2024-11-20 バース大学
＜関連情報＞
- https://www.bath.ac.uk/announcements/light-altering-spray-for-greenhouses-could-help-lengthen-the-fruit-growing-season-in-the-uk/
- https://onlinelibrary.wiley.com/doi/10.1002/admt.202400977
発光性ダウンシフトアシスト植物成長のための透明でスプレー可能なプラスチックフィルム Transparent, Sprayable Plastic Films for Luminescent Down-Shifted-Assisted Plant Growth
Rosa Müller, Bibian Okokhere-Edeghoghon, Norbert J. Janowicz, Andrew D. Bond, Gabriele Kociok-Kohn, Lynne M. Roxbee Cox, Diana Garzon, Toby W. Waine, Ian G. Truckell, Ewan Gage …
Advanced Materials Technologies Published: 06 November 2024
DOI:https://doi.org/10.1002/admt.202400977
Abstract
The world’s steadily growing population and global heating due to climate change are a threat to food security. To meet this challenge, novel technologies are needed to increase crop production in a sustainable way. In this work, the use of luminescent down-shifting (LDS) materials based on molecular Eu3+-containing polyoxotitanates for plant growth enhancement is investigated. Using a systematic design strategy to optimize down-shifting properties, conversion of the ultraviolet spectral range to the photosynthetically active radiation (PAR) is achieved with quantum yields as high as 68%. The prototype Eu3+-compound can be incorporated into water-based acrylic varnish that can be spray-coated onto existing greenhouses. Comparing coated with uncoated greenhouses, basil plants produce 9% more leaf dry weight per plant, and a highly significant 10% increase in individual leaf dry weight. The coating reduces the amount of transmitted PAR by 8% but has advantageous effects on diffuse radiation and in reducing the internal mean temperature. Although there is some uncertainty as to the contribution of down-shifting, with the bulk of the increase probably being due to higher diffused light and the reduction in maximum daily temperatures, this study establishes a model for the design of LDS paints for real-world agricultural applications.
