MICROPROPAGATION - CONTROLLED ENVIRONMENT FACILITIES AND EQUIPMENT FOR WEANING

D.A.W. Steed
The micropropagation of plants is now widely practised in many countries and is well documented, but the transitional period between in-vitro culture and the subsequent growth and development of a normal plant has a number of inherent problems.

The change from a highly controlled environment to one in which light level, temperature, relative humidity and growing medium are significantly different, subjects the plant to a series of stresses which are difficult to overcome.

To reduce these stresses a small weaner unit has been developed providing the following:

  • greenhouse with high natural light transmission supplemented by two SON/T (high pressure sodium) lamps
  • oil-filled thermostatically controlled and electrically operated tubular heaters in two banks (4.8 kw) designed to provide a temperature lift of 20°C, base temperature -10°C
  • three automatically controlled roof ventilators
  • two hand-operated aluminium and polyester screens to provide shade from zero to 85% and to assist in the control of temperature and energy saving
  • accurate RH control by means of a four nozzle fogging system automatically controlled by an aspirated electronic humidistat linked to a control panel
  • benching with capillary matting and black micro-punched polyethylene film for irrigation of the pot-grown plants.
Steed, D.A.W. (1989). MICROPROPAGATION - CONTROLLED ENVIRONMENT FACILITIES AND EQUIPMENT FOR WEANING. Acta Hortic. 245, 424-428
DOI: 10.17660/ActaHortic.1989.245.56
https://doi.org/10.17660/ActaHortic.1989.245.56

Acta Horticulturae