PHYSIOLOGICAL AND CLIMATOLOGICAL ASPECTS OF THE OPTIMISATION OF ENERGY USE IN PROTECTED CULTIVATION

P. Gaastra
  1. Aim protected cultivation: economic production through control of quality, quantity, harvest time, variation in products.
  2. For certain crop or variety control of 1. through control of climate factors: light, radiation, temperature, humidity, air movement, CO2 concentration (soil conditions).
  3. Action of separate climate factors unspecific.
  4. Climate factors strongly correlated, but correlations not constant:
    • Correlations not constant for the same crop and glasshouse
    • Correlations different for different energy saving measures or devices:
      • energy shields
      • double glazing
      • adaptable plant distance techniques
      • double layer techniques
      • ratio convective/radiative heating
      • restricted ventilation
  5. Physiological and climatological research of importance for:
    • Analysis of multiple effects of same climate factor on different processes
    • Analysis of different climate factors on same process
    • Analysis of type of correlation between climate factors
  6. Some goals of physiological and climatological research:
    • Support for technical and economical feasibility studies of new techniques
    • Support for empirical development of new growing techniques
      • on a daily basis
      • during the season as a function of growth and development
    • Support for the empirical research on the optimisation of climate control
    • Support for the choice of relevant parameters in plant breeding
    • Selection of plant parameters for climate control (speaking plant)
    • Integration of existing knowledge of the relation plant-environment in dynamic simulation models
    • Exploitation of these models in research and practice
    • Analysis of energy demand of various climatic actions on the plant: photosynthesis versus photomorphogenesis for example
    • Prevention of side effects
  7. Present energy saving in practice and the research carried out in that respect are in fact largely aiming at optimisation and adaptation of existing types of heating, heat transfer, glasshouse types, growing patterns. In that way in the forthcoming years still much progress is to be expected.
  8. In future however, breakthroughs in the present approach of energy saving will probably be necessary. Some potentials to be
Gaastra, P. (1981). PHYSIOLOGICAL AND CLIMATOLOGICAL ASPECTS OF THE OPTIMISATION OF ENERGY USE IN PROTECTED CULTIVATION. Acta Hortic. 115, 29-30
DOI: 10.17660/ActaHortic.1981.115.2
https://doi.org/10.17660/ActaHortic.1981.115.2

Acta Horticulturae