Method and apparatus for controlling plant growth with artificial light
US5269093A · kind A · utility
28Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1991 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Dec 2, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S47/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed are a method and an apparatus for controlling the plant growth with artificial light in plant factories, atria, etc. The stem extension and the leaf/stem dry weight ratio can be controlled artificially by the ratio of the additional far-red irradiation (700-800 nm) to the photosynthetically active radiation (400-700 nm). In a chamber for cultivating plants, an artificial lighting source, having 3-band fluoscent lamps for and far-red fluoscent lamps for far-red radiation, is employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.