The effect of autumn-winter light conditions in glasshouse on the growth and the cropping-cycle of butterhead
and Iceberg lettuce
Department of Vegetables
Faculty of Horticulture, Agricultural University
Nowoursynowska 166, 02-766 Warszawa, Poland
In 1983-1985/86 the experiments were carried out to find the relationship
between the growth of fresh weght of butterhead and Iceberg lettuces and
the active daily radiation during the autumn-winter period under glass. A
close correlation between those factors was found. The growth rate in
terms of fresh weight of butterhead lettuce was higher by the lower
radiation. The linear relationship between planting and harvest dates
allows one to predict the duration of the cropping-cycle of lettuce in a glasshouse
during the autumn and winter period.
Kobryń J., 1989. The effect of autumn-winter light conditions in glasshouse on the growth and the cropping-cycle
of butterhead and Iceberg lettuces. Folia Horticulturae I/2: 17-25.