Job offersmore »

Tweeting Growers

Top 5 - yesterday

  • No news has been published yesterday.

Top 5 - last week

Top 5 - last month

Exchange ratesmore »

Partial replacement of PAR light by far red light in tomato

The use of assimilation lighting in greenhouse horticulture has increased considerably over the last decade, both in area as in intensity, leading to an increase in electricity consumption. One of the advantages of LED lighting compared to HPS lighting is the higher efficiency of LEDs. Another advantage is that LEDs emit light with the desired spectral composition (colour).

In the Carbon-LED project, Wageningen University & Research, Philips, Bayer CropScience, INRA and Startlife cooperate in designing energy-efficient production systems for greenhouse horticulture, based on LED lighting. During the winter of 2016/2017, multiple tomato varieties were grown under LED lighting, with and without additional far red light. The addition of far red light led to an increase in production for all varieties, the extent to which depended on the variety.

The additional far red light goes with an increased electricity consumption. The question is therefor to which extent the far red can be deployed to replace part of the red/blue PAR light. This question will be answered during next lighting season (2017/2018). At Wageningen University & Research, business unit Glastuinbouw in Bleiswijk tomato plants varieties “Progression” and “Extension” were planted on 20 October 2017. They will be lighted with either 210 µmol/m2/s red/blue LED light or with 35 µmol/m2/s far red light in combination with 175 µmol/m2/s red/blue light. We will investigate what the consequences of this partial replacement of PAR light by far red light will be for photosynthesis, assimilate partitioning, growth and production.

The results of this trial will be used for further development of the energy-efficient production systems for horticulture based on LED lighting.

Source: Wageningen University & Research

Publication date: 11/20/2017



Other news in this sector:

3/16/2018 "To feed growing global cities Dutch companies need a different mindset"
3/16/2018 Salads straight from the city
3/16/2018 Horticultural marketing in India: trying to be on TOP of Operation Greens
3/14/2018 "Wheat grows twice as fast under LEDs"
3/14/2018 New Zealand partnership to drive innovation in perennial fruits
3/12/2018 The multiple benefits of Aqua4D
3/12/2018 Oxygen level in water: an underestimated factor in plant growth
3/8/2018 Non-woven fabric combats frost
3/8/2018 US (IL): Scientists engineer crops to conserve water, resist drought
3/8/2018 Tomato Masters expands at request of Carrefour
3/7/2018 "Structural changes necessary for healthy sector"
3/6/2018 Northern Adelaide Irrigation Scheme project proposal deadline extended
3/6/2018 Nigeria: Tomato growers say policy has enriched more farmers
3/6/2018 Israel: Winter pilot study on basil obtains a 66% increase in yield
3/5/2018 "The end of the 'grey' bell pepper is on the horizon"
3/2/2018 New biological label introduced in the US out of protest
3/2/2018 New packaging line processes 20,000 mini cucumbers per hour
3/1/2018 Maxstim shows positive results in raspberries
3/1/2018 Production and training issues facing CEA growers
3/1/2018 Hotspots for crops on Mars