Analysis of the Effect of Concentrations of Four Whitening Products in Cover Transmissivity of Mediterranean Greenhouses
The present work analyses the traditional method of applying whitening products on Mediterranean greenhouses. Four commercial whitening products (agricultural solar protectors, ASPs), applied at four doses, were compared with a non-whitened cover. The traditional product “Blanco de España” with 99%...
| Main Authors: | , , , , , |
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| Format: | info:eu-repo/semantics/article |
| Language: | English |
| Published: |
MDPI
2020
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10835/7650 |
| _version_ | 1789406542355759104 |
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| author | López Martínez, Alejandro Valera Martínez, Diego Luis Molina Aiz, Francisco Domingo Moreno Teruel, María De Los Ángeles Peña Fernández, Ana Araceli Espinoza Ramos, Karlos |
| author_facet | López Martínez, Alejandro Valera Martínez, Diego Luis Molina Aiz, Francisco Domingo Moreno Teruel, María De Los Ángeles Peña Fernández, Ana Araceli Espinoza Ramos, Karlos |
| author_sort | López Martínez, Alejandro |
| collection | DSpace |
| description | The present work analyses the traditional method of applying whitening products on Mediterranean greenhouses. Four commercial whitening products (agricultural solar protectors, ASPs), applied at four doses, were compared with a non-whitened cover. The traditional product “Blanco de España” with 99% calcium carbonate (CaCO3) and other three products with 97% CaCO3 that incorporate adhesives were tested. The use of adhesives in ASP did not influence the effect of the different products on the inside temperature, and at the same dose all four products show a similar behaviour. The findings support the maximum dose recommended by other authors of 0.50 kg L−1 (50/100), above which the transmissivity of the greenhouse cover decreases by over 50%. The effect of ASP on the transmissivity of the cover depends principally on the dose applied, but also on the climatic conditions (solar radiation, cloud cover, etc.) and on the time of year (solar elevation). The habitual use of a constant dose throughout the year does not seem to be the most adequate. Recommended doses should vary according to the time of year and the desired degree of transmissivity reduction. The adhesive components are shown to provide a high degree of protection against heavy rain. The study recommends a standardised method of ASP application, establishing a method that allows the grower to verify the concentration of the product that will remain on the greenhouse cover. |
| format | info:eu-repo/semantics/article |
| id | oai:repositorio.ual.es:10835-7650 |
| institution | Universidad de Cuenca |
| language | English |
| publishDate | 2020 |
| publisher | MDPI |
| record_format | dspace |
| spelling | oai:repositorio.ual.es:10835-76502023-04-12T19:31:26Z Analysis of the Effect of Concentrations of Four Whitening Products in Cover Transmissivity of Mediterranean Greenhouses López Martínez, Alejandro Valera Martínez, Diego Luis Molina Aiz, Francisco Domingo Moreno Teruel, María De Los Ángeles Peña Fernández, Ana Araceli Espinoza Ramos, Karlos greenhouse agricultural solar protector crop protection cover transmissivity The present work analyses the traditional method of applying whitening products on Mediterranean greenhouses. Four commercial whitening products (agricultural solar protectors, ASPs), applied at four doses, were compared with a non-whitened cover. The traditional product “Blanco de España” with 99% calcium carbonate (CaCO3) and other three products with 97% CaCO3 that incorporate adhesives were tested. The use of adhesives in ASP did not influence the effect of the different products on the inside temperature, and at the same dose all four products show a similar behaviour. The findings support the maximum dose recommended by other authors of 0.50 kg L−1 (50/100), above which the transmissivity of the greenhouse cover decreases by over 50%. The effect of ASP on the transmissivity of the cover depends principally on the dose applied, but also on the climatic conditions (solar radiation, cloud cover, etc.) and on the time of year (solar elevation). The habitual use of a constant dose throughout the year does not seem to be the most adequate. Recommended doses should vary according to the time of year and the desired degree of transmissivity reduction. The adhesive components are shown to provide a high degree of protection against heavy rain. The study recommends a standardised method of ASP application, establishing a method that allows the grower to verify the concentration of the product that will remain on the greenhouse cover. 2020-01-20T10:35:50Z 2020-01-20T10:35:50Z 2019-03-18 info:eu-repo/semantics/article 1660-4601 http://hdl.handle.net/10835/7650 en https://www.mdpi.com/1660-4601/16/6/958 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess MDPI |
| spellingShingle | greenhouse agricultural solar protector crop protection cover transmissivity López Martínez, Alejandro Valera Martínez, Diego Luis Molina Aiz, Francisco Domingo Moreno Teruel, María De Los Ángeles Peña Fernández, Ana Araceli Espinoza Ramos, Karlos Analysis of the Effect of Concentrations of Four Whitening Products in Cover Transmissivity of Mediterranean Greenhouses |
| title | Analysis of the Effect of Concentrations of Four Whitening Products in Cover Transmissivity of Mediterranean Greenhouses |
| title_full | Analysis of the Effect of Concentrations of Four Whitening Products in Cover Transmissivity of Mediterranean Greenhouses |
| title_fullStr | Analysis of the Effect of Concentrations of Four Whitening Products in Cover Transmissivity of Mediterranean Greenhouses |
| title_full_unstemmed | Analysis of the Effect of Concentrations of Four Whitening Products in Cover Transmissivity of Mediterranean Greenhouses |
| title_short | Analysis of the Effect of Concentrations of Four Whitening Products in Cover Transmissivity of Mediterranean Greenhouses |
| title_sort | analysis of the effect of concentrations of four whitening products in cover transmissivity of mediterranean greenhouses |
| topic | greenhouse agricultural solar protector crop protection cover transmissivity |
| url | http://hdl.handle.net/10835/7650 |
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