Membership function model for defining optimality of vapor pressure deficit in closed-field cultivation of tomato
Estimation of plant’s evapotranspiration (ET) or water loss to the atmosphere depends on the vapor pressure deficit (VPD) of the closed-field environment (greenhouse). The objective of this work was to develop a membership function model for defining optimal VPD of greenhouse air for tomato cultivat...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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International Society for Horticultural Science
2016
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| Online Access: | http://psasir.upm.edu.my/id/eprint/62388/1/Membership%20function%20model%20for%20defining%20optimality%20of%20vapor%20pressure%20deficit%20in%20closed-field%20cultivation%20of%20tomato.pdf |
| _version_ | 1825932482821750784 |
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| author | Shamshiri, Ramin Che Man, Hasfalina Zakaria, Abd Jamil Beveren, Peter van Wan Ismail, Wan Ishak Ahmad, Desa |
| author_facet | Shamshiri, Ramin Che Man, Hasfalina Zakaria, Abd Jamil Beveren, Peter van Wan Ismail, Wan Ishak Ahmad, Desa |
| author_sort | Shamshiri, Ramin |
| collection | UPM |
| description | Estimation of plant’s evapotranspiration (ET) or water loss to the atmosphere depends on the vapor pressure deficit (VPD) of the closed-field environment (greenhouse). The objective of this work was to develop a membership function model for defining optimal VPD of greenhouse air for tomato cultivation (Lycopersicon esculentum) at different growth stages (GS) and light conditions (sun, cloud, night). Mathematical descriptions of a peer-reviewed published growth response (GR) model for optimal greenhouse air temperature (T) and relative humidity (rH) were derived and implemented in a computer program. An incremental algorithm was written in MATLAB© based on definitive concepts in VPD equations and the GR model. Non-linear regression was applied to describe mathematical relationship between the incremented outputs of the model and the calculated VPD values (R2=0.999 to 1). Results were validated with three published literatures and were shown to be capable of exploring optimal levels of VPD by means of real numbers between 0 and 1. This study can contribute to knowledge-based information and decision support systems in greenhouse climate control and management by quantifying comfort level of microclimate. |
| first_indexed | 2024-03-06T09:42:43Z |
| format | Article |
| id | upm.eprints-62388 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T09:42:43Z |
| publishDate | 2016 |
| publisher | International Society for Horticultural Science |
| record_format | dspace |
| spelling | upm.eprints-623882020-01-09T08:42:09Z http://psasir.upm.edu.my/id/eprint/62388/ Membership function model for defining optimality of vapor pressure deficit in closed-field cultivation of tomato Shamshiri, Ramin Che Man, Hasfalina Zakaria, Abd Jamil Beveren, Peter van Wan Ismail, Wan Ishak Ahmad, Desa Estimation of plant’s evapotranspiration (ET) or water loss to the atmosphere depends on the vapor pressure deficit (VPD) of the closed-field environment (greenhouse). The objective of this work was to develop a membership function model for defining optimal VPD of greenhouse air for tomato cultivation (Lycopersicon esculentum) at different growth stages (GS) and light conditions (sun, cloud, night). Mathematical descriptions of a peer-reviewed published growth response (GR) model for optimal greenhouse air temperature (T) and relative humidity (rH) were derived and implemented in a computer program. An incremental algorithm was written in MATLAB© based on definitive concepts in VPD equations and the GR model. Non-linear regression was applied to describe mathematical relationship between the incremented outputs of the model and the calculated VPD values (R2=0.999 to 1). Results were validated with three published literatures and were shown to be capable of exploring optimal levels of VPD by means of real numbers between 0 and 1. This study can contribute to knowledge-based information and decision support systems in greenhouse climate control and management by quantifying comfort level of microclimate. International Society for Horticultural Science 2016-08 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/62388/1/Membership%20function%20model%20for%20defining%20optimality%20of%20vapor%20pressure%20deficit%20in%20closed-field%20cultivation%20of%20tomato.pdf Shamshiri, Ramin and Che Man, Hasfalina and Zakaria, Abd Jamil and Beveren, Peter van and Wan Ismail, Wan Ishak and Ahmad, Desa (2016) Membership function model for defining optimality of vapor pressure deficit in closed-field cultivation of tomato. Acta Horticulturae, 1152. 281 - 290. ISSN 0567-7572 http://agris.fao.org/agris-search/search.do?recordID=US201700197376 |
| spellingShingle | Shamshiri, Ramin Che Man, Hasfalina Zakaria, Abd Jamil Beveren, Peter van Wan Ismail, Wan Ishak Ahmad, Desa Membership function model for defining optimality of vapor pressure deficit in closed-field cultivation of tomato |
| title | Membership function model for defining optimality of vapor pressure deficit in closed-field cultivation of tomato |
| title_full | Membership function model for defining optimality of vapor pressure deficit in closed-field cultivation of tomato |
| title_fullStr | Membership function model for defining optimality of vapor pressure deficit in closed-field cultivation of tomato |
| title_full_unstemmed | Membership function model for defining optimality of vapor pressure deficit in closed-field cultivation of tomato |
| title_short | Membership function model for defining optimality of vapor pressure deficit in closed-field cultivation of tomato |
| title_sort | membership function model for defining optimality of vapor pressure deficit in closed field cultivation of tomato |
| url | http://psasir.upm.edu.my/id/eprint/62388/1/Membership%20function%20model%20for%20defining%20optimality%20of%20vapor%20pressure%20deficit%20in%20closed-field%20cultivation%20of%20tomato.pdf |
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