
‘Plants of tomorrow’ will come from here
US, Alabama- Gov. Kay Ivey toured a new state-funded research greenhouse in Huntsville today built to develop...
In the autumn of 2021, the business unit Greenhouse Horticulture of Wageningen University & Research investigated the effects of light spectrum on growth and development of four chrysanthemum varieties. Results showed that stem length can be stimulated very well by “end-of-day” lighting with 20 μmol/m²/s far-red light for 30 minutes. Furthmore, days to flowering was reduced, as well as (unwanted) shoot growth in the lowest part of the canopy. The question remains whether comparable effects can be achieved with a lower intensity or a shorter period of far-red light. That would be a good steering mechanism to be control stem length to the desired values. Another question is whether the far-red light at the end of the day is necessary during the entire cultivation period, or whether application during the first period of cultivation is sufficient.
To answer these questions, we started a cultivation of four chrysanthemum varieties under 200 μmol/m²/s full LED in May 2022. Winter conditions were simulated in IDC LED, with greenhouse cooling and maintaining a share of sunlight of approximately 20% and of LED light of 80%. Intensities of far red light at the end of the day varied between 20, 10 and 5 mol/m²/s, and the duration ranged between 10, 20 and 30 minutes. In addition, the percentages of green and far-red light in the spectrum during the day, and plants were also grown at a lower light intensity (100 mol/m²/s).
Photo Courtesy of Wageningen University & Research
US, Alabama- Gov. Kay Ivey toured a new state-funded research greenhouse in Huntsville today built to develop...
It’s been a joyful ride till this time of the year that gives us the chance to understand horticultural...
Vertical farms promise to boost food security, reduce emissions and do away with fertilisers – and they are...
SAF webinar | ‘Sustainability is a responsibility and an opportunity’ 28-07-2022 13:22 |
Watch for signs of eriophyid mites in your greenhouse 28-07-2022 12:50 |
New innovation center partner to launch CEA Summit East 28-07-2022 12:43 |
Freight Farm nets USD 12M financing from Cambridge trust 28-07-2022 11:52 |
Cinnerate expands use for effective aphid&disease control 28-07-2022 09:45 |
Ways automation can help you reduce costs 28-07-2022 08:02 |
Why VPD is important in indoor farming? 27-07-2022 17:33 |
Energy crisis: anticipating with algorithms 27-07-2022 15:33 |
Dominic Raab visits Tozer, independent veggy seed company 27-07-2022 13:52 |
The horti entrepreneurs start the knitting machine at Ridder 27-07-2022 12:52 |