A study by researchers in the Netherlands showed that long exposure with a lower intensity works well in winter blackberry

Published May 21, 2021

Tridge summary

A study by Wageningen University & Research has found that 18 hours of lower light intensity lighting can be as economically beneficial as less than 13 hours of high light intensity lighting for blackberry cultivation in winter. The research, conducted from November 2020 to March 2021, found that while more light led to higher production, it also increased electricity usage and did not necessitate high CO2 levels. The study also noted that the variety Von, which was less productive but produced heavier, nicer shaped fruits with a less sour taste and better shelf life, highlighted the importance of improving plant material.

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Original content

With the same light sum, a study by Wageningen University & Research in a winter cultivation with blackberry showed that 18 hours of lighting with a lower light intensity scored at least as high economically as more than 13 hours of lighting with a high light intensity. This means lower purchase costs of the LEDs for a grower. It is true that more light resulted in higher production, but that required more electricity per kilo of product. In winter, high CO2 levels do not appear to be necessary. The research was carried out on the blackberry varieties Loch Ness and Von and lasted from 8 November 2020 to mid-March 2021. During the same period, observations were made by the Delphy Improvement Center on the practical farm of Wouter van den Bosch. Here was the same plant material from Loch Ness, but under SON-T lighting. Long exposure with 100 µmol per m2 per second was at least as good for production and quality as short exposure with approximately 134 µmol per m2 per second. At the ...

Source: Agri Holland