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Reducing the heat requirements of a glasshouse

, : Reducing the heat requirements of a glasshouse. Acta Horticulturae (51): 19-28

By using black polyethylene covers over the crop at night the heat requirement of greenhouses was reduced on average by 35%.

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Related references

O'-Flaherty, T.C.chran, R., 1975: Determination of glasshouse heat requirements from temperature and wind records. Acta Horticulturae 46: 3-39

O.F.aherty, T.; Maher, M.J., 1987: Evaluation of lining with PVC panels as a means of reducing heat loss from a glasshouse. Internally lined and unlined glasshouses (Cambridge Alumabrite, 528 msuperscript 2) were compared for tomato production over two growing seasons. Measurements of heat consumption showed an energy saving of 26% in the lined glasshouse but the trans...

Benoit, F.; Ceustermans, N., 1979: Glasshouse vegetables with low energy requirements. Data are presented on the cropping of the cauliflower cv. F. Candries sown at different times between 12 August and 25 September and planted between 19 October and 2 February, the date of first harvest being from 16 December to 15 April. Average c...

Geissler, T., 1957: Nutrient requirements of glasshouse cucumbers. Analyses of cucumber plants after forcing showed the following average contents per plant: 371.37 g. ash, 46.03g. N, 25.25 g. P2O5, 94.85 g. K2O, 73.38 g. CaO and 13.39 g. MgO. Nitrogen, K2O and P2O5 accumulated mainly in the fruits, with ash, CaO...

Tesi, R., 1969: Climatic requirements of glasshouse crops.). A review, with tabulated data, on the temperature, CO2, R.H. and light requirements of vegetables and ornamental plants grown under glass.

Egan, S.P.; Spillane, T.A., 1976: Reducing blockages in glasshouse irrigation systems. The simple treatment described involved using chlorine compounds to clean the storage tank and a water-softening polyphosphate to prevent deposition of salts. The incidence of blockage was reduced from over 25% to less than 1%. There were no harmf...

Kaven, E., 1964: The effect of glasshouse type on labour requirements. The labour requirements were calculated for growing vegetables (lettuces, cucumbers, radishes and kohl-rabi) intensively and flowers (chrysanthemums, cyclamen and carnations) in a normal multi-span block of houses and in a large, single-span glass...

Smeets, L., 1984: Breeding for low energy requirements in glasshouse crops. Acta Horticulturae: (148) 37-42

Sheard, G.F., 1975: Energy requirements for glasshouse heating in Britain. An examination of some factors contributing to heat loss from glasshouses and methods of reducing this loss, including the use of windbreaks, efficient glasshouse design and orientation, insulation, heating systems and their control, and the possi...

Wacquant, C., 1998: Water requirements and irrigation of glasshouse crops. Irrigation requirements of plants are related to climatic factors, particularly the amount of energy the plant receives from the sun. Needs are also determined by the condition of the plant and the production goals. An additional purpose served by...