can be reduced for some rose cultivars by allowing night temperatures to be lower than the typical recommendations for those cultivars that show high metabolic activity at such cooler conditions. © 2010 Elsevier B.V.
Note:
Related Files :
agricultural production
energy conservation
heating
horticulture
Rosa
temperature effect
temperature profile
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.scienta.2010.08.011
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
23146
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:57
Scientific Publication
Development of alternate cut-flower rose greenhouse temperature set-points based on calorimetric plant tissue evaluation
126
Raviv, M., Agricultural Research Organization, Newe Ya'ar research Center, P.O. Box 1021, Ramat Yishay, 30095, Israel
Medina, S., Agricultural Research Organization, Newe Ya'ar research Center, P.O. Box 1021, Ramat Yishay, 30095, Israel
Wendin, C., Dept. of Plant Sciences, University of California, Mailstop 2, Davis, One Shields Ave, Davis 95616, CA, United States
Lieth, J.H., Dept. of Plant Sciences, University of California, Mailstop 2, Davis, One Shields Ave, Davis 95616, CA, United States
Development of alternate cut-flower rose greenhouse temperature set-points based on calorimetric plant tissue evaluation
Energy utilization for heating is one of the most expensive greenhouse climate control operations. The temperature set-point is determined by many interrelated environmental, physiological, and economic factors but is fundamentally driven by the required growth rate of the plant or crop for quality and profitability. Temperatures are maintained to maximize production and affect timing of harvest of greenhouse-grown crops. In general, winter greenhouse environments for most cut-flower roses are heated to a target temperature of 16-18 °C. For rose, such temperature targets are based on grower experience along with horticultural research and should be considered a compromise across all factors. In the current research we studied the concept of " potential growth rate" (PGR), based on a thermodynamic growth model and how PGR relates to the typical temperature recommendation (TTR) for set-points for greenhouse heating and cooling in commercial horticultural production. PGR of specific growing organs (leaves, shoot tips, roots, etc) can be deduced using calorespirometric measurements in relation to various environmental factors such as temperature effect on biomass production. This research consisted of two facets: (1) determination of cultivar-specific alternate TTRs based on calorimetric PGR measurement and then (2) testing these TTRs in greenhouse rose flower production. The results of this study suggested that TTRs for the cultivar 'Kardinal' can be lowered at the time of bud emergence, when this cultivar can tolerate a lower temperature. Also, since the cultivar 'Milva' can tolerate lower temperature at time of leaflet unfolding, the current TTR can be adjusted to reflect this. We investigated a set of alternate TTRs by growing rose plants on movable carts and shifting them to various pre-determined night temperature conditions. During the relevant growing stages, half of the plants were given a cold night temperature (14 °C) treatment, while control plants were left in the normal greenhouse temperature (18 °C). This procedure was repeated for three flushes of flowering rose shoots. Flower shoots were counted and weighed (fresh and dry); shoot length was measured several times per week. It was found that the predictions were valid and (with one exception) no significant effect on the number of flowers, their quality or biomass was caused by this procedure. The implication of this work is that heating cost can be reduced for some rose cultivars by allowing night temperatures to be lower than the typical recommendations for those cultivars that show high metabolic activity at such cooler conditions. © 2010 Elsevier B.V.
Scientific Publication
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