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ISHS Acta Horticulturae 68: International Symposium on Flower Formation in Ornamentals

GROWTH AND DEVELOPMENT OF GLASSHOUSE CUT FLOWERS CROPS IN VARIOUS CONDITIONS OF HEATING DURING THE WINTER

Author:   E. Berninger
DOI:   10.17660/ActaHortic.1977.68.9
Abstract:
The results concerning the development chiefly the rate of evolution from planting to harvest, were obtained for 2 to 4 cultivars in the species tulip, iris, gladiolus, chrysanthemum, antirrhinum, gerbera and rose, in glasshouses heated during the night at + 13°C, + 10°C and + 8°C. The results of a soil heating make-up were also noted.

The relative importance of night and day temperatures, as well as the growing degree x hours (GDH) concept are discussed.

Some of the external and internal conditions necessary for the elongation of the stems-which occurs mainly at night- are exposed.

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68_8     68     68_10

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