| Investigating the performance and characteristics of lettuce growth in different environmental conditions of a vertical greenhouse with artificial light |
| Paper ID : 1069-NICAME1402 |
| Authors: |
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Gholamreza Chegini *, Mohammadreza Khoramtabrizi University of tehran, aboreihan college, agrotechnolgy department, Tehran,IRAN |
| Abstract: |
| The need for new technologies to produce food products is felt more than ever due to the increasing population and the limitation of non-renewable resources. The purpose of this research is to produce lettuce using a vertical lettuce greenhouse with artificial light as one of the alternative ways to produce agricultural products in urban areas. Using a vertical greenhouse with three platforms measuring 1*1 m2 and 2.30 m high in three layers, the growth characteristics of lettuce in different environmental conditions were investigated and evaluated. In order to meet the light needs of plants, LED lamps were used due to their low energy consumption, low heat generation, and accurate light spectrum. In this lettuce factory (PFAL), three different light spectrum combinations: (100% red), (75% red + 25% blue), (50% red + 25% blue + 25% far red), with three exposure treatments 12 , 18 and 24 hours with light intensity of 250 μmol/m2/s was used for lettuce cultivation with hydroponic feeding system. 216 lettuce plants were fully grown in this greenhouse, and the red light spectrum had the highest performance. The far-red light spectrum played the greatest role in plant height. The highest fresh and dry weight of aerial parts was in 24-hour light exposure and in red and blue treatments. This indicates that constant exposure increases the vegetative organs. Regarding fresh and dry weight of the root, its lowest value was recorded in light exposure 12-hour. |
| Keywords: |
| Vertical greenhouse, lettuce, light spectrum, LED artificial light |
| Status : Paper Accepted (Poster Presentation) |
