Current situation concerning acreage using CO2 enrichment
Currently, supplemental carbon dioxide (CO2) in the greenhouse comes from two main sources: recovery from flue gases after combustion and the injection of pressurized liquefied gas (Photo 1).
The majority of CO2 injection is practiced in heated tomato and cucumber greenhouses, accounting for 89% of greenhouse acreage in 2016 (INFOS-CTIFL No. 333, 2017). 43% of greenhouse tomato and cucumber area used CO2 from the flue gases and liquid CO2, 31% only from the flue gases and 15% only liquid CO2 (Figure 1).