A Continuously Ventilated Natural-light Growth Chamber Complex for Greenhouse Environmental Studies
| Autor: | John N. Walker, Jack W. Buxton |
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| Rok vydání: | 1991 |
| Předmět: | |
| Zdroj: | HortScience. 26:1047-1051 |
| ISSN: | 2327-9834 0018-5345 |
| DOI: | 10.21273/hortsci.26.8.1047 |
| Popis: | Natural-light growth chambers constructed within a greenhouse compartment were equipped with a ventilation/circulation system, two stages of heating, and evaporative cooling. Air drawn from the greenhouse compartment continuously ventilated the chambers; the air was heated or cooled to the set-point temperature. A computer-controlled environmental system maintained uniform temperatures within the chambers and maintained the temperature within ±1C of the set point at night and during periods of low solar radiation; during higher solar radiation periods, control was not as precise. Carbon dioxide concentration was accurately maintained, and the photosynthetic photon flux from supplemental high-pressure sodium lamps was ≈200 μmol·m-2·s-1. The natural-light growth chambers provide a means for studying the interactive effects of temperature, light, and other environmental variables in experiments to increase production efficiency. |
| Databáze: | OpenAIRE |
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