Proof-of-principle Noppenfolie-kas voor de teelt van framboos: Ontwikkeling van kas- en teeltconcept voor energie-extensieve gewassen

In 2018 a new greenhouse for low energy demand crops was developed and constructed. It consisted of an air bubble fi lm cover on a greenhouse with continuous roof ventilation and included a screen. Goal is to reduce the energy consumption and to improve production. Raspberry was chosen as pilot crop for a group of crops which might be grown in a greenhouse in future. In 2019 two cultivations took place with raspberry cultivar Diamond Jubilee. The fi rst year goals were achieved, there was a low energy use (5.7 m3/m2 compared to an expected 5 - 8 m3/m2), a high production (7.1 kg/m2 compared to an expected 6 kg/m2) and a good cultivation in containers. Plant density has to be optimized and varied between 1.8 and 2.2 canes/m2. Economically the greenhouse is cheaper as glass but especially the high ventilation capacity offers a high potential.