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Table 3 Setpoint values for the recorded and regulated atmospheric parameters for both labelboxes

From: Preparation of uniformly labelled 13C- and 15N-plants using customised growth chambers

Regulated parameters

Set point values

Allowed parameter range

Min.

Max.

CO2 [ppmv]

400

300

1600

O2 [%]

20

–

–

Overpressure [mbar]

10

8

12

Humidity [%]

Variable

–

70

  1. CO2, O2 and overpressure were maintained at setpoints by the control unit while values below the minimum led to the activation of gas dosing system. The maximum allowed setpoint for relative humidity was defined while levels below depended on the plant biomass and thus was increasing with growth (see Fig. 1)
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Plant Methods

ISSN: 1746-4811